Cmnd (Cvm1, Cv-Series, Cs/Cj-Series, And Cqm1H-Series Plcs Only) - Omron SYSMAC CS1W-RPT01 Operation Manual

Introduction
6-1-2 CMND (CVM1, CV-series, CS/CJ-series, and CQM1H-series PLCs
Only)
CS/CJ-series PLCs
CMND(490)
S
S: Source node beginning send word
D: Destination node beginning receive word
D
C: Source node first control data word
C
15
C
"n" bytes of command data
0000 to 07C6 (Hex): 0 to 1,990 words
15
C+1
"m" bytes of response data
0000 to 07C6 (Hex): 0 to 1,990 words
15 11 8 7
C+2 0 0
Destination network address
00 (Hex): Local network
01 to 7F (Hex): 1 to 127
15 8 7
C+3
Destination unit address
00 (Hex):
01 to 0F (Hex): Computer (user program)
10 to 1F (Hex): Unit nos. 0 to 15
E1 (Hex):
FE (Hex):
Destination node N
00 to 20 (Hex): 0 to 32 (or 00 to 3E (Hex): 0 to 62)
The same data can be broadcast to all nodes
on the network by setting the destination node address
to FF (Hex).
The range of node addresses will vary for networks
other than Controller Link Networks.
Note
182
The CMND instruction can be executed in the user program in a CVM1, CV-
series, CS/CJ-series, or CQM1H-series PLC to perform operations such as
reading and writing memory data from and to other nodes, reading status
information, and changing the operating mode.
CMND sends "n" bytes of command data beginning with S (the beginning
send word for storing command data at the source node) to destination node
N. In return, "m" bytes of response data are stored at the source node begin-
ning with D (the beginning receive word for storing response data).
0
0
0
C+4
0
PLC's CPU Unit
C+5
(02 to 0F (Hex) are used
when using Controller
Link Support Boards for
PCI Bus only.)
Inner Board
Unit connected to network
1. With the message service, there is no guarantee that a message to a des-
tination node will reach its destination. It is always possible that the mes-
sage may be lost in transit due to noise or some other condition. When
Source node
0
15
S
Command
"n" bytes
of com-
mand
(S –1)
data
n
+
2
Response
D
"m" bytes
of
response
data
(D –1)
m
+
2
15 11 8 7 3 0
0 0
Number of retries
0 to F (Hex): 0 to 15 retries
Communications port number: 0 to 7 (Hex)
0: Response required
1: Response not required
15 10 8 7 3 0
Response monitor time
0000 (Hex): 2 s
0001 to FFFF (Hex): 0.1 to 6,553.5 s
(Unit: 0.1 s)
If the baud rate is slow, then setting a
small value may generate an error. The
standard is approximately 4 seconds at
1 Mbps or 8 seconds at 500 Kbps.
Section 6-1
Destination node N
Analysis
Execution