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11-53
11 Troubleshooting
NJ-series CPU Unit Motion Control User’s Manual (W507)
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11-2
-3 Error Ca
uses and R
emedies
This section describes remedial actions to take when problems occur the first time you use the MC
Function Module or after starting operation.
If an error occurs, check the items below to investigate the problem.
11-2-3 Error Causes and Remedies
Preliminary Check Items
Category Item to check
Installation conditions Is there dust in the ambient environment?
Are there conductive foreign matters (metal, carbon, etc.) in the ambient
environment that might enter the Controller?
Is the ambient temperature higher than the ambient operating temperature
in the specifications?
Is the ambient area humid (due to moisture in the air, use of water, etc.)?
Does the ambient air contain corrosive gases (acid, salt, sulfur, etc.)?
Are there sources of noise around the Controller (welders, inverters, etc.)?
Wiring Are power supply lines wired in the same duct as the signal lines?
Is the Controller grounded properly?
Is there a noise filter in the power supply?
Changes Was any extension work (welding work) done lately?
Was any power supply facility added lately?
Was the system (including its program) modified in any way (including addi-
tions)?
Accidents Was there a lightning strike nearby?
Was there a ground-fault accident or was the earth leakage breaker tripped?
Was there a power outage?