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General-Purpose AC Servo
MELSERVO-J4 Servo amplifier
INSTRUCTION MANUAL (TROUBLE SHOOTING)
M

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Troubleshooting

   Related Manuals for Mitsubishi Electric MELSERVO-J4

   Summary of Contents for Mitsubishi Electric MELSERVO-J4

  • Page 1

    General-Purpose AC Servo MELSERVO-J4 Servo amplifier INSTRUCTION MANUAL (TROUBLE SHOOTING)

  • Page 2: Safety Instructions

    Safety Instructions Please read the instructions carefully before using the equipment. To use the equipment correctly, do not attempt to install, operate, maintain, or inspect the equipment until you have read through this Instruction Manual, Installation guide, and appended documents carefully. Do not use the equipment until you have a full knowledge of the equipment, safety information and instructions.

  • Page 3

    1. To prevent electric shock, note the following WARNING Before wiring or inspection, turn off the power and wait for 15 minutes or more (20 minutes or more for converter unit) until the charge lamp turns off. Then, confirm that the voltage between P+ and N- (between L+ and L- for converter unit) is safe with a voltage tester and others.

  • Page 4

    (2) Usage CAUTION Before resetting an alarm, make sure that the run signal of the servo amplifier (drive unit) is off in order to prevent a sudden restart. Otherwise, it may cause an accident. Use the servo amplifier (drive unit) and converter unit with the specified servo motor. (3) Corrective actions CAUTION Ensure safety by confirming the power off, etc.

  • Page 5

    «About the manual» This Instruction Manual covers the following models. These include servo amplifiers (drive units) which have optional units. MR-J4-_A/MR-J4-_A4/MR-J4-_A1/MR-J4-_A-RJ/MR-J4-_A4-RJ/MR-J4-_A1-RJ MR-J4-_B/MR-J4-_B4/MR-J4-_B1/MR-J4-_B-RJ/MR-J4-_B4-RJ/MR-J4-_B1-RJ MR-J4W_-_B MR-J4-_B-RJ010/MR-J4-_B4-RJ010 MR-J4-03A6/MR-J4-03A6-RJ/MR-J4W2-0303B6 MR-J4-_GF/MR-J4-_GF4/MR-J4-_GF-RJ/MR-J4-_GF4-RJ MR-J4-DU_A/MR-J4-DU_A4/MR-J4-DU_A-RJ/MR-J4-DU_A4-RJ MR-J4-DU_B/MR-J4-DU_B4/MR-J4-DU_B-RJ/MR-J4-DU_B4-RJ MR-CV_ MR-CR55K/MR-CR55K4 The symbols in the target column mean as follows. [A]: MR-J4-_A/MR-J4-_A4/MR-J4-_A1/MR-J4-_A-RJ/MR-J4-_A4-RJ/MR-J4-_A1-RJ/MR-J4-DU_A/ MR-J4-DU_A4/MR-J4-DU_A-RJ/MR-J4-DU_A4-RJ/MR-J4-03A6/MR-J4-03A6-RJ [B]: MR-J4-_B/MR-J4-_B4/MR-J4-_B1/MR-J4-_B-RJ/MR-J4-_B4-RJ/MR-J4-_B1-RJ/ MR-J4-DU_B/MR-J4-DU_B4/MR-J4-DU_B-RJ/MR-J4-DU_B4-RJ...

  • Page 6: Table Of Contents

    CONTENTS 1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) 1- 1 to 1-130 1.1 Explanation for the lists ........................1- 1 1.2 Alarm list ............................1- 3 1.3 Warning list ............................1-13 1.4 Remedies for alarms ........................1-16 1.5 Remedies for warnings ........................1-92 1.6 Trouble which does not trigger alarm/warning ................

  • Page 7

    MEMO...

  • Page 8: Troubleshooting For Servo Amplifier (drive Unit)

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) 1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) POINT As soon as an alarm occurs, turn SON (Servo-on) off and interrupt the power. [AL. 37 Parameter error] and warnings (except [AL. F0 Tough drive warning]) are not recorded in the alarm history.

  • Page 9

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) (5) Stop system (only for MR-J4W_-_B_) This means target axis to stop when the alarm occurs. Each axis: Only alarming axis will stop. All axes: All axes will stop. (6) Alarm code (only MR-J4-_A_(-RJ)/MR-J4-DU_A_(-RJ)) To output alarm codes, set [Pr.

  • Page 10: Alarm List

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) 1.2 Alarm list Alarm deactivation Alarm code (Note 8) Stop Process- Stop method Detail Cycling Name Detail name system Alarm ACD3 ACD2 ACD1 ACD0 system (Note (Note 9) reset reset (Bit 3) (Bit 2) (Bit 1) (Bit 0) (Note 9)

  • Page 11

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm deactivation Alarm code (Note 8) Stop Process- Stop method Detail Cycling Name Detail name system Alarm ACD3 ACD2 ACD1 ACD0 system (Note (Note 9) reset reset (Bit 3) (Bit 2) (Bit 1) (Bit 0) (Note 9) 2, 3)

  • Page 12

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Stop Alarm deactivation Alarm code (Note 8) Process- Stop method Detail Cycling Name Detail name system Alarm ACD3 ACD2 ACD1 ACD0 system (Note (Note 9) reset reset (Bit 3) (Bit 2) (Bit 1) (Bit 0) (Note 9) 2, 3)

  • Page 13

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Stop Alarm deactivation Alarm code (Note 8) Process- Stop method Detail Cycling Name Detail name system Alarm ACD3 ACD2 ACD1 ACD0 system (Note (Note 9) reset reset (Bit 3) (Bit 2) (Bit 1) (Bit 0) (Note 9) 2, 3)

