Mitsubishi QJ71MB91, User Manual

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10
- 21 10.3 Z(P).MBREQ
10
DEDICATED INSTRUCTIONS
(f) When using the automatic communication function and the MBREQ instruction on
the same channel
The MBREQ instruction is not executed while the Response monitoring timer/
Broadcast delay of the automatic communication function is active.
When the automatic communication function and the MBREQ instruction are used
on the same channel, set appropriate automatic communication parameters and
create a proper sequence program so that the MBREQ instruction can be
executed in the right timing.(
Section 9.2.3)
(g) Confirmation of execution status
Whether the MBREQ instruction is being executed, or completed normally or not
can be checked by the completion device (D2) specified as set data, and the error
completion device ((D2)+1).
Figure 10.10 MBREQ instruction timing chart
The completion device (D2) turns ON in END processing of the scan after
completion of the MBREQ instruction, and turns OFF in the next END processing.
The error completion device ((D2)+1) turns ON in the END processing of the scan
after error completion of the MBREQ instruction, and turns OFF in the next END
processing. (The device remains OFF in the case of normal completion.)
(6) Error
(a) When a dedicated instruction completes in error
When the dedicated instruction completes in error, the error completion device
(D2)+1 turns ON and an error code is stored in the completion status (S1)+1.
(b) Confirmation of error details
Check the error code referring to the following, and take corrective actions.
Table10.13 Error codes for the MBREQ instruction
Item Reference
Error code
03E8
H
to 4FFF
H
QCPU User's Manual
(Hardware Design, Maintenance and Inspection)
7300
H
or later Section 11.4.3
Sequence program
MBREQ instruction
OFF
ON
Completion of MBREQ
instruction execution
Normal
completion
OFF
OFF
ON
Completion device (D2)
Error completion device
(D2)+1
END processing END processing END processing END processing
ON Error
completion
1 scan