Mitsubishi Electronics FX1S User Manual
FX1S Series Programmable Controllers
Diagnostics 7
7-3
7.2
Common Errors
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Corroded contact points at some point in an I/O line.
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An I/O device has been used outside its specified operating range.
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An input signal occurs in a shorter time period that taken by one program scan.
7.3
Maintenance
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Check interior temperature of the panel.
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Check panel air filters if fitted.
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Check for loosening of terminals or mounting facilities (due to vibration).