  • Page 14

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Stop Alarm deactivation Alarm code (Note 8) Process- Stop method Detail Cycling Name Detail name system Alarm ACD3 ACD2 ACD1 ACD0 system (Note (Note 9) reset reset (Bit 3) (Bit 2) (Bit 1) (Bit 0) (Note 9) 2, 3)

  • Page 15

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Stop Alarm deactivation Alarm code (Note 8) Process- Stop method Detail Cycling Name Detail name system Alarm ACD3 ACD2 ACD1 ACD0 system (Note (Note 9) reset reset (Bit 3) (Bit 2) (Bit 1) (Bit 0) (Note 9) 2, 3)

  • Page 16

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Stop Alarm deactivation Alarm code (Note 8) Process- Stop method Detail Cycling Name Detail name system Alarm ACD3 ACD2 ACD1 ACD0 system (Note (Note 9) reset reset (Bit 3) (Bit 2) (Bit 1) (Bit 0) (Note 9) 2, 3)

  • Page 17

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Stop Alarm deactivation Alarm code (Note 8) Process- Stop method Detail Cycling Name Detail name system Alarm ACD3 ACD2 ACD1 ACD0 system (Note (Note 9) reset reset (Bit 3) (Bit 2) (Bit 1) (Bit 0) (Note 9) 2, 3)

  • Page 18

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Stop Alarm deactivation Alarm code (Note 8) Process- Stop method Detail Cycling Name Detail name system Alarm ACD3 ACD2 ACD1 ACD0 system (Note (Note 9) reset reset (Bit 3) (Bit 2) (Bit 1) (Bit 0) (Note 9) 2, 3)

  • Page 19

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Note 1. After resolving the source of trouble, cool the equipment for approximately 30 minutes. 2. The following shows three stop methods of DB, EDB, and SD. DB: Stops with dynamic brake. (Coasts for the servo amplifier without dynamic brake.) Coasts for MR-J4-03A6(-RJ) and MR-J4W2-0303B6.

  • Page 20: Warning List

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) 1.3 Warning list Stop Process- Stop Detail method Name Detail name system (Note 2, system (Note 5) (Note 5) 90.1 Home position return incomplete Home position Home position return abnormal return incomplete 90.2 termination warning 90.5...

  • Page 21

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Stop Process- Stop Detail method Name Detail name system (Note 2, system (Note 5) (Note 5) CC-Link IE warning 9E.1 CC-Link IE communication warning Each 9F.1 Low battery axis Battery warning Each 9F.2 Battery degradation warning axis Excessive...

  • Page 22

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Stop Process- Stop Detail method Name Detail name system (Note 2, system (Note 5) (Note 5) Output watt excess Each ED.1 Output watt excess warning warning axis Instantaneous power failure tough Each F0.1 drive warning axis Tough drive warning...

  • Page 23: Remedies For Alarms

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) 1.4 Remedies for alarms When any alarm has occurred, eliminate its cause, ensure safety, and deactivate the alarm before restarting operation. Otherwise, it may cause injury. If [AL. 25 Absolute position erased] occurs, always make home position setting CAUTION again.

  • Page 24

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 10 Name: Undervoltage The voltage of the control circuit power supply has dropped. Alarm content The voltage of the main circuit power supply has dropped. Detail Detail name Cause Check method Check result Action Target...

  • Page 25

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 10 Name: Undervoltage The voltage of the control circuit power supply has dropped. Alarm content The voltage of the main circuit power supply has dropped. Detail Detail name Cause Check method Check result Action Target...

  • Page 26

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 10 Name: Undervoltage The voltage of the control circuit power supply has dropped. Alarm content The voltage of the main circuit power supply has dropped. Detail Detail name Cause Check method Check result Action Target...

  • Page 27

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 11 Name: Switch setting error The setting of the axis selection rotary switch or auxiliary axis number setting switch is incorrect. Alarm content The setting of the disabling control axis switch is incorrect. The setting of the station number selection rotary switch is incorrect.

  • Page 28

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 13 Name: Clock error A part in the servo amplifier is failure. Alarm content A clock error transmitted from the controller occurred. [RJ010]: MR-J3-T10 came off. Detail Detail name Cause Check method Check result Action Target...

  • Page 29

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 14 Name: Control process error The process did not complete within the specified time. Alarm content [RJ010]: MR-J3-T10 came off. [GF]: A part (communication IC) in the servo amplifier is failure. Detail Detail name Cause...

  • Page 30

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 15 Name: Memory error 2 (EEP-ROM) A part (EEP-ROM) in the servo amplifier is failure. Alarm content [RJ010]: MR-J3-T10 came off. Detail Detail name Cause Check method Check result Action Target 15.1 EEP-ROM error (1) EEP-ROM is...

  • Page 31

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 16 Name: Encoder initial communication error 1 Alarm content An error occurred in the communication between an encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 16.1 Encoder initial (1) An encoder cable is...

  • Page 32

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 16 Name: Encoder initial communication error 1 Alarm content An error occurred in the communication between an encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 16.3 Encoder initial (1) An axis not used is not...

  • Page 33

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 16 Name: Encoder initial communication error 1 Alarm content An error occurred in the communication between an encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 16.A Encoder initial (1) The servo amplifier is...

  • Page 34

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 17 Name: Board error Alarm content A part in the servo amplifier is malfunctioning. Detail Detail name Cause Check method Check result Action Target 17.6 Board error 5 (1) The setting value of the Disconnect the cables It is repeatable.

