Mitsubishi Electric melsec q00ujcpu User Manual page 580

2) Subroutine program
• In the subroutine program, an failure status is checked using a failure detection ladder pattern.
• If a failure is detected, a failure number is stored in D200 and the annunciator F200 is turned on.
• Specify the following arguments for the subroutine program.
First argument
Second argument
(d) Replacement method when failure detection ladder patterns are changed by the CHKCIR and
CHKEND instructions
Failure detection ladder patterns can be changed in the subroutine program described in (c).
Device number of X device targeted for failure check
Contact number of X device targeted for failure check
Figure App.14 Sample program
APPENDICES
(Input)
(Input)
<Failure detection target>
If a failure is detected, the
coil number corresponding
to the failure type is set to
D100.
If a failure is detected, a
failure number is created
by combining the coil
number corresponding to
the failure type and the
contact number.
The annunciator is turned
on.
App - 36
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APPEN-
DIX
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