Check Points For Troubleshooting - Panasonic FP3 Technical Manual

5-1. Check Points for Troubleshooting

5-1. Check Points for Troubleshooting
When something goes wrong with the thermocouple input unit installed FP3/FP10S system or with the converted
value, check the FP3/FP10S system using the troubleshooting flowcharts in "5-2. Troubleshooting."
But, first of all, be sure to check the entire system including peripheral devices, referring to the:
- Observe what is happening.
- Check for error repetition.
- Check the status of indicators.
- Check that power is properly supplied to the FP3/FP10S system.
- Check whether the trouble detected is in the FP3/FP10S system or in other field devices.
- Check whether there is a problem with the program or not.
J Operation monitor LEDs of the FP3/FP10S CPU
The status of the operation monitor LEDs on the FP3/FP10S CPU vary depending on the condition. When checking
the operation status of programmable controllers, be sure to check the operation monitor LEDs while referring to the
table below.
FP3 CPU example
Operation
monitor
LEDs
LED status
RUN PROG. TEST BREAK
LED LED LED LED
ON OFF OFF OFF
OFF ON Varies OFF
Flashes OFF Varies OFF
OFF ON Varies OFF
ON OFF ON ON
ON OFF ON OFF
OFF Varies Varies Varies
ON OFF OFF OFF
Varies Varies Varies Varies Varies
Varies Varies Varies Varies Varies Varies
OFF Flashes Varies OFF
40
ALARM
ERROR BATT.
LED LED
LED
OFF Varies OFF Operation in the RUN mode
Varies Varies OFF Operation in the PROG. mode
Varies Varies OFF Forced ON/OFF in the RUN mode
Varies Varies OFF Forced ON/OFF in the PROG.
mode
Varies Varies OFF TEST/RUN (break condition)
Varies Varies OFF TEST/RUN (operating condition)
ON Varies OFF Self-diagnostic error (stops)
ON Varies OFF Self-diagnostic error (continues)
ON OFF CPU backup battery error
ON Watchdog timer error
Varies Varies OFF MEWNET-F slave waiting error
INITIALIZE/TEST switch
Mode selector
Program Program
execution
Description
Executing
Not-executing
Executing
Not-executing
Not-executing
Executing
Not-executing
Executing
Executing
Not-executing
Not-executing
Condition
status
Normal Normal
condition
Abnormal Ab l
condition condition