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MITSUBISHI ELECTRIC MELSERVO-J4 (01) PDF SUMMARY:
What should you do before using the equipment?
You should carefully read through the Instruction Manual, Installation guide, and appended documents before attempting to install, operate, maintain, or inspect the equipment. Do not use the equipment until you have a full knowledge of the equipment, safety information, and instructions.
What are the safety instruction levels?
The safety instruction levels are classified into “WARNING” and “CAUTION”.
What does “WARNING” indicate?
“WARNING” indicates that incorrect handling may cause hazardous conditions, resulting in death or severe injury.
What does “CAUTION” indicate?
“CAUTION” indicates that incorrect handling may cause hazardous conditions, resulting in medium or slight injury to personnel or may cause physical damage. Note that the CAUTION level may lead to a serious consequence according to conditions.
What do the diagrammatic symbols indicate?
- Indicates what must not be done. For example, “No Fire” is indicated by .
- Indicates what must be done. For example, grounding is indicated by .
What is “POINT” used for in the manual?
“POINT” is used for instructions at a lower level than “WARNING” and “CAUTION”, instructions for other functions, and so on.
What should you do with the Instruction Manual after reading it?
Keep it accessible to the operator.
What should you do before wiring or inspection to prevent electric shock?
Before wiring or inspection, turn off the power and wait for 15 minutes or more until the charge lamp turns off. Then, confirm that the voltage between P+ and N- is safe with a voltage tester and others.
Where should you confirm the charge lamp is off from?
Always confirm it from the front of the servo amplifier.
What should you not do with switches to avoid electric shock?
Do not operate switches with wet hands.
What can happen if you connect an encoder for a different axis to the CN2A, CN2B, or CN2C connector of a MR-J4 multi-axis servo amplifier?
It may cause a fire.
What should you do to prevent accidental contact with hot parts of the servo amplifier?
Take safety measures, e.g. provide covers, to prevent accidental contact of hands and parts (cables, etc.) with them. The servo amplifier heat sink, regenerative resistor, servo motor, etc. may be hot while power is on or for some time after power-off.
What should you do when wiring the equipment?
Wire the equipment correctly and securely. To avoid a malfunction, connect the wires to the correct phase terminals (U, V, and W) of the servo amplifier and servo motor. Connect the servo amplifier power output (U, V, and W) to the servo motor power input (U, V, and W) directly.
What should you not let intervene between the servo amplifier power output and the servo motor power input?
Do not let a magnetic contactor, etc. intervene. Otherwise, it may cause a malfunction.
What should you do before resetting an alarm?
Before resetting an alarm, make sure that the run signal of the servo amplifier is off in order to prevent a sudden restart.
What should you do if a hazardous condition may occur due to a power failure or product malfunction?
Use a servo motor with an electromagnetic brake or external brake to prevent the condition. Configure an electromagnetic brake circuit so that it is activated also by an external EMG stop switch.
How should the electromagnetic brake circuit be configured?
The electromagnetic brake circuit should be configured so that it is activated also by an external EMG stop switch.
- Contacts must be opened with the EMG stop switch.
- Contacts must be opened when CALM (Common malfunction) or MBR (Electromagnetic brake interlock) turns off.
- 24 V DC
What should you do when an alarm has occurred?
When any alarm has occurred, eliminate its cause, ensure safety, and deactivate the alarm before restarting operation.
What should you provide to prevent unexpected restart after an instantaneous power failure?
Provide adequate protection to prevent unexpected restart after an instantaneous power failure.
What do the symbols in the target column mean?
- MR-J4-_A: [A]
- MR-J4-_B: [B]
- MR-J4W_-_B: [WB]
What happens when an error occurs during operation?
When an error occurs during operation, the corresponding alarm or warning is displayed.
What should you do if an alarm or warning occurs?
If any alarm or warning has occurred, refer to section 1.2 and take the appropriate action.
What turns off when an alarm occurs?
When an alarm occurs, ALM (Malfunction) will turn off.
What is the “Alarm and warning list”? The “Alarm and warning list” includes the following:
- 10 Undervoltage
- 10.1 Voltage drop in the control power
- 10.2 Voltage drop in the main circuit power
- 11 Switch setting error
- 11.1 Axis number setting error
- 11.2 Disabling control axis setting error
- 12 Memory error 1 (RAM)
- 12.1 RAM error 1
- 12.2 RAM error 2
- 12.3 RAM error 3
- 12.4 RAM error 4
- 12.5 RAM error 5
- 13 Clock error
- 13.1 Clock error 1
- 13.2 Clock error 2
- 14 Control process error
- 14.1 Control process error 1
- 14.2 Control process error 2
- 14.3 Control process error 3
- 14.4 Control process error 4
- 14.5 Control process error 5
- 14.6 Control process error 6
- 14.7 Control process error 7
- 14.8 Control process error 8
- 14.9 Control process error 9
- 14.A Control process error 10
- 15 Memory error 2 (EEP-ROM)
- 15.1 EEP-ROM error at power on
- 15.2 EEP-ROM error during operation
- 16 Encoder initial communication error 1
- 16.1 Encoder initial communication – Receive data error 1
- 16.2 Encoder initial communication – Receive data error 2
- 16.3 Encoder initial communication – Receive data error 3
- 16.5 Encoder initial communication – Transmission data error 1
- 16.6 Encoder initial communication – Transmission data error 2
- 16.7 Encoder initial communication – Transmission data error 3
- 16.A Encoder initial communication – Process error 1
- 16.B Encoder initial communication – Process error 2
- 16.C Encoder initial communication – Process error 3
- 16.D Encoder initial communication – Process error 4
- 16.E Encoder initial communication – Process error 5
- 16.F Encoder initial communication – Process error 6
- 17 Board error
- 17.1 Board error 1
- 17.3 Board error 2
- 17.4 Board error 3
- 17.5 Board error 4
- 17.6 Board error 5
- 19 Memory error 3 (Flash-ROM)
- 19.1 Flash-ROM error 1
- 19.2 Flash-ROM error 2
- 1A Servo motor combination error
- 1A.1 Servo motor combination error
- 1A.2 Servo motor control mode combination error
- 1E Encoder initial communication error 2
- 1E.1 Encoder malfunction
- 1F Encoder initial communication error 3
- 1F.1 Incompatible encoder
- 20 Encoder normal communication error 1
- 20.1 Encoder normal communication – Receive data error 1
- 20.2 Encoder normal communication – Receive data error 2
- 20.3 Encoder normal communication – Receive data error 3
- 20.5 Encoder normal communication – Transmission data error 1
- 20.6 Encoder normal communication – Transmission data error 2
