1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 37
Alarm No.: 25
Name: Absolute position erased
Alarm content
The absolute position data is faulty.
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
No.
Detail name
Cause
Check method
Check result
Action
Target
25.2 Scale
measurement
encoder -
Absolute
position erased
(1) After the scale
measurement encoder
was set to the absolute
position detection
system, the power was
switched on for the first
time.
Check if this is the
first time to switch on
the power after the
scale measurement
encoder was set to
the absolute position
detection system.
This is the first time. Check that the
battery is mounted
correctly, and make
home position return.
[B]
[WB]
[GF]
This is not the first
time.
Check (2).
(2) The battery was
removed (replaced)
when the control circuit
power supply was off.
Check if the battery
was removed when
the control circuit
power supply was off.
It was removed.
Check that the
battery is mounted
correctly, and make
home position return.
It was not removed. Check (3).
(3) The power was turned
off with the battery
disconnected from
CN4.
Check if the power
was turned off in this
state.
It was turned off.
Check that the
battery is mounted
correctly, and make
home position return.
It was not turned off. Check (4).
(4) The battery voltage is
low. The battery is
consumed.
Check the battery
voltage with a tester.
It is less than 3 V
DC.
Replace the battery.
It is 3 V DC or more. Check (5).
(5) The voltage has
dropped greatly in the
encoder cable wired to
the battery.
Check if a
recommended cable
is used for the
encoder cable.
It is not used.
Use a
recommended wire.
It is used.
Check (6).
(6) A battery cable is
malfunctioning.
Check for the loose
connection with a
tester.
It has a failure.
Replace the battery
cable.
It has no failure.
Check (7).
(7) There is a loose
connection of the
encoder cable on the
scale measurement
encoder side.
Check for the loose
connection with a
tester. Measure the
voltage on the scale
measurement
encoder side.
It has a failure.
Repair or replace
the encoder cable.
It has no failure.
Check (8).
(8) The servo amplifier is
malfunctioning.
Replace the servo
amplifier, and then
check the
repeatability.
It is not repeatable.
Replace the servo
amplifier.
It is repeatable.
Check (9).
(9)
The
scale
measurement encoder
is malfunctioning.
Replace the scale
measurement
encoder, and then
check the
repeatability.
It is not repeatable.
Replace the scale
measurement
encoder.
Содержание MELSERVO MR-J4-B-RJ Series
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Страница 137: ...1 TROUBLESHOOTING FOR SERVO AMPLIFIER DRIVE UNIT 1 130 MEMO ...
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