  • Page 35

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 1A Name: Servo motor combination error Alarm content The combination of servo amplifier and servo motor is incorrect. Detail Detail name Cause Check method Check result Action Target 1A.1 Servo motor (1) The servo amplifier and Check the model The combination is...

  • Page 36

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 1E Name: Encoder initial communication error 2 Alarm content An encoder is malfunctioning. Detail Detail name Cause Check method Check result Action Target 1E.1 Encoder (1) An encoder is Replace the servo It is not repeatable.

  • Page 37

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 20 Name: Encoder normal communication error 1 Alarm content An error occurred in the communication between an encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 20.1 Encoder (1) An encoder cable is...

  • Page 38

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 20 Name: Encoder normal communication error 1 Alarm content An error occurred in the communication between an encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 20.5 Encoder (1) When you use an...

  • Page 39

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 20 Name: Encoder normal communication error 1 Alarm content An error occurred in the communication between an encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 20.9 Encoder Check it with the check method for [AL.

  • Page 40

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 21 Name: Encoder normal communication error 2 Alarm content The encoder detected an error signal. Detail Detail name Cause Check method Check result Action Target 21.5 Encoder Check it with the check method for [AL. 21.2]. hardware error 21.6 Encoder...

  • Page 41

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 24 Name: Main circuit error A ground fault occurred on the servo motor power lines. Alarm content A ground fault occurred at the servo motor. Power supply voltage for inverter circuit control is low. (Only for MR-J4W2-0303B6) Detail Detail name Cause...

  • Page 42

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 25 Name: Absolute position erased The absolute position data is faulty. Power was switched on for the first time in the absolute position detection system. Alarm content After the scale measurement encoder was set to the absolute position detection system, the power was switched on for the first time.

  • Page 43

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 25 Name: Absolute position erased The absolute position data is faulty. Power was switched on for the first time in the absolute position detection system. Alarm content After the scale measurement encoder was set to the absolute position detection system, the power was switched on for the first time.

  • Page 44

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 25 Name: Absolute position erased The absolute position data is faulty. Power was switched on for the first time in the absolute position detection system. Alarm content After the scale measurement encoder was set to the absolute position detection system, the power was switched on for the first time.

  • Page 45

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 27 Name: Initial magnetic pole detection error Alarm content The initial magnetic pole detection was not completed properly. Detail Detail name Cause Check method Check result Action Target 27.1 Magnetic pole (1) A moving part collided Check if it collided.

  • Page 46

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 27 Name: Initial magnetic pole detection error Alarm content The initial magnetic pole detection was not completed properly. Detail Detail name Cause Check method Check result Action Target 27.3 Magnetic pole (1) Both of the limit Check the limit Both of them are off.

  • Page 47

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 2A Name: Linear encoder error 1 An error of the linear encoder was detected. (The details vary depending on the linear encoder Alarm content manufacturer.) Detail Detail name Cause Check method Check result Action Target...

  • Page 48

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 30 Name: Regenerative error Permissible regenerative power of the built-in regenerative resistor or regenerative option is exceeded. Alarm content A regenerative transistor in the servo amplifier is malfunctioning. Detail Detail name Cause Check method Check result...

  • Page 49

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 30 Name: Regenerative error Permissible regenerative power of the built-in regenerative resistor or regenerative option is exceeded. Alarm content A regenerative transistor in the servo amplifier is malfunctioning. Detail Detail name Cause Check method Check result...

  • Page 50

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 31 Name: Overspeed The servo motor seed has exceeded the permissible instantaneous speed. Alarm content The linear servo motor seed has exceeded the permissible instantaneous speed. Detail Detail name Cause Check method Check result Action Target...

  • Page 51

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 32 Name: Overcurrent Alarm content A current higher than the permissible current was applied to the servo amplifier. Detail Detail name Cause Check method Check result Action Target 32.1 Overcurrent (7) Something near the Check the noise, It has a failure.

  • Page 52

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 33 Name: Overvoltage The value of the bus voltage exceeded the prescribed value. 200 V class: 400 V DC 400 V class: 800 V DC Alarm content 100 V class: 400 V DC 48 V DC setting: 75 V DC 24 V DC setting: 55 V DC Detail...

  • Page 53

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 34 Name: SSCNET receive error 1 Alarm content An error occurred in SSCNET III/H communication. (continuous communication error with 3.5 ms interval) Detail Detail name Cause Check method Check result Action Target 34.1 SSCNET...

  • Page 54

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 35 Name: Command frequency error Alarm content Input pulse frequency of command pulse is too high. Detail Detail name Cause Check method Check result Action Target 35.1 Command (1) The command pulse Check the command The command pulse Check operation...

  • Page 55

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 36 Name: SSCNET receive error 2 An error occurred in SSCNET III/H communication. (intermittent communication error with about 70 ms Alarm content interval) Detail Detail name Cause Check method Check result Action Target 36.1...

  • Page 56

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 37 Name: Parameter error Parameter setting is incorrect. Alarm content Point table setting is incorrect. Detail Detail name Cause Check method Check result Action Target 37.1 Parameter (1) A parameter was set Check the parameter It is out of setting Set it within the...

  • Page 57

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 39 Name: Program error Alarm content A program used for the program operation is incorrect. Detail Detail name Cause Check method Check result Action Target 39.1 Program error (1) A checksum of the Check if an error It has a failure.

  • Page 58

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 3D Name: Parameter setting error for driver communication Alarm content The control parameter setting value for driver communication is incorrect. Detail Detail name Cause Check method Check result Action Target 3D.1 Parameter (1) The master transmit Check the settings of...

