Omron CQM1H-CLK21 - Manual (Page 196)

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Introduction Section 6-1
CVM1 and CV-series PLCs
SEND SEND transmits “n” words beginning with S (the beginning word for data
transmission at the source node) to “n” words beginning with D (the beginning
word for data reception at the destination node, N.)
Note 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
“00” as the local network address in the routing tables, and then specify
that number.
2. 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
using the message service, it is advisable to prevent this situation from oc-
curring by performing resend processing at the node where instructions
are issued. With the SEND, RECV, and CMND instructions, resend pro-
cessing 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.
S: Source node beginning send word
D: Destination node beginning receive word
C: Source node first control data word
Destination node N
01 to 20 (Hex): 1 to 32 (or 01 to 3E (Hex): 1 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.
( ↑ )SEND(192)
S
D
C
C+1 0 0
C+3 0 0
Number of retries
0 to F (Hex): 0 to 15 retries
Communication port No.
0 to 7
0: Response required
1: Response not required
C+4
C
"n" number of send words
0001 to 03DE (Hex): 1 to 990 words
15 11 8 7 0
Destination network address
00 (Hex):
Local network
01 to 7F (Hex): 1 to 127
C+2
15 11 8 7 0
Destination unit address
00 (Hex):
PLC's CPU Unit
01 to 0F (Hex): Computer (user program)
10 to 1F (Hex): Unit nos. 0 to 15
FE (Hex):
Unit connected to network
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.
15 0
Destination node N
"n" number
of send
words
n
S
15 0
n
D
15 0
Source node
… …
(02 to 0F (Hex) are used
when using Controller Link
Support Boards for PCI Bus
only.)