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8. COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
8.12.2 Program readlwrite control procedures
(1)
Reading
PROGRAM READ
+-
Execute parameter data read
command (PR)
Execute main sequence
TIC
set
value read command (MR)
Only executable
(when a data link system is used)
1
at other stations.
a
Subsequence program read
command (SR) execution
Only executable
at other stations.
Sub TIC set value read com-
mand (SR) execution
(when a microcomputer program is not used)
.
Execute microcomputer main
program read command (UR)
Only executable
(when adata link system
i s
used)
a data link system is used)
Execute comment data read
command (KR)
- - - I
I
. .
I
1
(when comment data is not used)
Only executable t o w A7ACPU
1
or A3ACPU of o h r s t a h %
Expansion comment data
r e d
command (DR) execution
.
I
.
f
READ COMPLETE
7
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