Omron CPM2C Operation Manual page 148

Are the IR 00002
and IR 00003 input indi-
cators operating
A
normally?
From
Yes
previous
page
Check the voltage at
the IR 00002 and
IR 00003 terminals.
Operation OK?
Yes
Check operation by using a
dummy input signal to turn the
input ON and OFF.
No
Operation OK?
Replace the CPU Unit
or Expansion I/O Unit.
No No No
Check the voltage at
the IR 00002 and
IR 00003 terminals.
Operation OK?
No
Yes
No
Is input wiring
Wire correctly.
Yes
Return to "start."
Check input devices
LS1 and LS2.
Yes
No
correct?
No
Tighten the terminal
screws and connect
connectors.
Section 5-5
Are the terminal
screws loose or con-
nectors disconnected?
Yes
No
Replace the CPU Unit
or Expansion I/O Unit.