- 20.7 Encoder normal communication – Transmission data error 3
- 20.9 Encoder normal communication – Receive data error 4
- 20.A Encoder normal communication – Receive data error 5
- 21 Encoder normal communication error 2
- 21.1 Encoder data error 1
- 21.2 Encoder data update error
- 21.3 Encoder data waveform error
- 21.4 Encoder non-signal error
- 21.5 Encoder hardware error 1
- 21.6 Encoder hardware error 2
- 21.9 Encoder data error 2
- 24 Main circuit error
- 24.1 Ground fault detected by hardware detection circuit
- 24.2 Ground fault detected by software detection function
- 25 Absolute position erased
- 25.1 Servo motor encoder – Absolute position erased
- 27 Initial magnetic pole detection error
- 27.1 Magnetic pole detection – Abnormal termination
- 27.2 Magnetic pole detection – Time out error
- 27.3 Magnetic pole detection – Limit switch error
- 27.4 Magnetic pole detection – Estimated error
- 27.5 Magnetic pole detection – Position deviation error
- 27.6 Magnetic pole detection – Speed deviation error
- 27.7 Magnetic pole detection – Current error
- 28 Linear encoder error 2
- 28.1 Linear encoder – Environment error
- 2A Linear encoder error 1
- 2A.1 Linear encoder error 1-1
- 2A.2 Linear encoder error 1-2
- 2A.3 Linear encoder error 1-3
- 2A.4 Linear encoder error 1-4
- 2A.5 Linear encoder error 1-5
- 2A.6 Linear encoder error 1-6
- 2A.7 Linear encoder error 1-7
- 2A.8 Linear encoder error 1-8
- 2B Encoder counter error
- 2B.1 Encoder counter error 1
- 2B.2 Encoder counter error 2
- 30 Regenerative error
- 30.1 Regeneration heat error
- 30.2 Regeneration signal error
- 30.3 Regeneration feedback signal error
- 31 Overspeed
- 31.1 Abnormal motor speed
- 32 Overcurrent
- 32.1 Overcurrent detected at hardware detection circuit (during operation)
- 32.2 Overcurrent detected at software detection function (during operation)
- 32.3 Overcurrent detected at hardware detection circuit (during a stop)
- 32.4 Overcurrent detected at software detection function (during a stop)
- 33 Overvoltage
- 33.1 Main circuit voltage error
- 34 SSCNET receive error 1
- 34.1 SSCNET receive data error
- 34.2 SSCNET connector connection error
- 34.3 SSCNET communication data error
- 34.4 Hardware error signal detection
- 35 Command frequency error
- 35.1 Command frequency error
- 36 SSCNET receive error 2
- 36.1 Continuous communication data error
- 37 Parameter error
- 37.1 Parameter setting range error
- 37.2 Parameter combination error
- 3A Inrush current suppression circuit error
- 3A.1 Inrush current suppression circuit error
- 3E Operation mode error
- 3E.1 Operation mode error
- 42 Servo control error
- 42.1 Servo control error by position deviation
- 42.2 Servo control error by speed deviation
- 42.3 Servo control error by torque/thrust deviation
- 45 Main circuit device overheat
- 45.1 Main circuit device overheat error
- 46 Servo motor overheat
- 46.1 Abnormal temperature of servo motor 1
- 46.2 Abnormal temperature of servo motor 2
- 46.3 Thermistor disconnected
- 46.5 Abnormal temperature of servo motor 3
- 46.6 Abnormal temperature of servo motor 4
- 47 Cooling fan error
- 47.1 Cooling fan stop error
- 47.2 Cooling fan speed reduction error
- 50 Overload 1
- 50.1 Thermal overload error 1 during operation
- 50.2 Thermal overload error 2 during operation
- 50.3 Thermal overload error 4 during operation
- 50.4 Thermal overload error 1 during a stop
- 50.5 Thermal overload error 2 during a stop
- 50.6 Thermal overload error 4 during a stop
- 51 Overload 2
- 51.1 Thermal overload error 3 during operation
- 51.2 Thermal overload error 3 during a stop
- 52 Error excessive
- 52.1 Excess droop pulse 1
- 52.3 Excess droop pulse 2
- 52.4 Error excessive during 0 torque limit
- 52.5 Excess droop pulse 3
- 54 Oscillation detection
- 54.1 Oscillation detection error
- 56 Forced stop error
- 56.2 Over speed during forced stop
- 56.3 Estimated distance over during forced stop
- 63 STO timing error
- 63.1 STO1 off
- 63.2 STO2 off
- 8A USB communication time-out error
- 8A.1 USB communication time-out error
- 8E USB communication error
- 8E.1 USB communication receive error
- 8E.2 USB communication checksum error
- 8E.3 USB communication character error
- 8E.4 USB communication command error
- 8E.5 USB communication data number error
- 888/88888 Watchdog
- 88./8888. Watchdog
What should be done when an alarm occurs?
When any alarm has occurred, eliminate its cause, ensure safety, and deactivate the alarm before restarting operation. If [AL. 25 Absolute position erased] occurs, always make home position setting again. Otherwise, it may cause an unexpected operation. As soon as an alarm occurs, make the Servo-off status and interrupt the main circuit power.
What should be avoided when certain alarms occur?
When any of the following alarms has occurred, do not cycle the power repeatedly to restart. Doing so will cause a malfunction of the servo amplifier and the servo motor. Remove its cause and allow about 30 minutes for cooling before resuming the operation: [AL. 30 Regenerative error], [AL. 45 Main circuit device overheat], [AL. 46 Servo motor overheat], [AL. 50 Overload 1], and [AL. 51 Overload 2].
What tool can be used to find the cause of an alarm?
Use MR Configurator2 to refer to a factor of alarm occurrence.
What is the cause of alarm No. 10?
Alarm No. 10, named “Undervoltage,” occurs when the voltage of the control circuit power supply has dropped or when the voltage of the main circuit power supply has dropped.
What are the possible causes and troubleshooting steps for a voltage drop in the control power (10.1)?
- (1) Check the control circuit power supply connector.
- If the connection of the control circuit power supply connector (CNP2) has a failure, connect it correctly.
- If it has no failure, check (2).
- (2) The voltage of the control circuit power supply is low.
- If the voltage is lower than 160 V AC, review the voltage of the control circuit power supply.
- If the voltage is higher than 160 V AC, check (3).
- (3) An instantaneous power failure has occurred for longer time than the specified time.
- If the power has a problem, review the power.
- The time will be 60 ms when [Pr. PA20] is “_ 0 _ ". The time will be the value set in [Pr. PF25] when [Pr. PA20] is " 1 _ _”.
What are the possible causes and troubleshooting steps for a voltage drop in the main circuit power (10.2)?
- (1) The main circuit power supply connector (CNP1) was disconnected.
- If it is disconnected, connect it correctly.
- If it is connected, check (2).
- (2) The voltage of the main circuit power supply is low.
- If the voltage is lower than 160 V AC, increase the voltage of the main circuit power supply.
- If the voltage is higher than 160 V AC, check (3).
- (3) The alarm has occurred during acceleration.
- If the bus voltage during acceleration is less than 200 V DC, increase the acceleration time constant or increase the power supply capacity.
- If the voltage is 200 V DC or more, check (4).
- (4) The servo amplifier is malfunctioning.
