
7. TROUBLESHOOTING
B–63505EN/02
270
Ready signal (*DRDY) of servo amplifier is not turned on or turned off
during operation.
(START)
Check LED status
of servo amplifier
module
[-] ?
Check input power sup-
ply of servo amplifier
module
Normal ?
Servo amp. mod-
ule is faulty
Check power
supply module
YES
YES
NO
NO(Not lit)
NO
YES
Check DC Link voltage
100VAC is
normal ?
S Cable disconnection between servo amp.
module and main board.
S Servo module failure on main board:
S Main CPU board is faulty
*When alarm 414 is also generated, LED
shows a number. Consult with alarm 414.
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”.
7.16
ALARM 401
(*DRDY SIGNAL
TURNED OFF)