FP2/FP2SHSelf-Diagnostic Function and Troubleshooting
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8.1 Self-Diagnostic Function
8.1.2 Operation When an Error Occurs
Normally, if an error occurs, the operation stops.
There are some instances in which operation continues even if an error occurs, such
as with a battery error.
The user may select whether operation is to be continued or stopped if a duplicated
output error or operation error occurs, by setting the system registers. You can set the
system registers for error which operation is to be continued or stopped using
programming tool software (NPST−GR/FPWIN GR).
PLC Configuration (System register) Setting Menu of FPWIN GR Software
1. On the “Option” menu, select “PLC Configuration”.
2. In the [PLC Configuration] Screen, select [Action on Er-
ror] tab.
Register
No.
Item Description
20 DUPLICATE OUTPUT [DISE, ENAB]
21 I/O UNIT ERROR [STOP, CONT]
22 INTELLIGENT UNIT ERROR [STOP, CONT]
23 I/O VERIFY ERROR [STOP, CONT]
24 UNUSED
25 UNUSED
26 OPERATION ERROR [STOP, CONT]
27 REMOTE I/O SLAVE LINK ERROR [STOP, CONT]
28 I/O ERROR IN REMOTE I/O SLAVE [STOP, CONT]
29 UNUSED
4 BATTERY ERROR INDICATION [ENAB, DISA]
INDEX MODIFIER CHECK [ENAB, DISA]
Allowing duplicated output
When you set the system register 20 to “ENAB”, duplicated output is not regarded as
an error and the PLC continues to operate.
Continuing after an operation error
When you set the system register 26 to “CONT”, even if the PLC continues to operate,
this is regarded as an error.
This applies to system registers 21 through 28 as well.
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