Mitsubishi Electric RD77MS2 User Manual page 596

Error code Error name
(Hexadecimal)
1941H Dog detection timing
fault
1944H Count method
movement amount
fault
1945H Home position return
request ON
1946H Home position return
restart not possible
1974H ZCT read error
1975H ABS reference point
read error
1977H Encoder ABS data
not established
1978H Z-phase passing
parameter invalid
197AH Home position return
zero point not
passed
1980H Outside JOG speed
range
14 TROUBLESHOOTING
594
14.5 List of Error Codes
Error details and causes
The near-point dog signal is turned OFF during the
deceleration from a home position return speed to a
creep speed by the near-point dog method machine
home position return.
[Operation status at error occurrence]
The system stops with the setting (deceleration stop/
sudden stop) of the detailed parameter 2 Sudden stop
selection (stop group 3). (Note that the deceleration
stop only occurs during the manual pulse generator
operation.)
In the count method 1 and 2 machine home position
return, a parameter "Setting for the movement amount
after near-point dog ON" is smaller than a distance
necessary for deceleration stop from a home position
return speed.
[Operation status at error occurrence]
At start: The system does not operate.
During operation: The system stops with the setting
(deceleration stop/sudden stop) of the detailed
parameter 2 Sudden stop selection (stop group 3).
The home position return request flag is turned ON
when a fast-home position return is started (positioning
start No. 9002).
[Operation status at error occurrence]
The fast-home position return does not start.
The restart command is turned ON after the machine
home position return is stopped using a stop signal.
[Operation status at error occurrence]
The restart is not carried out.
The data is not loaded from the servo amplifier properly
upon the home position return.
[Operation status at error occurrence]
The home position return does not complete.
The data is not loaded from the servo amplifier properly
upon the home position return.
[Operation status at error occurrence]
The home position return does not complete.
Home position return is started on the direct drive motor
when the absolute position data of the encoder has not
been established.
[Operation status at error occurrence]
The home position return does not start.
Servo amplifier parameter "Function selection C-4
(PC17)" is not set to "0: Need to pass servo motor Z-
phase after power on" in the machine home position
return of scale origin signal detection method.
[Operation status at error occurrence]
The home position return does not start.
The zero point is not passed when the dog method,
count method or scale origin signal detection method
home position return is re-started, or data set method
home position return is executed.
[Operation status at error occurrence]
The home position return does not complete.
At the time of JOG starting, the JOG speed comes out
of a specified range.
[Operation status at error occurrence]
The JOG operation is not carried out when the JOG
speed is outside the setting range at the time of JOG
start.
Remedy
• Lower the home position return speed.
• Increase the dog signal input time.
• Calculate the movement distance using a speed
limit, home position return speed, and deceleration
time, and set the movement amount after near-point
dog ON so that the distance becomes a deceleration
distance or longer.
• Lower the home position return speed.
• Adjust the near-point dog position so that the
movement amount after near-point dog ON
becomes longer.
Execute the machine home position return (positioning
start No. 9001).
Start the machine home position return (positioning
start No. 9001) again.
• Execute home position return again.
• When the servo parameter "Function selection C-4
(PC17)" is changed to "1: Not need to pass servo
motor Z-phase after power on", transfer the
parameter from the Simple Motion module to the
servo amplifier and turn the power supply of the
servo amplifier OFF. Then, turn it ON and execute
home position return again.
Execute home position return again.
Turn the power supplies of the system or servo
amplifier from OFF to ON after passing the zero point
of the motor by the JOG operation, etc.
Set "0: Need to pass servo motor Z-phase after power
on" in the servo parameter "Function selection C-4
(PC17)".
Turn the motor more than one revolution using JOG or
positioning operation.
Bring the JOG speed into the setting range.