- If the voltage of the main circuit power supply is 160 V AC or more, and the bus voltage is less than 200 V DC, replace the servo amplifier.
What is the cause of alarm No. 11?
Alarm No. 11, named “Switch setting error,” occurs when the setting of the axis selection rotary switch or auxiliary axis number setting switch is incorrect, or when the setting of the disabling control axis switch is incorrect.
What are the possible causes and troubleshooting steps for an axis number setting error (11.1)?
- (1) The setting of the Axis No. is incorrect.
- If both of the auxiliary axis number setting switches are on, check the axis selection rotary switch if “E” is selected for MR-J4W2, (“E” or “F” is selected for MR-J4W2). Set the axis No. correctly.
- If both of the auxiliary axis number setting switches are off, replace the servo amplifier.
What are the possible causes and troubleshooting steps for a disabling control axis setting error (11.2)?
- (1) The setting of the disabling control axis switch is incorrect.
- Check if the setting is as follows: 1) Only A-axis is disabled. 2) Only B-axis is disabled. 3) A-axis and B-axis are disabled. 4) A-axis and C-axis are disabled. Set it correctly.
- If the setting is other than the above, replace the servo amplifier.
What is the cause of alarm No. 12?
Alarm No. 12, named “Memory error 1 (RAM),” occurs when a part (RAM) in the servo amplifier has failed.
What are the possible causes and troubleshooting steps for a RAM error 1 (12.1)?
- (1) A part in the servo amplifier is a failure.
- If it is repeatable, replace the servo amplifier.
- If it is not repeatable, check (2).
- Disconnect the cables except the control circuit power supply, and then check the repeatability.
- (2) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the power supply for noise.
What is the troubleshooting method for RAM errors 2-5 (12.2-12.5)?
Check it with the check method for [AL. 12.1].
What is the cause of alarm No. 13?
Alarm No. 13, named “Clock error,” occurs when a part in the servo amplifier has failed or a clock error transmitted from the controller occurred.
What are the possible causes and troubleshooting steps for a Clock error 1 (13.1)?
- (1) A part in the servo amplifier is a failure.
- If it is repeatable, replace the servo amplifier.
- If it is not repeatable, check (2).
- Disconnect the cables except the control circuit power supply, and then check the repeatability.
- (2) A clock error transmitted from the controller occurred.
- If the error occurs when you connect the amplifier to the controller, replace the controller.
- If it does not occur, check (3).
- (3) The servo amplifier of the next axis is malfunctioning.
- If the servo amplifier of the next axis is malfunctioning, replace the servo amplifier of the next axis.
- If it is not malfunctioning, check (4).
- (4) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the power supply for noise and if the connector is shorted.
What is the troubleshooting method for Clock error 2 (13.2)?
Check it with the check method for [AL. 13.1].
What is the cause of alarm No. 14?
Alarm No. 14, named “Control process error,” occurs when the process did not complete within the specified time.
What are the possible causes and troubleshooting steps for a control process error 1 (14.1)?
- (1) The parameter setting is incorrect.
- If it is incorrect, set it correctly.
- If it is correct, check (2).
- (2) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the power supply for noise. Check if the connector is shorted. If it has no failure, check (3).
- (3) The servo amplifier is malfunctioning.
- If it is not repeatable, replace the servo amplifier.
- Replace the servo amplifier, and then check the repeatability.
What are the possible causes and troubleshooting steps for a control process error 2 (14.2)?
- (1) A synchronous signal error transmitted from the controller occurred.
- If it is repeatable, replace the controller, and then check the repeatability.
- If it is not repeatable, check (2).
- (2) The parameter setting is incorrect.
- If it is incorrect, set it correctly.
- If it is correct, check (3).
- (3) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the power supply for noise. Check if the connector is shorted. If it has no failure, check (4).
- (4) The servo amplifier is malfunctioning.
- If it is not repeatable, replace the servo amplifier.
- Replace the servo amplifier, and then check the repeatability.
What is the troubleshooting method for Control process errors 3-10 (14.3-14.A)?
Check it with the check method for [AL. 14.1].
What is the cause of alarm No. 15?
Alarm No. 15, named “Memory error 2 (EEP-ROM),” occurs when a part (EEP-ROM) in the servo amplifier has failed.
What are the possible causes and troubleshooting steps for an EEP-ROM error at power on (15.1)?
- (1) EEP-ROM is malfunctioning at power on.
- If it is repeatable, replace the servo amplifier.
- If it is not repeatable, check (2).
- Disconnect the cables except the control circuit power supply, and then check the repeatability.
- (2) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the power supply for noise. Check if the connector is shorted. If it has no failure, check (3).
- (3) The number of write times exceeded 100,000.
- If parameters has been used very frequently, replace the servo amplifier, and change the process to use parameters less frequently after replacement.
What are the possible causes and troubleshooting steps for an EEP-ROM error during operation (15.2)?
- (1) EEP-ROM is malfunctioning during normal operation.
- If it occurs when you change parameters during normal operation, replace the servo amplifier.
- If it does not occur, check (2).
- (2) A write error occurred while tuning results was processed.
- If the alarm occurs after an hour from power on, replace the servo amplifier.
- If it takes less than an hour, check (3).
- (3) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the power supply for noise. Check if the connector is shorted.
What is the cause of alarm No. 16?
Alarm No. 16, named “Encoder initial communication error 1,” occurs when a communication error occurred between the encoder and servo amplifier.
What are the possible causes and troubleshooting steps for an Encoder initial communication – Receive data error 1 (16.1)?
- (1) An encoder cable is malfunctioning.
- If it has a failure, replace or repair the cable.
- Check if the encoder cable is disconnected or shorted. If it has no failure, check (2).
- (2) The servo amplifier is malfunctioning.
- If it is not repeatable, replace the servo amplifier.
- Replace the servo amplifier, and then check the repeatability. If it is repeatable, check (3).
- (3) An encoder is malfunctioning.
- If it is not repeatable, replace the servo motor.
- Replace the servo motor or linear encoder, and then check the repeatability. If it is repeatable, check (4).
- (4) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the noise, ambient temperature, vibration, etc.
What is the troubleshooting method for Encoder initial communication – Receive data error 2 (16.2)?
Check it with the check method for [AL. 16.1].
What are the possible causes and troubleshooting steps for an Encoder initial communication – Receive data error 3 (16.3)?
- (1) An axis not used is not set as disabled-axis.
- If it is not set as disabled-axis, set it as disabled-axis.
- If it is set as disabled-axis, check (2).
- (2) An encoder cable was disconnected.
- If it is not connected, connect it correctly.
- If it is connected, check (3).
- (3) The parameter setting of two-wire type/four-wire type is incorrect.
- If the setting is incorrect, set it correctly. Type A: [Pr. PC22], Type B: [Pr. PC04]
- If the setting is correct, check (4).
- (4) An encoder cable is malfunctioning.
- If it has a failure, replace or repair the cable.
- Check if the encoder cable is disconnected or shorted. If it has no failure, check (5).
- (5) The voltage of the control circuit power supply has been unstable.
