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Chapter 8.
TROUBLESHOOTING
8.2.4 Output Operations D o N o t Execute
Output operations do not
execute.
Is the voltage of the
external power
supply normal?
Yes
Is the voltage
conforming to the
output specifications?
Yes
Is output wiring
normal?
Yes
I s O U T 1 a n d O U T 2
LEDs correctly
operating?
Yes
Is turned the
output enable
Yes
Is output data
correct?
Yes
Is channel
correctly set?
Yes
Are I/O signals
correctly allocated?
Yes
Is entered any foreign
material when handling?
No
HW Fault
No
No
No
No
Is the set value set
every scan?
HW Fault
No
No
No
No
Yes
Remove the foreign material
8 - 5
Check and correct the
external power supply
Connect the output line so
that it conforms to the output
specifications.
Correct the wiring
Yes
Correct the program so that
the set value is set only
when the value is changed.
Correct the program to set
the output enable signal ON.
Correct the program for
proper output data.
Correct the program for
proper channels.
Correct the program for
proper I/O signals.
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- Chapter 1 . Introduction
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Table of Contents
Troubleshooting
