Name: Absolute Position Erased - Mitsubishi Electric MELSERVO-JE Instruction Manual

1. SERVO AMPLIFIER TROUBLESHOOTING
Alarm No.: 25

Name: Absolute position erased

Alarm content
Detail
Detail name
No.
25.1 Servo motor (1) Power was switched on
encoder -
Absolute
position erased
(2) The battery was
(3) CN4 of the servo
(4) The power was turned
(5) The battery voltage is
(6) The voltage has
(7) A battery cable is
(8) There is a loose
(9) The servo amplifier is
(10) An encoder is
The absolute position data is faulty.
Power was switched on for the first time in the absolute position detection system.
The battery was replaced.
Cause
Check if this is the
for the first time in the first time you have
absolute position switched on the
detection system. power since the
absolute position
detection system was
set.
Check if the battery
replaced. was replaced.
Check if the battery
amplifier was was disconnected
disconnected during during power-off.
power-off.
Check if the power
off with the battery was turned off in such
disconnected from a state.
CN4.
Check the battery
low. The battery is voltage with a tester.
consumed.
Check if a
dropped considerably recommended wire is
in the encoder cable used for the encoder
wired to the battery. cable.
Check for the loose
malfunctioning. connection with a
tester.
Check for the loose
connection of the connection with a
encoder cable on the tester. Measure the
servo motor side. voltage on the servo
motor side.
Replace the servo
malfunctioning. amplifier, and then
check the
repeatability.
Replace the servo
malfunctioning. motor, and then check
the repeatability.
Check method Check result
This is the first time. Check that the
This is not the first
time.
It was replaced.
It is not replaced.
It was disconnected. Check that the
It was not
disconnected.
It was turned off.
It was not turned off. Check (5).
It is less than 3 V
DC.
It is 3 V DC or more. Check (6).
It is not used.
It is used.
It has a failure.
It has no failure.
It has a failure.
It has no failure.
It is not repeatable.
It is repeatable.
It is not repeatable.
1 - 20
Action Target
[B]
battery is mounted [C]
correctly, and make
a home position
return.
Check (2).
Check that the
battery is mounted
correctly, and make
a home position
return.
Check (3).
battery is mounted
correctly, and make
a home position
return.
Check (4).
Check that the
battery is mounted
correctly, and make
a home position
return.
Replace the battery.
Use a
recommended wire.
Check (7).
Replace the battery
cable.
Check (8).
Repair or replace
the encoder cable.
Check (9).
Replace the servo
amplifier.
Check (10).
Replace the servo
motor.