Omron C200HW-CLK21 Operation Manual page 203

Introduction
CVM1 and CV-series PLCs
CMND(194)
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
C+2 0 0
15
C+3
Destination unit address
00 (Hex):
01 to 0F (Hex): Computer (user program)
10 to 1F (Hex): Unit nos. 0 to 15
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
180
sage service, it is advisable to prevent this situation from occurring by per-
forming resend processing at the node where instructions are issued. With
the SEND, RECV, and CMND instructions, resend processing is performed
automatically once the number of retries has been set, so be sure to specify a
number other than "0" for the number of retries.
CMND sends "n" bytes of command data beginning with S (the beginning
word for storing command data at the source node) to node N. In return, "m"
bytes of response data are stored at the source node beginning with D (the
beginning word for storing response data).
0
0
8 7 0
Destination network address
00 (Hex): Local network
01 to 7F (Hex): 1 to 127
8 7 0
PLC's CPU Unit
(02 to 0F (Hex) are used
when using Controller Link
Support Boards for PCI
Bus only.)
Unit connected to network
1. When using CVM1 and CV-series PLCs manufactured prior to April 1996,
the local network address cannot be set to "00." Set a number other than
Source node
0
15
S
"n" bytes
of com-
mand
(S –1)
data
n
+
2
D
"m" bytes
of
response
data
(D –1)
m
+
2
15 11 8 7 3
C+4 0 0
Communications port number: 0 to 7 (Hex)
0: Response required
1: Response not required
15 10 8 7 3
C+5
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
Command
Analysis
Response
Execution
0
Number of retries
0 to F (Hex): 0 to 15 retries
0