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Selecting Communications Instructions Section 6-2
6-2-1 Message Service Operations
Note 1. CMND cannot be used with C200HX/HG/HE PLCs.
2. If a computer is receiving commands, a program is required at the comput-
er for sending back responses.
Instruc-
tion
Source node Destination node Communica-
tions con-
tents
Data
length
Broad-
casting
Network con-
nections
C200HX/
HG/HE
CQM1H CS/CJ,
CVM1,
or CV
C200HX
/HG/HE
or
CQM1H
CS/CJ,
CVM1,
or CV
Com-
puter
SEND
and
RECV
Ye s Ye s Ye s Ye s Ye s Ye s
(See
note
2.)
Read to and
write from all
I/O memory
areas.
990
words
max.
(1,980
bytes)
SEND
only (no
response)
Yes (up to
three levels
including local
network), via
CS/CJ-series,
CVM1, or
CV-series
PLCs.
CMND
(See
note 1.)
No Ye s Ye s Ye s Ye s Ye s
(See
note
2.)
Data
read/write:
Read to and
write from all
I/O memory
areas.
Read PLC
model.
Read status
data.
Read time
data.
Read and
write File
Memory data.
Read PLC
mode.
PLC Control:
Change PLC
mode.
Forced set/
reset
Clear PLC
errors.
2,012
bytes
max.
Yes (no
response)