Mitsubishi Electronics A1SJ71AR23Q Manuel D’Utilisation
3
SPECIFICATIONS
3.6 Details of Buffer Memory
3.6.4 LRDP instruction receive request/receive result/work area
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3.6.4
LRDP instruction receive request/receive result/work area
When a device read (LRDP instruction) is requested to a Q series local station from the
master station, execute receive processing to the LRDP instruction in a sequence
program.
master station, execute receive processing to the LRDP instruction in a sequence
program.
The following shows operations of a local module at the time of receiving the LRDP
instruction.
instruction.
Figure 3.9 Operation of local module at the time of receiving LRDP instruction
0
END
0
END
LRDP
0
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0
END
100
100
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END
0
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END
100
0
END
Read command
Read completion device
Read data storage device
CPU module
CPU module
Sequence scan
Link module
Link module
Refresh ready status (X7)
Sequence scan
Read data (B4
H
or later)
Local module
Local module
LRDP instruction receive request
(AC
(AC
H
)
5 (Processing completed)
(1 scan)
CPU module
CPU module
Link scan
Read data storage device
4 (Processing
requested)
requested)