Self-Diagnostic and Troubleshooting
FP0
11
−
7
11.2 Troubleshooting
11.2.2
ERROR/ALARM LED is ON
The system watchdog timer has been activated and the operation of FP0 has been
stopped.
<Condition>
If the ERROR/ALARM LED is turned ON , the program execution time is too long.
Check:
Set the mode switch from RUN to PROG. and turn the power OFF and then ON.
<Procedure 1 >
If the ERROR/ALARM LED is turned ON again, there is probably an abnormality
in the FP0. Please contact your dealer.
If the ERROR/ALARM LED is blinked, go to section 11.2.1.
If instructions such as
JP
or
LOOP
are programmed in such a way
that a scan can never finish.
that interrupt instructions are executed in succession.
Set the mode switch from PROG. to RUN.
<Procedure 2 >
11.2.3
All LEDs are OFF
Check the power supply wiring.
Disconnect the power supply wiring to the other devices if the power supplied to the
FP0 control unit is shared with them.
Check if the power supplied to the FP0 control unit is in the range of the rating.
Be sure to check the fluctuation in the power supply.
If the LEDs on the FP0 control unit turn ON at this moment, the capacity of the
power supply is not enough to control other devices as well.
Prepare another power supply for other devices or increase the capacity of the
power supply.
<Procedure 1 >
<Procedure 2>
<Procedure 3>
Summary of Contents for FP0 Series
Page 14: ...Table of Contents FP0 xii ...
Page 16: ...Overview FP0 1 2 ...
Page 82: ...S LINK Control Unit FP0 4 2 ...
Page 95: ...Chapter 5 I O Allocation 5 1 I O Number 5 3 5 2 Control Unit 5 4 5 3 Expansion I O Unit 5 5 ...
Page 96: ...I O Allocation FP0 5 2 ...
Page 100: ...I O Allocation FP0 5 6 5 3 Expansion I O Unit ...
Page 102: ...Installation FP0 6 2 ...
Page 112: ...Installation FP0 6 12 6 5 Installation Using FP0 Flat Type Mounting Plate ...
Page 114: ...Wiring FP0 7 2 ...
Page 198: ...High speed Counter Pulse Output PWM Output FP0 9 34 9 5 PWM Output Function ...
Page 200: ...General use Serial Communications FP0 10 2 ...
Page 210: ...Self Diagnostic and Troubleshooting FP0 11 2 ...
Page 220: ...Specifications FP0 12 2 ...
Page 234: ...Dimensions FP0 13 2 ...
Page 243: ...Chapter 14 Appendix ...
Page 380: ...14 138 14 7 ASCII Codes ...