Trouble At Start-Up - Mitsubishi MR-JE-10A Instruction Manual

4. STARTUP

4.4.6 Trouble at start-up

CAUTION
The following faults may occur at start-up. If any of such faults occurs, take the corresponding action.
No.
Start-up sequence
1
Power on
Alarm occurs.
2
Switch on SON Alarm occurs.
(Servo-on).
Servo motor shaft is
free.
3
Switch on RS1 Servo motor does not
(Forward rotation rotate.
start) or RS2
(Reverse rotation
start).
Never make a drastic adjustment or change to the parameter values as doing so
will make the motion unstable.
POINT
Using the optional MR Configurator2, you can refer to reason for rotation failure,
etc.
Fault
7-segment LED is Not improved even if CN1 and
not lit. CN2 connectors are
disconnected.
7-segment LED
flickers.
Improved when CN1 connector is
disconnected.
Improved when CN2 connector is
disconnected.
Refer to chapter 8 and remove cause.
Refer to chapter 8 and remove cause.
Call the external I/O signal
display (section 4.5.7) and check
the on/off status of the input
signal.
Call the status display (section
4.5.3) and check the input
voltage of TC (Analog torque
command).
Call the external I/O signal
display (section 4.5.7) and check
the on/off status of the input
signal.
Check the internal speed limit 1
to 7 ([Pr. PC05] to [Pr. PC11]).
Check the analog torque
command maximum output ([Pr.
PC13]) value.
Check the forward rotation
torque limit ([Pr. PA11]) and the
reverse rotation torque limit ([Pr.
PA12]).
Investigation
1. Power supply voltage fault
2. The servo amplifier is
malfunctioning.
Power supply of CN1 cabling is
shorted.
1. Power supply of encoder
cabling is shorted.
2. Encoder is malfunctioning.
1. SON (Servo-on) is not input.
(wiring mistake)
2. 24 V DC power is not supplied
to DICOM.
Analog torque command is 0 V.
RS1 and RS2 are off.
Set value is 0.
Torque command level is too low
as compared to the load torque.
Set value is 0.
4 - 16
Possible cause Reference
Chapter 8
Chapter 8
Section
Section
Section
Section
Section
Section
4.5.7
4.5.3
4.5.7
5.2.3
5.2.3
5.2.1