  • Page 59

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 42 Name: Servo control error (for linear servo motor and direct drive motor) Alarm content A servo control error occurred. Detail Detail name Cause Check method Check result Action Target 42.1 Servo control (1) The linear encoder Check the setting of...

  • Page 60

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 42 Name: Servo control error (for linear servo motor and direct drive motor) Alarm content A servo control error occurred. Detail Detail name Cause Check method Check result Action Target 42.3 Servo control (1) The linear encoder Check the setting of...

  • Page 61

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 42 Name: Fully closed loop control error detection (during fully closed loop control) Alarm content A fully closed loop control error has occurred. Detail Detail name Cause Check method Check result Action Target 42.9...

  • Page 62

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 46 Name: Servo motor overheat Alarm content The servo motor overheated. Detail Detail name Cause Check method Check result Action Target 46.1 Abnormal (1) Ambient temperature of Check the ambient It is over 40 ˚C. Lower the ambient temperature of the servo motor has...

  • Page 63

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 47 Name: Cooling fan error The speed of the servo amplifier cooling fan decreased. Alarm content Or the fan speed decreased to the alarm occurrence level or less. Detail Detail name Cause Check method Check result...

  • Page 64

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 50 Name: Overload 1 Alarm content Load exceeded overload protection characteristic of servo amplifier. Detail Detail name Cause Check method Check result Action Target 50.2 Thermal Check it with the check method for [AL. 50.1]. overload error 2 during operation...

  • Page 65

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 51 Name: Overload 2 Alarm content Maximum output current flowed continuously due to machine collision or the like. Detail Detail name Cause Check method Check result Action Target 51.1 Thermal (1) The servo motor power Check the servo It is disconnected.

  • Page 66

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 52 Name: Error excessive Alarm content Droop pulses have exceeded the alarm occurrence level. Detail Detail name Cause Check method Check result Action Target 52.1 Excess droop (1) The servo motor power Check the servo motor It is disconnected.

  • Page 67

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 52 Name: Error excessive Alarm content Droop pulses have exceeded the alarm occurrence level. Detail Detail name Cause Check method Check result Action Target 52.1 Excess droop (12) Servo motor shaft was Measure the actual It is rotated by Review the machine.

  • Page 68

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 56 Name: Forced stop error Alarm content The servo motor does not decelerate normally during forced stop deceleration. Detail Detail name Cause Check method Check result Action Target 56.2 Over speed (1) The forced stop Increase the It is not repeatable.

  • Page 69

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 63 Name: STO timing error Alarm content STO input signal turns off while the servo motor is rotating. Detail Detail name Cause Check method Check result Action Target 63.1 STO1 off (1) STO1 was turned off Check if STO1 is off It is off (enabled).

  • Page 70

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 65 Name: Functional safety unit connection error Alarm content Communication or signal between a functional safety unit and servo amplifier failed. Detail Detail name Cause Check method Check result Action Target 65.1 Functional (1) The functional safety...

  • Page 71

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 66 Name: Encoder initial communication error (safety observation function) The connected encoder is not compatible with the servo amplifier. Alarm content An error has occurred in the communication between an encoder and servo amplifier. Detail Detail name Cause...

  • Page 72

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 67 Name: Encoder normal communication error 1 (safety observation function) Alarm content An error has occurred in the communication between an encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target...

  • Page 73

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 68 Name: STO diagnosis error Alarm content An error of STO input signal was detected. Detail Detail name Cause Check method Check result Action Target 68.1 Mismatched (1) STO1 and STO2 are Check if the STO1 It is not wired Wire it correctly.

  • Page 74

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 69 Name: Command error The command position exceeded 32 bits (-2147483648 to 2147483647) when the software limit is activated. The command position exceeded 30 bits (-536870912 to 536870911) from the value that was set when the software limit was activated.

  • Page 75

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 69 Name: Command error The command position exceeded 32 bits (-2147483648 to 2147483647) when the software limit is activated. The command position exceeded 30 bits (-536870912 to 536870911) from the value that was set when the software limit was activated.

  • Page 76

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 70 Name: Load-side encoder initial communication error 1 Alarm content An error occurred in the communication between the load-side encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 70.1...

  • Page 77

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 70 Name: Load-side encoder initial communication error 1 Alarm content An error occurred in the communication between the load-side encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 70.3...

  • Page 78

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 70 Name: Load-side encoder initial communication error 1 Alarm content An error occurred in the initial communication between the load-side encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 70.5...

  • Page 79

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 70 Name: Load-side encoder initial communication error 1 Alarm content An error occurred in the initial communication between the load-side encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 70.B...

  • Page 80

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 71 Name: Load-side encoder normal communication error 1 Alarm content An error occurred in the communication between the load-side encoder and servo amplifier. Detail Detail name Cause Check method Check result Action Target 71.2...

  • Page 81

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 72 Name: Load-side encoder normal communication error 2 Alarm content The load-side encoder detected an error signal. Detail Detail name Cause Check method Check result Action Target 72.2 Load-side (1) A load-side encoder is Replace the load-side It is not repeatable.

  • Page 82

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 75 Name: Option card error 2 Alarm content MR-J3-T10 came off. Detail Detail name Cause Check method Check result Action Target 75.3 Option card (1) MR-J3-T10 came off. Check if the MR-J3- It is not mounted Install it correctly.