- If the control circuit power supply has been an instantaneous power failure, review the power and related parts.
- If it has no failure, check (6).
- (6) The servo amplifier is malfunctioning.
- If it is not repeatable, replace the servo amplifier.
- Replace the servo amplifier, and then check the repeatability. If it is repeatable, check (7).
- (7) An encoder is malfunctioning.
- If it is not repeatable, replace the servo motor.
- Replace the servo motor, and then check the repeatability. If it is repeatable, check (8).
- (8) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the noise, ambient temperature, vibration, etc.
What is the troubleshooting method for Encoder initial communication – Transmission data errors 1-3 (16.5-16.7)?
Check it with the check method for [AL. 16.1].
What are the possible causes and troubleshooting steps for an Encoder initial communication – Process error 1 (16.A)?
- (1) The servo amplifier is malfunctioning.
- If it is not repeatable, replace the servo amplifier.
- Replace the servo amplifier, and then check the repeatability. If it is repeatable, check (2).
- (2) An encoder is malfunctioning.
- If it is not repeatable, replace the servo motor.
- Replace the servo motor, and then check the repeatability. If it is repeatable, check (3).
- (3) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the noise, ambient temperature, vibration, etc.
What is the troubleshooting method for Encoder initial communication – Process errors 2-6 (16.B-16.F)?
Check it with the check method for [AL. 16.A].
What is the cause of alarm No. 17?
Alarm No. 17, named “Board error,” occurs when a part in the servo amplifier is malfunctioning.
What are the possible causes and troubleshooting steps for a Board error 1 (17.1)?
- (1) A current detection circuit is malfunctioning.
- If the alarm occurs during the servo-on status, replace the servo amplifier.
- If it does not occur, check (2).
- (2) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the noise, ambient temperature, etc.
What is the troubleshooting method for Board error 2 (17.3)?
Check it with the check method for [AL. 17.1].
What are the possible causes and troubleshooting steps for a Board error 3 (17.4)?
- (1) The servo amplifier recognition signal was not read properly.
- If it is repeatable, replace the servo amplifier.
- If it is not repeatable, check (2).
- Disconnect the cables except the control circuit power supply, and then check the repeatability.
- (2) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the noise, ambient temperature, etc.
What are the possible causes and troubleshooting steps for a Board error 4 (17.5)?
- (1) The setting value of the rotary switch (SW1) was not read properly.
- If it is repeatable, replace the servo amplifier.
- If it is not repeatable, check (2).
- Disconnect the cables except the control circuit power supply, and then check the repeatability.
- (2) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the noise, ambient temperature, etc.
What are the possible causes and troubleshooting steps for a Board error 5 (17.6)?
- (1) The setting value of the DIP switches (SW2) was not read properly.
- If it is repeatable, replace the servo amplifier.
- If it is not repeatable, check (2).
- Disconnect the cables except the control circuit power supply, and then check the repeatability.
- (2) Something near the device caused it.
- If it has a failure, take countermeasures against its cause.
- Check the noise, ambient temperature, etc.
What should you do if you get a Flash-ROM error 1 (Alarm No. 19.1)?
If the Flash-ROM is malfunctioning and it is repeatable, replace the servo amplifier. If it is not repeatable, check for noise, ambient temperature, or other possible causes.
What should you do if you get a Flash-ROM error 2 (Alarm No. 19.2)?
Check it using the same method as for alarm 19.1.
What should you do if you get a Servo motor combination error (Alarm No. 1A.1)?
- If the combination of servo amplifier and servo motor is incorrect, use the correct combination. Check the model name of the servo motor and the corresponding servo amplifier.
- If the combination is correct, check if the setting of [Pr. PA01] corresponds to the connected servo motor. If it doesn’t, set [Pr. PA01] correctly. Rotary servo motor: “_ _ 0 ", Linear servo motor: " _ 4 ", Direct drive motor: " _ 6 _”.
- If the combination is correct and [Pr. PA01] is set correctly, replace the servo motor to check if the encoder is malfunctioning.
What should you do if you get a Servo motor control mode combination error (Alarm No. 1A.2)?
If the setting of [Pr. PA01] does not correspond to the connected servo motor, set [Pr. PA01] correctly. Rotary servo motor: “_ _ 0 ", Linear servo motor: " _ 4 ", Direct drive motor: " _ 6 _”.
What should you do if you get an Encoder initial communication error 2 (Alarm No. 1E.1)?
- If the encoder is malfunctioning and it is not repeatable, replace the servo motor.
- If it is repeatable, check for noise, ambient temperature, vibration, or other possible causes and take countermeasures.
What should you do if you get an Encoder initial communication error 3 (Alarm No. 1F.1) caused by an incompatible encoder?
- If a servo motor or linear encoder is not compatible with the servo amplifier, replace it with a compatible one.
- If the software version of the servo amplifier does not support the servo motor or linear encoder, replace the servo amplifier with one that supports it.
- If the encoder is malfunctioning and it is not repeatable, replace the servo motor or linear encoder. If it is repeatable, replace the servo amplifier.
What should you do if you get an Encoder normal communication error 1 (Alarm No. 20.1)?
- If the encoder cable is malfunctioning, repair or replace the cable. If not, check the servo amplifier.
- If the servo amplifier is malfunctioning and it is not repeatable, replace the servo amplifier. If it is repeatable, check the encoder.
- If the encoder is malfunctioning and it is not repeatable, replace the servo motor or linear encoder. If it is repeatable, check for other possible causes.
- If there are any issues with the device, take necessary action.
What should you do if you get Encoder normal communication – Receive data errors 2, 3, 4, or 5 or Encoder normal communication – Transmission data errors 1, 2, or 3 (Alarm No. 20.2, 20.3, 20.5, 20.6, 20.7, 20.9, 20.A)?
Check using the same method as for alarm 20.1.
What should you do if you get an Encoder data error 1 (Alarm No. 21.1)?
- If the encoder detected a high speed/acceleration rate due to an oscillation or other factors, decrease the loop gain. If it is not repeatable, use the encoder with low loop gain.
- If it is repeatable, and the encoder is malfunctioning, replace the servo motor. If not repeatable, check for other causes.
- If other causes exist, take countermeasures.
What should you do if you get an Encoder data update error (Alarm No. 21.2)?
- If the encoder is malfunctioning and it is not repeatable, replace the servo motor. If it is repeatable, check for noise, ambient temperature, or other possible causes.
- Take countermeasures to address the issues.
What should you do if you get an Encoder data waveform error (Alarm No. 21.3)?
Check using the same method as for alarm 21.2.
What should you do if you get an Encoder non-signal error (Alarm No. 21.4)?
- If there is a wiring issue with the linear encoder cable, review the wiring. If no issue is found, check for other possible causes.
- If other issues are found, take countermeasures.
What should you do if you get an Encoder hardware error 1 or 2 (Alarm No. 21.5, 21.6)?
Check using the same method as for alarm 21.2.
What should you do if you get an Encoder data error 2 (Alarm No. 21.9)?
