B–63505EN/02
7.TROUBLESHOOTING
263
Absolute position data in the serial pulse coder was lost.
(This alarm will be generated when serial pulse coder is exchanged or
position feedback signal cable of the serial pulse coder is disconnected).
Machine position must be memorized using the following method:
(1)Execute manual reference position return only for an axis for which
this alarm was generated.When manual reference position return
cannot be executed because of an another alarm, set parameter 1815#5
to 0 and release the alarm and perform manual operation.
(2)Press RESET key at the end of reference position return to release the
alarm.
Execute dogless reference position setting to memorize the reference
position.
Since the reference position is different from the former one, change the
grid shift value (PRM 1850) to correct the position.
#7
1815
#6 #5
APC x
#4
APZx
#3 #2 #1 #0
#4(APZx) Reference position of absolute pulse coder is :
0 : not established
1 : established
#5(APCx) 0 : Position detector is incremental pulse coder.
1 : Position detector is absolute pulse coder.
PC
Battery 6V
Servo motor
SERVOn
(JSnA)
(JSnB)
(JFn) Feedback cable
TB2 Power cable
PWM signal
Feed back signal
Servo amplifer module
Main board
*Above figure is for built–in absolute pulse coder.
7.10
ALARM 300
(REQUEST FOR
REFERENCE
POSITION RETURN)
Remedies
D When reference position
return function is
present
D When reference position
return function is not
present
D When serial pulse coder
is changed
Related parameters
System configuration