  • Page 83

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 79 Name: Functional safety unit diagnosis error Alarm content A diagnosis of the functional safety unit failed. Detail Detail name Cause Check method Check result Action Target 79.3 Abnormal (1) Ambient temperature Check the ambient It is over 55 ˚C.

  • Page 84

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 79 Name: Functional safety unit diagnosis error Alarm content A diagnosis of the functional safety unit failed. Detail Detail name Cause Check method Check result Action Target 79.6 Output device (1) A signal of an output Check if the output It has a failure.

  • Page 85

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 79 Name: Functional safety unit diagnosis error Alarm content A diagnosis of the functional safety unit failed. Detail Detail name Cause Check method Check result Action Target 79.8 Position (1) The position feedback Check the [Pr.

  • Page 86

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 7A Name: Parameter setting error (safety observation function) Alarm content A parameter of the functional safety unit failed. Detail Detail name Cause Check method Check result Action Target 7A.4 Functional (1) A combination of Check if correct A different servo Return to the servo...

  • Page 87

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 7C Name: Functional safety unit communication diagnosis error (safety observation function) Alarm content The network communication had an error in the functional safety unit. Detail Detail name Cause Check method Check result Action Target 7C.1...

  • Page 88

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 7D Name: Safety observation error Alarm content The safety observation function detected an error. Detail Detail name Cause Check method Check result Action Target 7D.1 Stop (1) During activation of Check that the actual The travel distance Review the alarm observation...

  • Page 89

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 7D Name: Safety observation error Alarm content The safety observation function detected an error. Detail Detail name Cause Check method Check result Action Target 7D.2 Speed (1) The command pulse Check the command The command pulse Check operation observation...

  • Page 90

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 84 Name: Network module initialization error The network module is not connected. Alarm content An error occurred at initialization of the network module. Detail Detail name Cause Check method Check result Action Target 84.1...

  • Page 91

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 84 Name: Network module initialization error The network module is not connected. Alarm content An error occurred at initialization of the network module. Detail Detail name Cause Check method Check result Action Target 84.2...

  • Page 92

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 85 Name: Network module error The network module was disconnected. Alarm content An error occurred in the network module. (Refer to section 1.7.) Detail Detail name Cause Check method Check result Action Target 85.1...

  • Page 93

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 86 Name: Network communication error An error occurred in the network module. Alarm content An error occurred in the network communication. Detail Detail name Cause Check method Check result Action Target 86.1 Network (1) The network module...

  • Page 94

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Name: USB communication time-out error/serial communication time-out error/Modbus-RTU communication Alarm No.: 8A time-out error Communication between the servo amplifier and a personal computer/controller stopped for the specified time or longer. Alarm content An error occurred in USB communication, serial communication (Mitsubishi general-purpose AC servo protocol), or Modbus-RTU communication.

  • Page 95

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 8D Name: CC-Link IE communication error MR-J3-T10 came off. Alarm content An error occurred in CC-Link IE communication. Detail Detail name Cause Check method Check result Action Target 8D.1 CC-Link IE (1) The MR-J3-T10 came Check if [AL.

  • Page 96

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 8D Name: CC-Link IE communication error MR-J3-T10 came off. Alarm content An error occurred in CC-Link IE communication. Detail Detail name Cause Check method Check result Action Target 8D.5 Master station (1) A reserved station has Check if a reserved It is selected.

  • Page 97

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 8E Name: USB communication error/serial communication error/Modbus-RTU communication error A communication error occurred between the servo amplifier and a personal computer/controller. Alarm content An error occurred in USB communication, serial communication (Mitsubishi general-purpose AC servo protocol), or Modbus-RTU communication.

  • Page 98

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 8E Name: USB communication error/serial communication error/Modbus-RTU communication error A communication error occurred between the servo amplifier and a personal computer/controller. Alarm content An error occurred in USB communication, serial communication (Mitsubishi general-purpose AC servo protocol), or Modbus-RTU communication.

  • Page 99: Remedies For Warnings

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) 1.5 Remedies for warnings If [AL. E3 Absolute position counter warning] occurs, remove the cause of the CAUTION warning, and always make home position setting again. Otherwise, it may cause an unexpected operation. POINT When any of the following alarms has occurred, do not cycle the power of the servo amplifier repeatedly to restart.

  • Page 100

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) If [AL. E6], [AL. E7], [AL. E9], [AL. EA], or [AL. EB] occurs, the amplifier will be the servo-off status. If any other warning occurs, operation can be continued but an alarm may take place or proper operation may not be performed.

  • Page 101

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 90 Name: Home position return incomplete warning Alarm content A home position return did not complete normally with the positioning function. Detail Detail name Cause Check method Check result Action Target 90.1 Home position (5) A software stroke...

  • Page 102

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 90 Name: Home position return incomplete warning Alarm content A home position return did not complete normally with the positioning function. Detail Detail name Cause Check method Check result Action Target 90.2 Home position (1) The proximity dog is...

  • Page 103

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 92 Name: Battery cable disconnection warning Alarm content Battery voltage for absolute position detection system decreased. Detail Detail name Cause Check method Check result Action Target 92.1 Encoder (1) 1) When an MR- Check if the battery is It is not connected.

  • Page 104

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 95 Name: STO warning STO input signal turns off while the servo motor stops. Alarm content A diagnosis of input devices was not executed. The safety observation function was enabled in the test mode. Detail Detail name Cause...

  • Page 105

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 95 Name: STO warning STO input signal turns off while the servo motor stops. Alarm content A diagnosis of input devices was not executed. The safety observation function was enabled in the test mode. Detail Detail name Cause...

