
7. TROUBLESHOOTING
B–63505EN/02
266
An error is generated in the control section of the serial α pulse coder.
1 Alarm No. 351 has also generated⇒Refer to alarm 351.
2 Only alarm No. 350 has generated⇒Refer to the following
Confirm
the details by diagnostic number 0202 and 0204.
#7 #6 #5 #4 #3 #2 #1 #0
0202 CMAL SPH
DGN
#0(SPH) Soft phase data abnormal alarm has generated.
#3(CMAL) Speed count abnormal alarm has generated.
1 Check the contens using the above diagnostic function if the alarm
generates repeatedly. If diagnostic data is the same, serial α pulse
coder may be faulty.⇒Refer to Note
2 When diagnostic result does not the same, or other abnormality is
detected, an external noise may be generated.
#7 #6 #5 #4 #3 #2 #1 #0
0204 LDAL PMAL
DGN
#3(PMAL) Pulses are not issued correctly by abnormality of serial α pulse coder or
feedback cable.
#4(LDAL) LED of serial α pulse coder is abnormal
(1)#4(LDAL) : LED in the serial pulse coder is abnormal.
Serialα pulse coder is faulty⇒Refer to Note
(2)#3(PMAL) : Pulses are not issued correctly by abnormality of
feedback cable.
1 Fault of serialα pulse coder ⇒Refer to Note
2 Feedback cable.
(Failure of the cables connecting the pulse coder and servo
amplifier module and those connecting the servo amplifier module
and main board)
NOTE
Reference position and machine’s standard position are
different from the ones before, adjust and set them correctly.
7.13
ALARM 350 (SERIAL
α PULSE CODER IS
ABNORMAL)
Points
D When diagnostic number
0202 shows 1
D When diagnostic number
0204 shows 1