Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 290

No. Name
8E USB communication error/
serial communication error/
Modbus RTU communication
error
88888 Watchdog
*1 Leave for about 30 minutes of cooling time after removing the cause of occurrence.
*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. Note that EDB is applied when an alarm below occurs;
[AL. 30.1], [AL. 32.2], [AL. 32.4], [AL. 51.1], [AL. 51.2], [AL. 888]
EDB: Electronic dynamic brake stop (available with specified servo motors)
Refer to the following table for the specified servo motors. The stop method for other than the specified servo motors will be DB.
Series
HG-KR
HG-MR
HG-SR
HG-AK
SD: Forced stop deceleration
*3 This is applicable when [Pr. PA04] is set to the initial value. The stop system of SD can be changed to DB using [Pr. PA04].
*4 The alarm can be canceled by setting as follows:
For the fully closed loop control: set [Pr. PE03] to "1 _ _ _".
When a linear servo motor or direct drive motor is used: set [Pr. PL04] to "1 _ _ _".
*5 In some controller communication status, the alarm factor may not be removed.
*6 This alarm will occur only in the J3 compatibility mode.
*7 Reset this while all the safety observation functions are stopped.
*8 In the parallel drive system, the stop method is DB.
8 TROUBLESHOOTING
288
8.2 Alarm list
Detail Detail name
No.
8E.4 USB communication command error/serial
communication command error
8E.5 USB communication data number error/serial
communication data number error
8E.6 Modbus RTU communication receive error
8E.7 Modbus RTU communication message frame error
8E.8 Modbus RTU communication CRC error
8888._ Watchdog
Servo motor
HG-KR053/HG-KR13/HG-KR23/HG-KR43
HG-MR053/HG-MR13/HG-MR23/HG-MR43
HG-SR51/HG-SR52
HG-AK0136/HG-AK0236/HG-AK0336
Stop Alarm deactivation
method
Alarm CPU
*2*3
reset reset
 
SD
 
SD
SD  
 
SD
 
SD
 
DB
Cycling
the
power