  • Page 106

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 96 Name: Home position setting warning Alarm content Home position setting could not be made. Detail Detail name Cause Check method Check result Action Target 96.1 In-position (1) INP (In-position) did not Check the droop It is In-position Adjust gains to set...

  • Page 107

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 98 Name: Software limit warning Alarm content A software limit set with the parameter was reached for the positioning function. Detail Detail name Cause Check method Check result Action Target 98.1 Forward (1) A software limit was set Check if the parameter...

  • Page 108

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 9A Name: Optional unit input data error warning Alarm content The BCD input data setting is incorrect when MR-D01 extension IO unit is connected. Detail Detail name Cause Check method Check result Action Target 9A.1...

  • Page 109

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 9B Name: Error excessive warning Alarm content Droop pulses have exceeded the warning occurrence level. Detail Detail name Cause Check method Check result Action Target 9B.1 Excess droop (9) The position loop gain Increase the position It is not repeatable.

  • Page 110

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: 9E Name: CC-Link IE warning 2 Alarm content The receive data of the CC-Link IE communication is abnormal. Detail Detail name Cause Check method Check result Action Target 9E.1 CC-Link IE (1) The transmission Check the noise, It has a failure.

  • Page 111

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: E0 Name: Excessive regeneration warning There is a possibility that regenerative power may exceed permissible regenerative power of built-in Alarm content regenerative resistor or regenerative option. Detail Detail name Cause Check method Check result Action Target...

  • Page 112

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: E2 Name: Servo motor overheat warning Alarm content [AL. 46.2 Abnormal temperature of servo motor 2] can occur. Detail Detail name Cause Check method Check result Action Target E2.1 Servo motor (1) The temperature of the Check it with the check method for [AL.

  • Page 113

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: E4 Name: Parameter warning Alarm content Out of the setting range was attempted to write during parameter writing. Detail Detail name Cause Check method Check result Action Target E4.1 Parameter (1) A parameter was set to Check the parameter It is out of setting Set it within the...

  • Page 114

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: E7 Name: Controller forced stop warning Alarm content The forced stop signal of the servo system controller was enabled. Detail Detail name Cause Check method Check result Action Target E7.1 Controller (1) The forced stop signal Check if the servo It is the forced stop...

  • Page 115

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: E9 Name: Main circuit off warning The servo-on command was inputted with main circuit power supply off. Alarm content The bus voltage dropped during the servo motor driving under 50 r/min. Detail Detail name Cause...

  • Page 116

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: EA Name: ABS servo-on warning Alarm content The servo-on was not enabled within 1 s after ABSM (ABS transfer mode) was turned on. Detail Detail name Cause Check method Check result Action Target EA.1...

  • Page 117

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: F0 Name: Tough drive warning Alarm content Tough drive function was activated. Detail Detail name Cause Check method Check result Action Target F0.1 Instantaneous (1) The voltage of the Check it with the check method for [AL. 10.1]. power failure control circuit power tough drive...

  • Page 118

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: F4 Name: Positioning warning Alarm content Target position or acceleration time constant/deceleration time constant was set out of setting range. Detail Detail name Cause Check method Check result Action Target F4.4 Target position (1) A target position was Check the setting...

  • Page 119

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: F5 Name: Simple cam function - Cam data miswriting warning Alarm content The cam data written by MR Configurator2 is not written to a Flash-ROM. Detail Detail name Cause Check method Check result Action Target...

  • Page 120

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: F6 Name: Simple cam function - Cam control warning The cam axis position restoration at a time of cam control start was a failure. Alarm content The cam control is not normal. Detail Detail name Cause...

  • Page 121

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: F6 Name: Simple cam function - Cam control warning The cam axis position restoration at a time of cam control start was a failure. Alarm content The cam control is not normal. Detail Detail name Cause...

  • Page 122

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Alarm No.: F7 Name: Machine diagnosis warning Alarm content There is a possibility that the equipment connected with the servo motor is malfunctioning. Detail Detail name Cause Check method Check result Action Target F7.1 Vibration failure (1) The servo system is...

  • Page 123: Trouble Which Does Not Trigger Alarm/warning

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) 1.6 Trouble which does not trigger alarm/warning POINT When the servo amplifier, servo motor, or encoder malfunctions, the following status may occur. The following example shows possible causes which do not trigger alarm or warning. Remove each cause referring to this section.

  • Page 124

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target The display shows "Ab". Connection to MR-J4W3-_B Check if the communication Use them with 0.444 ms or [WB] with software version A2 or cycle on servo system more communication cycle.

  • Page 125

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target The display shows "b##". Test operation mode has Test operation setting switch Turn off the test operation (Note) been enabled. is turned on. setting switch. [WB] [RJ010] The system has been in the Check if the servo ready...

  • Page 126

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target The servo motor does not The setting of the torque limit Check if the torque limit is Set it correctly. operate. is incorrect. "0". [WB] [A]: [Pr. PA11] and [Pr. [RJ010] PA12], or analog input [GF]...

  • Page 127

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target The servo motor does not The ABS transfer mode is Check if ABSM is on. Turn off ABSM. operate. selected when the absolute position detection system is used.

  • Page 128

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target The speed of the servo motor The selection of SP1 (Speed Check SP1 (Speed selection Review the settings of SP1 or linear servo motor is not selection 1), SP2 (Speed 1), SP2 (Speed selection 2), (Speed selection 1), SP2...

  • Page 129

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target An unusual noise is The servo gain is low. Or the Check if the trouble is solved Adjust gains. occurring at the servo motor. response of auto tuning is by increasing auto tuning low.

