
#7
ALD0201
#6 #5 #4
EXP
#3 #2 #1 #0
DGN
JF
X
JF2x
↓ ↓
B–62835EN/01
8. TROUBLESHOOTING
309
Position detection signal line is disconnected or short–circuited.
1 – – 0 Built–in serial pulse coder
disconnection
1 – – 1 Separate type position
detector connection
0 – – 0 Pulse coder disconnec-
tion (software)
1 Signal cable is disconnected or short–circuited.
2 Serial pulse coder or position detector is faulty Refer to CAUTION 1.
3 Base PCB or servo module is faulty. (See Sec.8.13)
Refer to CAUTION 2.
CAUTION
1 After the pulse coder is replaced, reference position or
machine’s standard position is different from former one.
Adjust and set it correctly.
2 When the base PCB is replaced, all the data stored in
memory is lost. Set NC data again, referring to chapter 3
“input/output of data”.
PC
Linear scale
Power Mate
JF2x
NOTE) In the case of the type A interface, the position detection signal line is
connected to the Power Mate, while in the case of the type B interface,
it is connected to the servo amplifier.
Servo amplifier
JFx
JVx
JSxB
JFx
Signal line for position detector
x is an axis number
D #1(FBA):DISCONNECTIO
N ALARM
D Causes