Check using the same method as for alarm 21.1.
What should you do if you get a Ground fault detected by hardware detection circuit (Alarm No. 24.1)?
- If the servo amplifier is malfunctioning, replace the servo amplifier. Disconnect the servo motor power cables (U, V, and W) and check if the alarm occurs.
- If the alarm does not occur, check if the servo motor power cable is shorted, and if it is, replace the servo motor power cable.
- If the cable is not shorted, disconnect the servo motor power cables on the motor side and check insulation of the motor and if the motor is shorted, replace the servo motor.
- If the motor is not shorted, check if the main circuit power supply cable and servo motor power cable are in contact and correct the wiring if they are.
- If they are not in contact, check for other possible causes.
What should you do if you get a Ground fault detected by software detection function (Alarm No. 24.2)?
Check using the same method as for alarm 24.1.
What should you do if you get a Servo motor encoder – Absolute position erased error (Alarm No. 25.1)?
- If power was switched on for the first time in the absolute position detection system, check that the battery is mounted, and make home position return.
- If this is not the first time, check if the battery was removed when the control circuit power supply was off and if it was, check that the battery is mounted, and make home position return.
- If it was not removed, check the battery voltage. If it is less than DC 3.0 V, replace the battery.
- If it is DC 3.0 V or more, check if a recommended wire is used and if not, use a recommended wire.
- If a recommended wire is used, check for loose connections in the battery cable and if found, replace the battery cable.
- If there are no loose connections in the battery cable, check for loose connections in the encoder cable and repair or replace the encoder cable.
- If there are no loose connections in the encoder cable, and the absolute position storage unit is not connected, connect it correctly.
- If the absolute position storage unit is connected, and the servo amplifier is malfunctioning and it is not repeatable, replace the servo amplifier.
- If it is repeatable, and the encoder is malfunctioning, replace the servo motor. If it is not repeatable, replace the servo motor.
What should you do if you get a Magnetic pole detection – Abnormal termination error (Alarm No. 27.1)?
- If a moving part collided against the machine, move the start position of the magnetic pole detection.
- If there was no collision, check if the wiring of the servo motor power cable is correct and if not, correct the wiring.
- If the wiring is correct, check the settings of [Pr. PL02] and [Pr. PL03] and set it correctly if it is not correct.
- If the setting is correct, check the mounting direction of the linear encoder, and mount it correctly if it is not correct.
- If the mounting direction is correct, and the magnetic pole detection voltage level is small, increase the travel distance with the [Pr. PL09] setting.
- If the travel distance is too long or a vibration is occurring, review the [Pr. PL17] setting.
What should you do if you get a Magnetic pole detection – Time out error (Alarm No. 27.2)?
- If only one of the limit switches of FLS/RLS is on, remove the cause and move the start position of the magnetic pole detection.
- If no limit switch issue is found, and the magnetic pole detection voltage level is small, increase it with the [Pr. PL09] setting.
What should you do if you get a Magnetic pole detection – Limit switch error (Alarm No. 27.3)?
If both limit switches of FLS/RLS are on during the magnetic pole detection, turn off the limit switches.
What should you do if you get a Magnetic pole detection – Estimated error (Alarm No. 27.4)?
Check using the same method as for alarm 27.1.
What should you do if you get a Linear encoder – Environment error (Alarm No. 28.1)?
- If the ambient temperature of the linear encoder is out of specifications, lower the temperature and contact the linear encoder manufacturer.
- If the temperature is within specifications and the signal level of the linear encoder has dropped, correct the mounting method of the linear encoder.
What should you do if you get a Linear encoder error 1-1 (Alarm No. 2A.1)?
- If the mounting condition of the linear encoder and head is faulty, adjust the positions of the scale and head, and then check the repeatability. If it is not repeatable, use the equipment at the adjusted position.
- If it is repeatable, check for noise, ambient temperature, vibration, or other possible causes. If a failure is found take countermeasures.
- If no cause is found, and an alarm of the linear encoder was detected, check the content of the alarm detail list of the Linear Encoder Instruction Manual and remove its cause.
What should you do if you get a Linear encoder error 1-2, 1-3, 1-4, 1-5, 1-6, 1-7, or 1-8 (Alarm No. 2A.2, 2A.3, 2A.4, 2A.5, 2A.6, 2A.7, 2A.8)?
Check using the same method as for alarm 2A.1.
What should you do if you get an Encoder counter error 1 (Alarm No. 2B.1)?
- If the encoder cable is malfunctioning, repair or replace the cable.
- If the encoder cable is not the issue, check for noise, ambient temperature, vibration, or other possible causes. If a failure is found, take countermeasures.
- If there are no other causes, and the encoder is malfunctioning, replace the direct drive motor.
What should you do if you get an Encoder counter error 2 (Alarm No. 2B.2)?
Check using the same method as for alarm 2B.1.
What should you do if you get a Regeneration heat error (Alarm No. 30.1)?
- If the setting of the regenerative resistor (regenerative option) is incorrect, set it correctly. Check the regenerative resistor (regenerative option) and [Pr. PA02] setting.
- If the setting is correct, and the regenerative resistor (regenerative option) is not connected, connect it correctly.
- If it is connected correctly, and the power supply voltage is high, reduce the power supply voltage.
- If it is less than 240 V AC, and the regenerative load ratio is over 100%, reduce the frequency of positioning, reduce the load, use a regenerative option if not being used or review the regenerative option capacity.
What should you do if you get a Regeneration signal error (Alarm No. 30.2)?
If a detection circuit of the servo amplifier is malfunctioning, and the regenerative resistor (regenerative option) is overheating abnormally, replace the servo amplifier.
What should you do if you get a Regeneration feedback signal error (Alarm No. 30.3)?
- If a detection circuit of the servo amplifier is malfunctioning and the alarm occurs, replace the servo amplifier. Remove the regenerative option or built-in regenerative resistor and then check if the alarm occurs at power on.
- If the alarm does not occur, check for noise, ground fault, ambient temperature, or other possible causes. If a failure is found, take countermeasures.
What should you do if you get an Overspeed alarm (Alarm No. 31.1)?
- If the command pulse frequency is high, check operation pattern.
- If the command from the controller is excessive, check operation pattern.
- If a larger speed command than the overspeed alarm level was inputted, review the [Pr. PC08] setting. Check that the actual motor speed is higher than the setting value of [Pr. PC08 Overspeed alarm detection level].
- If the servo motor was at the maximum torque (maximum thrust) at the time of acceleration, increase the acceleration/deceleration time constant, or reduce the load.
- If the servo system is unstable and oscillating, adjust the servo gain or reduce the load.
- If the velocity waveform has overshot, increase the acceleration/deceleration time constant.
- If the connection destination of the encoder cable is incorrect, wire it correctly.
- If the encoder or linear encoder is malfunctioning, and if the alarm is occurring during less than permissible instantaneous speed, replace the servo motor or linear encoder.
