Mitsubishi Electric Melservo-J4 Instruction Manual page 20

Alarm Detail
No. Name No.
66 Encoder initial 66.1
communication
error (safety
observation
function)
66.2
66.3
66.7
66.9
67 Encoder 67.1
normal
communication
error 1 (safety
observation
function)
67.2
67.3
67.4
67.7
68 STO diagnosis 68.1
error
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
18
1.2 Alarm list
Stop Alarm deactivation
method
Name Alarm
*2*3
reset

Encoder initial DB
communication
- Receive data
error 1 (safety
observation
function)

Encoder initial DB
communication
- Receive data
error 2 (safety
observation
function)

Encoder initial DB
communication
- Receive data
error 3 (safety
observation
function)
Encoder initial DB 
communication
- Transmission
data error 1
(safety
observation
function)

Encoder initial DB
communication
- Process error
1 (safety
observation
function)

Encoder normal DB
communication
- Receive data
error 1 (safety
observation
function)
Encoder normal DB 
communication
- Receive data
error 2 (safety
observation
function)

Encoder normal DB
communication
- Receive data
error 3 (safety
observation
function)

Encoder normal DB
communication
- Receive data
error 4 (safety
observation
function)

Encoder normal DB
communication
- Transmission
data error 1
(safety
observation
function)
Mismatched DB 
STO signal error
Process
ing
CPU Cycling
system
reset the
*9
power
  
  
  
  
  
  
  
  
  
  
  Common
*8
Stop Alarm code
system
ACD3 ACD2 ACD1
*9
(Bit 3) (Bit 2) (Bit 1)

0 1 1





0 1 1




Common 0 0 0
ACD0
(Bit 0)
0
0
0