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FX1N Series Programmable Controllers Diagnostics 7.
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7.3 Common Errors
- Corroded contact points at some point in an I/O line.
- An I/O device has been used outside its specified operating range.
- An input signal occurs in a shorter time period that taken by one program scan.
7.4 Maintenance
- Check interior temperature of the panel.
- Check panel air filters if fitted.
- Check for loosening of terminals or mounting facilities (due to vibration).