Mitsubishi Electric MELSERVO-J4 Instruction Manual page 118

6. TROUBLESHOOTING
No. Name
Load-side encoder normal
71
communication error 1
Load-side encoder normal
72
communication error 2
USB communication time-
8A
out error
8E USB communication error
888 Watchdog
Note 1. Leave for about 30 minutes of cooling time after removing the cause of occurrence.
2. In some controller communication status, the alarm factor may not be removed.
3. The alarm can be canceled by setting as follows:
For the fully closed loop control: set [Pr. PE03] to "1 _ _ _".
For the linear servo motor: set [Pr. PL04] to "1 _ _ _".
4. Stop method indicates as follows:
DB: Stops with dynamic brake. (Coasts for the servo amplifier without dynamic brake.)
EDB: Stops with electronic dynamic brake for 600 W or less servo amplifiers
Stops with dynamic brake for 700 W or more servo amplifiers
SD: Forced stop deceleration
5. 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].
6. This alarm occurs only in the J3 compatibility mode.
Detail
Detail name
display
Load-side encoder communication - Receive data
71.1
error 1
Load-side encoder communication - Receive data
71.2
error 2
Load-side encoder communication - Receive data
71.3
error 3
Load-side encoder communication - Transmission
71.5
data error 1
Load-side encoder communication - Transmission
71.6
data error 2
Load-side encoder communication - Transmission
71.7
data error 3
Load-side encoder communication - Transmission
71.9
data error 4
Load-side encoder communication - Transmission
71.A
data error 5
72.1 Load-side encoder data error 1
72.2 Load-side encoder data update error
72.3 Load-side encoder data waveform error
72.4 Load-side encoder non-signal error
72.5 Load-side encoder hardware error 1
72.6 Load-side encoder hardware error 2
72.9 Load-side encoder data error 2
8A.1 USB communication time-out 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
88._ Watchdog
6 - 13
Alarm reset
Stop
method
(Note 4,
5)
EDB
EDB
EDB
EDB
EDB
EDB
EDB
EDB
EDB
EDB
EDB
EDB
EDB
EDB
EDB
SD
SD
SD
SD
SD
SD
DB
Operation
mode