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I/O Check The I/O check flowchart is based on the following ladder diagram section.
01003
00002
(LS1)
00003
(LS2)
SOL1 malfunction.
SOL1
01003
Yes
Monitor the ON/OFF
status of IR 01003
with a Peripheral
Device.
No
Is the IR 01003 out-
put indicator operat-
ing normally?
Check the voltage at the
IR 01003 terminals.
Wire correctly.
Operation
O.K.?
Is output wiring
correct?
Disconnect the external wires
and check the conductivity of
each wire.
No
Yes
Check output device
SOL1.
Operation
O.K.?
Replace the CPU Unit
or Expansion I/O Unit
with the problem.
Yes
No No
Operation
O.K.?
NoYes
Yes
A
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Malfunction of SOL1
Has the external
power supply shorted
or overloaded?
Yes
No
Correct the short cir-
cuit or limit the con-
nected load to the
specification range
Troubleshooting Flowcharts
Section 5-6