7. TROUBLESHOOTING
B–63505EN/02
264
The absolute pulse coder cable, or servo module on the main board may
be faulty.
1 Agitate the cable connected to the SERVO 1 to 4 or the cable connected
to the ENC 1 to 4 of servomodule. If an alarm is issued, replace the
cable.
2 Replace the servo module or main board.
First/second axis servo interface circuit is mounted on the main board,
and the third/fourth axis servo interface circuit is mounted on the servo
module. Therefore, replace either the main board or servo module
according to the axis for which an alarm was issued.
NOTE
1 The configuration and mounting locations of the modules
mounted on the main board vary with the specification of the
main board. For details, see Subsec. 2.2.1.
2 When the main board is replaced, all the data stored in
memory is lost. Set NC data again, referring to Chapter 3
“INPUT AND OUTPUT OF DATA”.
7.11
ALARM 301 TO 305
(ABSOLUTE PULSE
CODER IS FAULTY)
Countermeasures