Omron SYSMAC CS1W-CLK11 Operation Manual page 133

Introduction
CVM1 and CV-series PCs
SEND
(↑)SEND(192)
S
S: Source node beginning send word
D: Destination node beginning receive word
D
C: Source node first control data word
C
15
C
15
C+1 0
15
C+2
Destination node N
00 to 20 (Hex): 0 to 32
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.
RECV
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.)
0
"n" number of send words
0000 to 03DE (Hex): 1 to 990 words
11 8 7 0
0
Destination network address
00 (Hex): Local network
01 to 7F (Hex): 1 to 127
11 8 7 0
Destination unit address
00 (Hex):
01 (Hex):
10 to 1F (Hex): Unit nos. 0 to 15
FE (Hex):
Note 1. When using CVM1 and CV-series PCs 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.
RECV receives "m" words beginning with S (the beginning word for data
transmission at the destination node, M) to the words beginning with D (the
beginning word for data reception at the source node).
Source node
15
S
15 10 8 7
C+3 0
Communication port No.
0 to 7
0: Response required
1: Response not required
C+4
PC's CPU Unit
Computer (user program)
Unit connected to network
Section 6-1
Destination node N
0 15
D
"n" number
of send
words
n
3 0
0
Number of retries
0 to F (Hex): 0 to 15 retries
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.
0
n
117