Err Led Turns On On The Expansion Unit - Panasonic FP7 Series User Manual
Cpu unit
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Also See for FP7 Series:
- Command reference manual (1222 pages) ,
- User manual (275 pages) ,
- Additional functions manual (45 pages)
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1.
Check whether the input indication LED on the unit is ON.
If it is OFF, proceed to the next step. If it is ON, proceed to
2.
Check the wiring of the input device (e.g. are there any loose terminals?).
If LED on the unit turns on following the above step, undercapacity of power supply is
possible. Review the power supply design.
3.
Check that the power is properly supplied to the input terminals.
If the power is properly supplied to the input terminals, there is probably an abnormality in
the unit's input part. If the power is not supplied to the input terminal, there is probably an
abnormality in the power supply or the input device.
4.
Monitor the input status using the tool software FPWIN GR7.
If the input monitored is off, there is probably an abnormality with the unit's input part.
Modify the program if the input monitored is on. If the input device is a two-wire sensor,
influence of leaked current is possible.
● When the program is to be reviewed, check the following points.
1. Check if the output has been written by any duplicated use of output, etc.
2. Check if the flow of the program has been changed by a control instruction, such as an
MCR instruction or JMP instruction.
3. Check if the allocation in the I/O map matches the mounting state.
6.2.7 ERR LED Turns ON on the Expansion Unit
■
Condition:
There is probably an error in the power supply system of the expansion block in which the
expansion slave unit with the ERROR LED lit is attached or another expansion block connected
to the subsequent stage, or an error in a unit in the expansion block.
■
Solution:
Clarify the situation in the following procedure.
1.
Check if the power supplies to all the expansion blocks registered in the I/O map are ON.
2.
Check the wiring conditions of expansion cables and power supplies.
3.
Check if the end unit is connected at the end of the expansion block.
4.
Check if an error occurs in a unit in the expansion block.
If a unit error occurs, refer to the manual of each unit and find the cause of the error.
5.
Clear the self-diagnostic errors of the CPU unit.
6.
Turn on the power to the expansion units first, and then turn on the power to the CPU unit.
WUME-FP7CPUH-09
6.2 What to Do If an Error Occurs
"Step
4".
6-7
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