  • Page 130

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target The rotation accuracy is low. The servo gain is low. Or the Check if the trouble is solved Adjust gains. response of auto tuning is by increasing auto tuning (The speed is unstable.) low.

  • Page 131

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target Home position deviates at For the dog type home Check if a fixed amount (in Adjust the dog position. home position return. position return, the point one revolution) deviates.

  • Page 132

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target Frequency of the pulse train Check the pulse train Review the pulse train The position deviates during command is too high. command frequency is within command frequency. Select operation after home position the range of specifications.

  • Page 133

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target A restoration position The motor was rotated Check if the motor was Extend the acceleration time. [A] deviates at restoration of exceeding the maximum accelerated suddenly to power for the absolute permissible speed at power 6000 r/min by an external...

  • Page 134

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target For a servo motor with an The electromagnetic brake is Remove the servo motor and Replace the servo motor. electromagnetic brake, the failure due to its life. For the all wirings from the machine brake went out.

  • Page 135

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) Description Possible cause Check result Action Target Modbus-RTU communication The servo amplifier is not set Check if "communication Select Modbus-RTU protocol. [A] is not established. to Modbus-RTU protocol selection" in [Pr. communication protocol. PC71] is correctly set.

  • Page 136: Network Module Error Codes

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) 1.7 Network module error codes If an error occurs in the network module, a network module error code will be displayed in "Alarm Display" of MR Configurator2. For details of the network module error codes, refer to "Exception Codes" of "Anybus CompactCom 40 Software Design Guide (Doc.Id.

  • Page 137

    1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT) MEMO 1 - 130...

  • Page 138: Troubleshooting For Mr-cv_power Regeneration Converter Unit

    2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT 2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT When an error occurs during operation, the corresponding alarm or warning is displayed. When an alarm or a warning is displayed, refer to section 2.4 to remove the failure. When an alarm occurs, ALM (Malfunction) will turn off.

  • Page 139: Warning List

    2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT 2.3 Warning list Name Instantaneous power failure warning External forced stop warning Excessive regeneration warning Overload warning Cooling fan speed reduction warning 2.4 Remedies for alarms Name/Description Cause Check method Check result Action Overcurrent (1) The combination of AC Check if the correct...

  • Page 140

    2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action Frequency error (1) The frequency of the Check if the normal It is out of range. Check the power input power supply is power supply voltage supply.

  • Page 141

    2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action MC drive circuit (1) The setting value of the Check the setting of The setting or wiring Check the setting of error rotary switch for the rotary switch and constitution is the rotary switch or magnetic contactor...

  • Page 142

    2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action Undervoltage (1) The power supply Check the power It has a failure. Wire it correctly. wiring is incorrect. supply wiring. The power supply It has no failure. Check (2).

  • Page 143

    2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action Switch setting error (1) The setting of the Check the setting of The setting is Set it correctly. rotary switch is the rotary switch. incorrect. The setting of the incorrect.

  • Page 144: Remedies For Warnings

    2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT 2.5 Remedies for warnings Name/Description Cause Check method Check result Action Instantaneous (1) An instantaneous power Check if the power It has a problem. Review the power. power failure failure has occurred for has a problem.

  • Page 145

    2. TROUBLESHOOTING FOR MR-CV_POWER REGENERATION CONVERTER UNIT MEMO 2 - 8...

  • Page 146: Troubleshooting For Mr-cr55k(4) Resistance Regeneration Converter Unit

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT 3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT POINT [AL. 37 Parameter error] and warnings are not recorded in the alarm history. When an error occurs during operation, the corresponding alarm or warning is displayed. If any alarm has occurred, refer to section 3.3 and take the appropriate action.

  • Page 147: Remedies For Alarms

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT 3.3 Remedies for alarms When any alarm has occurred, eliminate its cause, ensure safety, and deactivate CAUTION the alarm before restarting operation. Otherwise, it may cause injury. POINT When any of the following alarms has occurred, do not deactivate the alarm repeatedly to restart.

  • Page 148

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action Undervoltage (1) The control circuit Check the control It has a failure. Wire it correctly. power supply wiring is circuit power supply The voltage of the It has no failure.

  • Page 149

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action Memory error 3 (1) The Flash-ROM is Disconnect the cables It is repeatable. Replace the (Flash-ROM) malfunctioning. except for the control resistance circuit power supply, regeneration A part (Flash- and then check the...

  • Page 150

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action Regenerative error (8) A regenerative Remove the The alarm occurs. Replace the transistor in the regenerative resistor resistance Permissible resistance regeneration (regenerative option) regeneration regenerative converter unit is and then check if the converter unit.

  • Page 151

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action Parameter error (1) A parameter was set Check the parameter It is out of setting Set it within the out of setting range. setting. range. range.

  • Page 152

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action Inrush current (1) Turning on and off of Check if the inrush It is turned on and Check operation suppression circuit the inrush relay were relay is turned on and off.

  • Page 153: Remedies For Warnings

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT 3.4 Remedies for warnings POINT When any of the following warnings has occurred, do not cycle the power of the resistance regeneration converter unit repeatedly to restart. Doing so will cause a malfunction of the resistance regeneration converter unit, drive unit and servo motor.

  • Page 154

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT Name/Description Cause Check method Check result Action Converter overheat (1) Operated in the Check the effective The effective load Check operation warning overloaded status. load ratio. ratio is high. pattern. The temperature The effective load Check (2).

  • Page 155

    3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT MEMO 3 - 10...

