Mitsubishi Electric MR-JE-*C Instruction Manual page 290

12. WHEN USING WITH A GENERAL-PURPOSE INTERFACE
(4) Troubleshooting at start-up
CAUTION
The following faults may occur at start-up. If any of such faults occurs, take the corresponding action.
"MR-JE-_C" means "MR-JE-_C Servo Amplifier Instruction Manual".
No. Start-up sequence
1 Power on
Alarm occurs.
2 SON (Servo-on) on Alarm occurs.
Servo motor shaft is not
servo-locked. (Servo
motor shaft is free.)
3 Perform a home Servo motor does not
position return. rotate.
The home position
return does not get
completed.
4 Switch on ST1 Servo motor does not
(Forward rotation rotate.
start).
Never make a drastic adjustment or change to the parameter values as doing so
will make the operation unstable.
POINT
Using MR Configurator2, you can refer to the reason for rotation failure, etc.
Fault
The 7-segment LED Not solved even if CN2, CN3, and
display does not turn CN5 connectors are disconnected.
on.
The 7-segment LED
Solved when CN2 connector is
display blinks.
disconnected.
Solved when CN3 connector is
disconnected.
Solved when CN5 connector is
disconnected.
(Note)
(Note)
Check SON (Servo-on) status.
Check the status of LSP (Forward
rotation stroke end), LSN (Reverse
rotation stroke end), and ST1
(Forward rotation start).
Check [Pr. PA11 Forward rotation
torque limit] and [Pr. PA12 Reverse
rotation torque limit].
When TLA (Analog torque limit) is
usable, check the input voltage on
MR Configurator2.
Check the ON/OFF status of SIG
(External limit/Rotation direction
decision/Automatic speed
selection).
Check the status of LSP (Forward
rotation stroke end), LSN (Reverse
rotation stroke end), and ST1
(Forward rotation start).
Check [Pr. PA11 Forward rotation
torque limit] and [Pr. PA12
Reverse rotation torque limit].
When TLA (Analog torque limit) is
usable, check the input voltage on
MR Configurator2.
Investigation
1. Power supply voltage fault
2. The servo amplifier is
1. Power supply of encoder
2. Encoder is malfunctioning.
Power supply of CN3 cabling is
shorted.
Power supply of CN5 cabling is
shorted.
1. SON (Servo-on) is not input.
2. 24 V DC power is not supplied
LSP, LSN, and ST1 are off.
Torque limit level is too low for
the load torque.
Torque limit level is too low for
the load torque.
The proximity dog is set
incorrectly.
LSP, LSN, and ST1 are off.
Torque limit level is too low for
the load torque.
Torque limit level is too low for
the load torque.
12 - 75
Possible cause
malfunctioning.
cabling is shorted.
(wiring mistake)
to DICOM.
Reference
Section
4.2.1
Section
4.2.1