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Chapter 13 Troubleshooting
13-13
(f) Wrong output from output module or output module will not output (operation problem)
The CPU operates, but output signals are not correct.
Check the output area
•
Forced output
•
I/O assignment
•
Program
NO
YES
YES
NO
Check output signals
•
Output signal voltage
•
Power supply voltage for load
•
Terminal block wiring
•
Terminal block connector
connection
•
Voltage between the common
and the bit
•
Wiring
Especially for the S terminal
on the transistor
•
The drive power supply for the
relay is not connected
NO
YES
LED error
∗
LED replacement may not be
performed by the user, so a
repair request must be
submitted
Check for output error
•
Check the output power
supply
•
Check the output program
•
Malfunction due to noise
Output LED is not lit
Will not output
Output LED is lit
Will not output
Output LED is not lit
Will output