Mitsubishi Electric Melservo-J4 Instruction Manual page 18

Alarm Detail
No. Name No.
50 Overload 1 50.1
50.2
50.3
50.4
50.5
50.6
51 Overload 2 51.1
51.2
52 Error 52.1
excessive
52.3
52.4
52.5
52.6
54 Oscillation 54.1
detection
56 Forced stop 56.2
error
56.3
56.4
61 Operation error 61.1
63 STO timing 63.1
error
63.2
63.5
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
16
1.2 Alarm list
Stop Alarm deactivation
method
Name Alarm
*2*3
reset

Thermal SD
overload error 1
during operation

Thermal SD
overload error 2
during operation

Thermal SD
overload error 4
during operation

Thermal SD
overload error 1
during a stop
Thermal SD 
overload error 2
during a stop
Thermal SD 
overload error 4
during a stop

Thermal DB
overload error 3
during operation

Thermal DB
overload error 3
during a stop

Excess droop SD
pulse 1

Excess droop SD
pulse 2
Error excessive SD 
during 0 torque
limit

Excess droop EDB
pulse 3
Excess droop SD 
pulse during
servo-off
Oscillation EDB 
detection error
Over speed EDB 
during forced
stop
Estimated EDB 
distance over
during forced
stop

Forced stop EDB
start error

Point table DB
setting range
error

STO1 off DB
STO2 off DB 

STO by DB
functional safety
unit
Process
ing
CPU Cycling
system
reset the
*9
power
*1 *1 *1
 
Each axis
*1 *1 *1
 
Each axis
*1 *1 *1
 
Each axis
*1 *1 *1
 
Each axis
*1 *1 *1
  Each axis
*1 *1 *1
  Each axis
*1 *1 *1
 
Each axis
*1 *1 *1
 
Each axis
 
Each axis
 
Each axis
  Each axis
 
Each axis
  Each axis
  Each axis
  Each axis
  Each axis
 
Each axis
  
 
Common
  Common
  
*8
Stop Alarm code
system
ACD3 ACD2 ACD1
*9
(Bit 3) (Bit 2) (Bit 1)
Each 0 0 1
axis
Each
axis
Each
axis
Each
axis
Each
axis
Each
axis
Each 0 0 1
axis
Each
axis
Each 0 1 0
axis
Each
axis
Each
axis
Each
axis
Each
axis
Each 0 0 1
axis
Each 0 1 1
axis
Each
axis
Each
axis

0 1 0
All axes 0 1 1
All axes

ACD0
(Bit 0)
1
1
1
1
0
1
0