NAiS FP0 Series

Questions and Answers:

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Priscilla LawrenceAug 4, 2025
Why is the ERROR/ALARM LED on my NAiS Controller ON?
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  Jennifer GreenAug 4, 2025
  The ERROR/ALARM LED might be on for several reasons: * The system watchdog timer may have been activated, stopping FP0 operation. To resolve this, set the mode switch from RUN to PROG. and cycle the power OFF and then ON. * The program execution time might be too long. Review your program for instructions like JP or LOOP that could prevent a scan from finishing. * Interrupt instructions might be executed in succession. * You can also try setting the mode switch from PROG. to RUN.
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Mitchell BrownAug 14, 2025
What to do if the ERROR/ALARM LED is blinking on my NAiS Controller?
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  Carol RoseAug 14, 2025
  If the ERROR/ALARM LED is blinking, it indicates a self-diagnostic error or a syntax error in the program. Here's what you can do: * Check the error code using the programming tool. * If there's a syntax error, switch to PROG. mode and clear the error. You can also execute a total-check function to pinpoint the syntax error's location. * For self-diagnostic errors other than syntax errors, use the programming tool in PROG. mode to clear the error. * In PROG. mode, turning the power OFF and then ON again can clear the error, but note that this will erase the operation memory (except hold type data). * Alternatively, you can clear the error by executing a self-diagnostic error set instruction F148 (ERR).
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Amy Bell PhDAug 23, 2025
How to troubleshoot if all LEDs are OFF on NAiS Controller?
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  Ethan MarshallAug 23, 2025
  If all LEDs are OFF on your NAiS Controller, try the following: * Check the power supply wiring. * Ensure the power supplied to the FP0 control unit is within the rated range. * If the FP0 control unit shares its power supply with other devices, disconnect their power supply wiring. * Consider using a separate power supply for other devices or increasing the capacity of the current power supply.

NAiS FP0 Series Specifications

General

Manufacturer	NAiS (Panasonic)
Series	FP0
Power Supply	24V DC
Type	Programmable Logic Controller (PLC)
Programming Language	Ladder Logic
Data Memory	3200 words
Communication Ports	RS232C, RS485
Operating Temperature	0 to +55°C