  • Page 156: Drive Recorder

    4. DRIVE RECORDER 4. DRIVE RECORDER 4.1 How to use drive recorder POINT When you use the J3 extension function, replace the following left parameters to the right parameters. [Pr. PF21] → [Pr. PX30] [Pr. PA23] → [Pr. PX29] The drive recorder will not operate on the following conditions. You are using the graph function of MR Configurator2.

  • Page 157

    4. DRIVE RECORDER (1) Trigger setting of drive recorder When you operate the drive recorder only for any alarms, set "Drive recorder arbitrary alarm trigger setting" ([Pr. PA23]). For settings, refer to explanation for [Pr. PA23] of each instruction manual. When the setting value is "0 0 0 0"...

  • Page 158

    4. DRIVE RECORDER Table 4.1 MR-J4-_B_(-RJ), MR-J4-_B_-RJ010, or MR-J4W_-_B Measure- Sampling Data 1 Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 Data 8 ment time time [ms] [ms] Analog Motor Torque Current Droop Speed Effective 0.888 speed command pulses...

  • Page 159

    4. DRIVE RECORDER Measure- Sampling Data 1 Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 Data 8 ment time time [ms] [ms] Analog Motor Torque Current Droop Speed Error speed command pulses command voltage excessive (100 alarm AL.

  • Page 160

    4. DRIVE RECORDER Table 4.2 MR-J4-_A_(-RJ) Measure- Sampling Data 1 Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 Data 8 ment time time [ms] [ms] Analog Motor Torque Current Droop Speed Effective 0.888 speed command pulses command voltage load ratio...

  • Page 161

    4. DRIVE RECORDER Measure- Sampling Data 1 Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 Data 8 ment time time [ms] [ms] Analog Motor Torque Current Droop Speed Error speed command pulses command voltage excessive (100 alarm AL.

  • Page 162

    4. DRIVE RECORDER Table 4.3 MR-J4-_GF_(-RJ) Measure- Sampling Data 1 Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 Data 8 ment time time [ms] [ms] Analog Motor Torque Current Droop Speed Effective 0.888 speed command pulses command voltage load ratio...

  • Page 163

    4. DRIVE RECORDER Table 4.4 Signal explanations Signal name Description Unit Motor speed The servo motor speed is displayed. [r/min] Torque The servo motor torque is displayed with current value. [0.1%] The value of torque being occurred is displayed in real time considering a rated torque as 100%.

  • Page 164

    4. DRIVE RECORDER Signal name Description Unit CSON This indicates status of the servo-on signal from the controller. This Indicates the SON status of the external input signal. This indicates status of the emergency stop input. EM2/EM1 This Indicates the EM2/EM1 status of the external input signal. ALM2 This will turn on when an alarm is detected in the servo amplifier.

  • Page 165: How To Display Drive Recorder Information

    4. DRIVE RECORDER 4.2 How to display drive recorder information Select "Diagnosis" and "Drive Recorder" from the menu bar of MR Configurator2. The window shown in the right hand image will be displayed. (a) Click "Waveform" - "Display" to display the graph preview window which shows data before and after alarm occurrence.

  • Page 166: Appendix

    APPENDIX APPENDIX App. 1 Detection points of [AL. 25], [AL. 92], and [AL. 9F] The following diagram shows detection points of [AL. 25 Absolute position erased], [AL. 92 Battery cable disconnection warning], and [AL. 9F Battery warning]. Servo amplifier Servo motor encoder [AL.

  • Page 167

    REVISIONS *The manual number is given on the bottom left of the back cover. Revision Date *Manual Number Revision Mar. 2012 SH(NA)030109ENG-A First edition Jun. 2012 SH(NA)030109ENG-B Section 1.1 [AL. 1E.2] is added. [AL. 1F.2] is added. [AL. 42.8] is added. [AL.

  • Page 168

    Revision Date *Manual Number Revision Oct. 2013 SH(NA)030109ENG-E Section 1.2 [AL. 25.1] The part of table is changed. [AL. 25.2] The part of table is changed. Section 1.3 [AL. 92.1] The part of table is changed. [AL. 9F.1] The part of table is changed. Mar.

  • Page 169

    Revision Date *Manual Number Revision Sep. 2014 SH(NA)030109ENG-H Section 1.4 [AL. 21.1] is partially changed. [AL. 21.2] is partially changed. [AL. 21.4] is partially changed. [AL. 2A.1] is partially changed. [AL. 2B.1] is partially changed. [AL. 31.1] is partially changed. [AL.

  • Page 170

    This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may occur as a result of using the contents noted in this manual.

  • Page 171

    MEMO...

  • Page 172

    Mitsubishi Electric Co., Ltd. Tel : +81-3-3218-2111 Tokyo Building, 2-7-3, Marunouchi, Chiyoda-ku, Tokyo 100-8310, Japan MELSERVO and CC-Link IE are trademarks or registered trademarks of Mitsubishi Electric Corporation in Japan and/or other countries. Modbus is registered trademark of SCHNEIDER ELECTRIC USA, INC.

  • Page 173

    Warranty 1. Warranty period and coverage We will repair any failure or defect hereinafter referred to as "failure" in our FA equipment hereinafter referred to as the "Product" arisen during warranty period at no charge due to causes for which we are responsible through the distributor from which you purchased the Product or our service provider.

  • Page 174

    MR-J4 INSTRUCTIONMANUAL MODEL (TROUBLESHOOTING) MODEL 1CW808 CODE HEAD OFFICE : TOKYO BLDG MARUNOUCHI TOKYO 100-8310 This Instruction Manual uses recycled paper. SH(NA)030109ENG-M(1612)MEE Printed in Japan Specifications are subject to change without notice.

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