Absolute Position Data Transfer Errors; Corrective Actions - Mitsubishi Electric MELSERVO MR-J2S- A Instruction Manual

15. ABSOLUTE POSITION DETECTION SYSTEM

15.10 Absolute position data transfer errors

15.10.1 Corrective actions

(1) Error list
The number within parentheses in the table indicates the output coil or input contact number of the
A1SD71.
Output coil
Name
AD71 1PG
Y49 Y11 1. The ABS data transfer mode
(Note)
ABS
communication
error
ABS data Y4A Y12
check sum
error
ABS Y4B
coordinate
error
Servo alarm Y48 Y10
Note. Refer to (2) in this section for details of error occurrence definitions.
Description
signal (Y41) is not completed
within 5s.
2. The ready to send signal
(X32) is not turned OFF
within 1s after the ABS data
request signal (Y42) is turned
ON.
3. The ready to send signal
(X32) remains OFF for longer
than 1s.
ABS data sumcheck resulted
in mismatch four times
consecutively.
The motor position is in the
negative coordinate value
range when the servo is
turned ON or when power
supply is turned ON.
Alarm occurred in the servo
amplifier.
Cause
1. Wiring for ABS transfer mode
signal, ABS data request
signal, or ready to send signal
is disconnected or connected to
the SG terminal.
2. PC ladder program wrong.
3. Faulty PLC output or input
module.
4. Faulty printed board in the
servo amplifier.
5. Power supply to the servo
amplifier is OFF.
1. Wiring for the ABS data
signal (ABS bit 0 (PF), bit 1
(ZSP)) is disconnected or
connected to the SG terminal.
2. PC ladder program wrong.
3. Faulty PLC input module.
4. Faulty printed board in the
servo amplifier.
1. The servo is turned ON or the
power supply is turned ON
near the machine home
position or in the zone in
which addresses decrease.
2. The machine falls on a
vertical axis when the servo-
on (SON) is turned ON/OFF.
1. Emergency stop (EMG) of the
servo amplifier was turned
off.
2. Trouble (ALM) of the servo
amplifier was turned on.
15 - 63
Action
Correct the wiring.
Correct the ladder.
Change the input or output
module.
Change the amplifier
Turn on the power to the servo
amplifier.
Correct the wiring.
Correct the ladder.
Change the input module.
Change the amplifier.
1. Reconsider the position
where the servo is turned
ON.
2. Set the home position for
positioning apart from the
machine home position.
Change the electromagnetic
brake operation sequence.
After ensuring safety, turn
EMG on.
Refer to Section 10.2.2 and take
action.