Mitsubishi Electric Melservo-J4 Instruction Manual page 47

Alarm No.: 25 Name: Absolute position erased
 The absolute position data is faulty.
Alarm content
 Power was switched on for the first time in the absolute position detection system.
 After the scale measurement encoder was set to the absolute position detection system, the power was
switched on for the first time.
Detail Detail name Cause
No.
25.1 Servo motor (1) Power was switched on
encoder - for the first time in the
Absolute absolute position
position erased detection system.
(2) 1) When an MR-
2) When an MR-
(3) 1) When an MR-
2) When an MR-
(4) The encoder cable was
disconnected with the
MR-BAT6V1BJ battery
disconnected from MR-
BT6VCBL03M junction
battery cable.
Check method
Check if this is the first
time you switched on the
power in the absolute
position detection
system.
Check if the battery was
BAT6V1SET(-A) removed in this way
battery or MR- when the control circuit
BT6VCASE battery power supply was off.
case was used,
CN4 of the servo
amplifier was
disconnected during
control circuit power
supply off.
BAT6V1BJ battery
for junction battery
cable was used,
both CN4 of the
servo amplifier and
MR-BAT6V1BJ
battery for junction
battery cable were
disconnected from
the MR-
BT6VCBL03M
junction battery
cable.
Check if the power was
BAT6V1SET(-A) turned off in this state.
battery or MR-
BT6VCASE battery
case was used, the
power was turned
off with the battery
disconnected from
CN4.
BAT6V1BJ battery
for junction battery
cable was used, the
power was turned
off with the battery
disconnected from
CN4 and MR-
BT6VCBL03M
junction battery
cable.
Check if the encoder
cable was disconnected
in this state.
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Check result Action
This is the first time. Check that the battery is
mounted correctly, and
make home position
return.
This is not the first time. Check (2).
It was removed. Check that the battery is
mounted correctly, and
make home position
return.
It was not removed. Check (3).
It was turned off. Check that the battery is
mounted correctly, and
make home position
return.
It was not turned off. MR-BAT6V1BJ battery
for junction battery cable:
Refer to (4).
MR-BAT6V1SET(-A)
battery or MR-
BT6VCASE battery case:
Refer to (6).
It was disconnected. Check that the MR-
BAT6V1BJ battery is
connected to CN4 and
MR-BT6VCBL03M
junction battery cable,
and execute a home
position return.
It was not disconnected. Check (5).
1.4 Remedies for alarms
1
Target
[A]
[B]
[WB]
[RJ010]
[GF]
[A]
[B]
[RJ010]
[GF]
45