What should you do if an overcurrent alarm (32.1) occurs due to a malfunctioning servo amplifier during operation?
Disconnect the servo motor power cables (U, V, and W) and check if the alarm occurs. If it does not occur, proceed to check other potential causes. If the alarm persists, replace the servo amplifier.
What steps should you take if a ground fault or short circuit occurs at the servo motor power cable?
Check if only the servo motor power cable is shorted. If it is, replace the servo motor power cable. If it is not, proceed to check other potential causes.
What should you do if the servo motor is malfunctioning due to a ground fault?
Disconnect the servo motor power cables on the motor side, and check the insulation of the motor (between U, V, W, and ground). If a ground fault is occurring, replace the servo motor.
What should you do if the dynamic brake is malfunctioning?
Check if the error occurs when you turn on the servo-on command. If it does occur, replace the servo amplifier.
What should you do if the connection destination of the encoder cable is incorrect?
Check the connection destinations of CN2A, CN2B, and CN2C. If the wiring is incorrect, wire it correctly.
What should you do if something near the device caused the overcurrent alarm?
Check the noise, ambient temperature, etc. If there is a failure, take countermeasures against its cause.
What should you do if an overcurrent alarm (32.2) occurs due to high servo gain?
Check if an oscillation is occurring. If an oscillation is occurring, reduce the speed loop gain ([Pr. PB09]).
What should you do if an overcurrent alarm (32.2) occurs due to a malfunctioning servo amplifier?
Disconnect the servo motor power cables (U, V, and W) and check if the alarm occurs. If it occurs, replace the servo amplifier.
What action should be taken when an overcurrent is detected at the hardware detection circuit during a stop (32.3)?
Check it with the check method for [AL. 32.1].
What action should be taken when an overcurrent is detected at the software detection function during a stop (32.4)?
Check it with the check method for [AL. 32.2].
What should you do if the setting of the regenerative resistor is incorrect, causing an overvoltage alarm (33.1)?
Check the regenerative resistor (regenerative option) and [Pr. PA02] setting, then set it correctly.
What should you do if the regenerative resistor is not connected correctly, causing an overvoltage alarm (33.1)?
Check if the regenerative resistor (regenerative option) is connected correctly, and if not, connect it correctly.
What should you do if there is wire breakage of the built-in regenerative resistor or regenerative option?
Measure the resistance of the built-in regenerative resistor or regenerative option. If the resistance is abnormal, replace the servo amplifier when using a built-in regenerative resistor, or replace the regenerative option when using a regenerative option.
What should you do if the regeneration capacity is insufficient?
Set a larger deceleration time constant, and then check the repeatability. If it is not repeatable, use a regenerative option when using a built-in regenerative resistor. When using a regenerative option, use a larger capacity one.
What should you do if the power supply voltage is too high?
Check the input voltage. If it is over 264 V AC, reduce the input voltage.
What should you do if something near the device caused an overvoltage alarm?
Check the noise, ambient temperature, etc. If there is a failure, take countermeasures against its cause.
What should you do if the SSCNET III cable is disconnected, causing a SSCNET receive error (34.1)?
Turn off the control circuit power supply of the servo amplifier, and then connect the SSCNET III cable.
What should you do if the surface at the end of the SSCNET III cable is dirty?
Wipe off the dirt from the cable tip, and then check the repeatability. If it is not repeatable, take measure to keep the cable tip clean.
What should you do if the SSCNET III cable is broken or severed?
Check if the SSCNET III cable is malfunctioning. If it has a failure, replace the SSCNET III cable.
What should you do if a vinyl tape is stacked to the SSCNET III cable or a wire insulator containing migrating plasticizer is adhered to the cable?
Check if a vinyl tape is used. Check if the cable is contacting with other cables. If they are in contact, take countermeasures against its cause.
What should you do if the servo amplifier is malfunctioning, causing a SSCNET receive error (34.1)?
Replace the servo amplifier, and then check the repeatability. If it is not repeatable, replace the servo amplifier.
What should you do if the previous or next axis servo amplifier of the alarm occurred is malfunctioning?
Replace the previous and next servo amplifier of the alarm occurred axis, and then check the repeatability.
What should you do if the controller is malfunctioning, causing a SSCNET receive error (34.1)?
Replace the controller, and then check the repeatability. If it is not repeatable, replace the controller.
What should you do if something near the device caused a SSCNET receive error (34.1)?
Check the noise, ambient temperature, etc. If there is a failure, take countermeasures against its cause.
What should you do if there is a SSCNET connector connection error (34.2)?
Check it with the check method for [AL. 34.1].
What should you do if the command pulse frequency is too high, causing a command frequency error (35.1)?
Check the command pulse frequency and check operation pattern.
What should you do if the command from the controller is excessive?
Check if the command from the controller is over the permissible speed and check operation pattern.
What should you do if the controller is malfunctioning, causing a command frequency error (35.1)?
Replace the controller, and then check the repeatability. If it is not repeatable, replace the controller.
What should you do if something near the device caused a command frequency error (35.1)?
Check the noise, ambient temperature, etc. If there is a failure, take countermeasures against its cause.
What should you do if the SSCNET III cable is disconnected, causing a SSCNET receive error (36.1)?
Turn off the control circuit power supply of the servo amplifier, and then connect the SSCNET III cable.
What should you do if the surface at the end of the SSCNET III cable is dirty, causing a SSCNET receive error (36.1)?
Wipe off the dirt from the cable tip, and then check the repeatability. If it is not repeatable, take measure to keep the cable tip clean.
What should you do if the servo amplifier is malfunctioning, causing a SSCNET receive error (36.1)?
Replace the servo amplifier, and then check the repeatability. If it is not repeatable, replace the servo amplifier.
What should you do if a parameter was set out of the setting range, causing a parameter error (37.1)?
Check the parameter error No. and setting value. If it is out of setting range, set it within the range.
What should you do if the parameter setting has changed due to a servo amplifier malfunction?
Replace the servo amplifier, and then check the repeatability. If it is not repeatable, replace the servo amplifier.
What should you do if a parameter setting contradicts another, causing a parameter combination error (37.2)?
Check the parameter error No. and setting value. If a setting value is incorrect, correct the setting value.
What should you do if the inrush current suppression circuit is faulty?
Replace the servo amplifier, and then check the repeatability. If it is not repeatable, replace the servo amplifier.
What should you do if the MR-J4 servo amplifier used in J3 compatibility mode was connected to another SSCNET III/H controller or vice versa, causing an operation mode error (3E.1)?
Initialize the servo amplifier with the built-in application software “MR-J4(W)-B mode selection” of MR Configurator2, and then connect the amplifier to the controller.
What should you do if the [Pr. PA01] setting value was changed, causing an operation mode error (3E.1)?
Check if [Pr. PA01] was changed. If it was, set [Pr. PA01] correctly.
What should you do if the linear encoder resolution setting differs from the setting value, causing a servo control error (42.1)?
Check the setting of [Pr. PL02] and [Pr. PL03]. If the setting is incorrect, set it correctly.
