Omron SYSMAC CS Series Operation Manual page 610

Error Processing
11-2-13 I/O Check
START
Indicator of
NO
000500 normal?
YES
Check terminal
voltage of 000500
with tester
ABNORMAL
Voltage normal?
NORMAL
NORMAL
Check output de-
vice SOL1
Indicators of
NO
inputs (000002,
000003) normal?
YES
Check terminal
voltages of 000002
and 000003 with
tester
ABNORMAL
Voltage normal?
NORMAL
ABNORMAL
Replace Input Unit
572
The I/O check flowchart is based on the following ladder diagram section
assuming that SOL1 does not turn ON.
Replace terminal
Correct wiring
block connector
NO
Output
wiring correct?
connector con-
YES
Disconnect external
wiring and check ter-
minal voltage of
000500 with tester
ABNORMAL
Voltage normal?
Check terminal
voltages of 000002
and 000003 with
tester
Voltage normal?
Remove external
wiring and mount
wiring correct?
Dummy Input Unit
YES
to check
Correctly wire
Operation OK?
NORMAL
Return to START
Check LS1 and LS2
(LS1)
000002 000003
000500
Replace fuse
YES
Faulty
NO
terminal block
blown fuse indi-
cator lit?
tact?
(Units with
internal
fuse)
(Unit with- Replace Output
out fuse)
Unit
NORMAL
ABNORMAL
Input
NO
Tighten
Section 11-2
(LS2)
SOL1
000500
Monitor ON/OFF
status of 000500
with Programming
Device
YES
Is the
NO
Operation OK?
Terminal
YES
screws loose?
Faulty
terminal block
connector con-
tact?
Replace terminal
block connector
Replace Input Unit
ABNORMAL
NORMAL
NO
NO
YES