6 MAINTENANCE
6-6
6.2.1 Troubleshooting the power supply and remote I/O station modules
Indicator
condition
Check item
Remedial action
POWER ON
LED not lit
Improper power cable connection
Connect the power cable properly.
Power cable breakage
Replace the power cable with a new one.
Power supply abnormality (in
voltage or waveform)
Supply normal power to the module.
None of the above
Replace the power supply module with a new
one.
6.2.2 Troubleshooting the remote I/O station module
Indicator
condition
Check item
Remedial action
RI/O LED
not lit
LPU or CPU module abnormality
Refer to the instruction manual on the LPU or
CPU module and solve the problem.
Ladder program running in SIMU
RUN mode
Change the operation mode to STOP or
RUN.
Station no. setting error
Refer to the instruction manual on the LPU or
CPU module and set the station no. correctly.
Power supply module operation
abnormality
Troubleshoot the power supply module
according to the instructions given in
Subsection 6.2.1.
Remote I/O
cable
abnormality
Cable breakage
Replace the remote I/O cable with a new one.
Cable length too
long
Re-wire the remote I/O cable within the
prescribed length limit, which is specified in
the instruction manual on the LPU or CPU
module.
Cable
connection
incomplete
Refer to the instruction manual on the LPU or
CPU module and connect the remote I/O
cable correctly.
Terminating-
resistor
connection
incorrect
Refer to the instruction manual on the LPU or
CPU module and connect the terminating
resistor correctly.
Power supply or remote I/O
station module mounted in wrong
slot
Mount the module in the right slot.
None of the above
Replace the remote I/O station module with a
new one.
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Страница 24: ...1 GENERAL INFORMATION ...
Страница 38: ...2 SPECIFICATIONS OF INDIVIDUAL MODULES ...
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Страница 92: ...4 WIRING ...
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Страница 102: ...5 MAKING USE OF MODULES ...
Страница 150: ...6 MAINTENANCE ...
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Страница 164: ...7 APPENDIX ...
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