What should you do if the mounting direction of the linear encoder is incorrect, causing a servo control error (42.1)?
Check the polarities of the linear encoder and the linear servo motor. If the mounting direction is incorrect, mount it correctly.
What should you do if the connection of the servo motor is incorrect, causing a servo control error (42.1)?
Check the wiring. If the wiring is incorrect, connect it correctly.
What should you do if the initial magnetic pole detection was not executed, causing a servo control error (42.1)?
Execute the magnetic pole detection, and then check the repeatability. If it is not repeatable, execute the magnetic pole detection.
What should you do if the position deviation exceeded the detection level, causing a servo control error (42.1)?
Check the value of droop pulses. If the deviation is large, review the operation status and review the [Pr. PL05] setting depending on circumstances.
What should you do if the speed deviation exceeded the detection level, causing a servo control error (42.2)?
Calculate the deviation between the speed command and actual speed. If the deviation is large, review the operation status and review the [Pr. PL06] setting depending on circumstances.
What should you do if the torque deviation exceeded the detection level, causing a servo control error (42.3)?
Calculate the deviation between the current command and torque. If the deviation is large, review the operation status and review the [Pr. PL07] setting depending on circumstances.
What should you do if the ambient temperature has exceeded 55 ˚C, causing a main circuit device overheat error (45.1)?
Check the ambient temperature. If it is over 55 ˚C, lower the ambient temperature.
What should you do if the close mounting is out of specifications, causing a main circuit device overheat error (45.1)?
Check the specifications of close mounting. If it is out of specifications, use within the range of specifications.
What should you do if turning on and off were repeated under the overload status, causing a main circuit device overheat error (45.1)?
Check if the overload status occurred many times. If it did, check operation pattern.
What should you do if a cooling fan, heat sink, or openings is clogged with foreign matter, causing a main circuit device overheat error (45.1)?
Clean the cooling fan, heat sink, or openings, and then check the repeatability. If it is not repeatable, clean it periodically.
What should you do if the servo amplifier is malfunctioning, causing a main circuit device overheat error (45.1)?
Replace the servo amplifier, and then check the repeatability. If it is not repeatable, replace the servo amplifier.
What should you do if the ambient temperature of the servo motor exceeds 40 ˚C?
Lower the ambient temperature.
What should you check if the ambient temperature of the servo motor is less than 40 ˚C?
Check if the servo motor is overloaded.
How do you check if the servo motor is overloaded?
Check the effective load ratio.
What should you do if the effective load ratio is large?
Reduce the load or review the operation pattern.
What should you do if the effective load ratio is small?
Check if the thermal sensor in the encoder is malfunctioning.
How do you check if the thermal sensor in the encoder is malfunctioning?
Check the servo motor temperature when the alarm occurs.
What should you do if the servo motor temperature is low when the alarm occurs?
Replace the servo motor.
What should you do if the thermistor wire is not connected?
Connect it correctly.
What should you do if the thermistor wire is disconnected?
Repair the lead wire.
What should you do if the thermistor wire is not disconnected?
Replace the servo motor.
What should you do if a current was applied to the servo amplifier in excess of its continuous output current?
Reduce the load or review the operation pattern. Or use a larger capacity motor.
What should you do if something has been caught in the cooling fan?
Remove the foreign matter.
What should you do if nothing has been caught in the cooling fan?
Check if the cooling fan is stopping or check the cooling fan speed.
What should you do if the cooling fan is stopping?
Replace the servo amplifier.
What should you do if the fan speed is less than the alarm occurrence level?
Replace the servo amplifier.
What should you do if the servo motor power cable is disconnected?
Repair or replace the servo motor power cable.
What should you do if the connection of the servo motor is incorrect?
Connect it correctly.
What should you do if the electromagnetic brake has not released?
Release the electromagnetic brake.
What should you do if the connection destination of the encoder cable is incorrect?
Connect it correctly.
What should you do if the servo system is unstable and resonating?
Adjust gains.
What should you do if the servo amplifier is malfunctioning and it is not repeatable?
Replace the servo amplifier.
What should you do if the encoder or liner encoder is malfunctioning and it is not repeatable?
Replace the servo motor or linear encoder.
What should you do if a moving part collided against the machine?
Check operation pattern.
What should you do if hunting occurs during servo-lock?
Adjust gains.
What should you do if the torque is saturated?
Reduce the load or review the operation pattern. Or use a larger capacity motor.
What should you do if the torque limit has been enabled?
Increase the torque limit value.
What should you do if the power supply voltage dropped?
Check the power supply voltage and power supply capacity.
What should you do if the acceleration/deceleration time constant is too short?
Increase the acceleration/deceleration time constant.
What should you do if the position loop gain is small?
Increase the position loop gain ([Pr. PB08]).
What should you do if the servo motor shaft was rotated by external force?
Review the machine.
What should you do if the torque ripple is vibrating?
Adjust the servo gain with the auto tuning. Set the machine resonance suppression filter.
What should you do if the resonance frequency of the equipment is different from the filter setting value?
Change the setting value of the machine resonance suppression filter.
What should you do if the forced stop deceleration time constant value is short?
Increase the parameter setting value.
What should you do if STO1 was turned off under the following speed conditions? 1) Servo motor speed: 50 r/min or more 2) Linear servo motor speed: 50 mm/s or more 3) Direct drive motor speed: 5 r/min or more
Turn on STO1.
What should you do if STO2 was turned off under the following speed conditions? 1) Servo motor speed: 50 r/min or more 2) Linear servo motor speed: 50 mm/s or more 3) Direct drive motor speed: 5 r/min or more
Turn on STO2.
What should you do if communication commands have not been transmitted?
Transmit a command.
What should you do if a USB cable is disconnected?
Replace the USB cable.
What should you do if a USB cable is malfunctioning?
Replace the USB cable.
What should you do if the setting of the personal computer is incorrect?
Review the settings.
What should you do if the transmitted character is out of specifications?
Correct the transmission data.
What should you do if the communication protocol is not conforming?
Modify the transmission data according to the communication protocol.
What should you do if the transmitted command is out of specifications?
Correct the transmission data.
What should you do if the transmitted data number is out of specifications?
Correct the transmission data.
What should you do if the [AL. E3 Absolute position counter warning] occurs?
If [AL. E3 Absolute position counter warning] occurs, always make home position setting again. Otherwise, it may cause an unexpected operation.
What should you not do when certain alarms occur?
When any of the following alarms has occurred, do not cycle the power of the servo amplifier repeatedly to restart. Doing so will cause a malfunction of the servo amplifier and the servo motor. If the power of the servo amplifier is switched off/on during the alarms, allow more than 30 minutes for cooling before resuming operation.
- [AL. 91 Servo amplifier overheat warning]
- [AL. E0 Excessive regeneration warning]
- [AL. E1 Overload warning 1]
- [AL. E2 Servo motor overheat warning]
- [AL. EC Overload warning 2]
What happens when [AL. E6], [AL. E7], [AL. E9], [AL. EA], or [AL. EB] occurs, and what should you do if any other warning occurs?
If [AL. E6], [AL. E7], [AL. E9], [AL. EA], or [AL. EB] occurs, the servo-off status is established. If any other warning occurs, operation can be continued but an alarm may take place or proper operation may not be performed. Remove the cause of warning according to this section. Use MR Configurator2 to refer to a factor of warning occurrence.
What should you do if the ambient temperature of the servo amplifier exceeds 55 ˚C?
If the ambient temperature is over 55 ˚C, lower the ambient temperature. If it is less than 55 ˚C, check the specifications of close mounting. If the close mounting is out of specifications, use within the range of specifications.
What should you do if the battery cable is disconnected?
Check if the battery cable is malfunctioning. If it has a failure, replace or repair the cable. If it has no failure, check the battery voltage with a tester. If the voltage is less than DC 3.1 V, replace the battery. If it is DC 3.1 V or more, check if an encoder cable was disconnected. If the encoder cable is disconnected, replace or repair the cable.
What should you do if the battery has deteriorated?
Replace the battery, and then check the repeatability. If it is not repeatable, replace the battery.
What should you do if STO1 or STO2 was turned off under specific speed conditions?
Check if STO1 or STO2 is off. If it is off, turn it on. The speed conditions are:
- Servo motor speed: 50 r/min or less
- Linear servo motor speed: 50 mm/s or less
- Direct drive motor speed: 5 r/min or less
What should you do if INP (In-position) did not turn on within the specified time during home positioning?
Check the droop pulses during home positioning. If it is in the In-position range or more, adjust gains to set droop pulses within the In-position range. Remove the cause of droop pulse occurrence.
What should you do if a command has already been inputted at the time of home positioning?
Set it after home positioning. If a command is not inputted, check if the creep speed is high. If it is high, decrease the creep speed, and then check the repeatability. If it is not repeatable, reduce the creep speed.
What should you do if a home positioning was executed during servo-off?
Turn to servo-on, and then execute the home positioning.
What should you do if the forward or reverse rotation stroke limit switch has not connected?
Connect it correctly. If it is connected, check if the forward or reverse rotation stroke limit was exceeded during driving. If it turned off, check operation pattern.
What should you do if the battery voltage is low and the battery is consumed?
Check the battery voltage with a tester. If it is less than DC 4.9 V, replace the battery.
What should you do if the absolute position storage unit has not connected?
Check if the absolute position storage unit is connected correctly. If it is not connected, connect it correctly.
What should you do if the regenerative power exceeded 85% of the permissible regenerative power?
Check the effective load ratio. If it is 85% or more, reduce the frequency of positioning, increase the deceleration time constant, reduce the load, or use a regenerative option if not being used.
What should you do if the load was over 85% to the alarm level of [AL. 50 Overload 1] or [AL. 51 Overload 2]?
Check it with the check method for the specific overload error, such as [AL. 50.1], [AL. 50.2], [AL. 51.1], [AL. 50.3], [AL. 50.4], [AL. 50.5], [AL. 51.2], or [AL. 50.6]
What should you do if the temperature of the linear servo motor or direct drive motor reached 85% of the occurrence level of [AL. 46.2 Abnormal temperature of servo motor 2]?
Check it with the check method for [AL. 46.2].
What should you do if the travel distance from the home position exceeded 32768 rotation in the absolute position system?
Review operation range and execute the home position return again.
What should you do if something near the device caused an encoder absolute positioning counter warning?
Check the noise, ambient temperature, etc. If it has a failure, take countermeasures against its cause. If it has no failure, check if the encoder is malfunctioning. If it is, replace the servo motor, and then check the repeatability. If it is not repeatable, replace the servo motor.
What should you do if a parameter value set from servo system controller is outside setting range?
Set it within the range.
What should you do if the wiring of I/O signals is incorrect or the ladder program of the programmable controller is incorrect during ABS data transfer?
If the wiring of I/O signals is incorrect, repair or replace the I/O signal wire. If the ladder program is incorrect, modify the program.
What should you do if EM2/EM1 (Forced stop) turned off?
Ensure safety and turn on EM2/EM1 (Forced stop). If it is on, check if an external 24 V DC power supply have not inputted. If it is not inputted, input the 24 V DC power supply. If it is inputted, replace the servo amplifier, and then check the repeatability. If it is not repeatable, replace the servo amplifier.
What should you do if the forced stop signal of the servo system controller was inputted?
Ensure safety and cancel the forced stop signal of the controller.
What should you do if foreign matter is caught in the cooling fan, or the cooling fan life expired?
If something has been caught, remove the foreign matter. If nothing has been caught, and the cooling fan life has expired, replace the servo amplifier.
What should you do if the main circuit power supply is off when the servo-on signal is on?
Turn on the main circuit power. If it is inputted, check the main circuit power supply connector. If it is disconnected, connect it correctly. If it has no failure, check the bus voltage. If it is less than 215 V DC, review the wiring and check the power supply capacity.
What should you do if the bus voltage dropped during the linear servo motor driving under 50 m/s?
Check the bus voltage. If it is less than 200 V DC, review the power supply capacity and increase the acceleration time constant.
What should you do if the wiring of I/O signals is incorrect or the ladder program of the programmable controller is incorrect for ABS servo-on warning?
If the wiring of I/O signals is incorrect, repair or replace the I/O signal wire. If the ladder program is incorrect, modify the program.
What should you do if [AL. 24 Main circuit error] or [AL. 32 Overcurrent] occurred in other axis?
If [AL. 24] is occurring at other axis, eliminate the cause of [AL. 24] on the other axis side. If [AL. 32] is occurring at other axis, eliminate the cause of [AL. 32] on the other axis side. If “All alarms” was set for alarm occurrence, remove the cause of the occurring alarm at other axis.
What should you do if the load is too large or the capacity is not enough for Overload 2 warning?
Check the effective load ratio. If the effective load ratio is high, reduce the load or replace the servo motor with one of larger capacity.
What should you do if the output wattage of the servo motor exceeded 150% of the rated output?
Check the servo motor speed and torque, or check the motor speed and thrust. If the output wattage is 150% of rating, reduce the servo motor speed and reduce the load.
What should you do if the voltage of the control circuit power supply has dropped or the setting value of the machine resonance suppression filter was changed due to a machine resonance?
If the voltage of the control circuit power supply has dropped, check it with the check method for alarm No. “10.1”. If the setting value of the machine resonance suppression filter was changed frequently, set the machine resonance suppression filter and check the machine status if screws are loose or the like.
What should you do if the Flash-ROM is malfunctioning or if data were not written to the drive recorder area?
If the Flash-ROM is malfunctioning, disconnect the cables except the control circuit power supply, and then check the repeatability. If it is repeatable, replace the servo amplifier. If data were not written to the drive recorder area, check if the records have all written. If they have all written, delete the records in the drive recorder window of MR Configurator2.
What should you do if an oscillation detection warning occurs?
Check it with the check method for [AL. 54.1].
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