Omron CS1W-ETN11 Operation Manual page 107

Sending Commands From a PC
CMND(049)
S: Beginning command storage word
D: Beginning response storage word
C: First word of control data (below)
Number of bytes of command data (n)
0000 to 07C6 (Hex): 1 to 1,990 bytes
Number of bytes of response data (m)
0000 to 07C6 (Hex): 1 to 1,990 bytes
Destination node number N
00 to 7E (Hex);
The same data can be broadcast to all nodes on the network by
setting the destination node number to FF (Hex).
The range of node addresses is different for networks other than Ethernet.
86
The CMND(049) instruction sends n bytes of command data, starting from the
beginning word S at the local node, to the node at node number N. the data in
m number of words, starting from the beginning word S at the remote node
(node number M) is received at the words starting from the beginning word D
at the local node.
Destination network number
00 (Hex): Local network
01 to 7F (Hex): 1 to 127
Destination Unit address
00 (Hex): CPU Unit
10 to 1F: (Hex): Unit #0 to #15
E1 (Hex): Inner Board
FE (Hex): Unit connected to network
0 to 126
Note The message services function does not guarantee that a message will reach
the destination node. A message may be lost during transmission due to fac-
tors such as noise. In order to prevent this from occurring when using mes-
sage services, it is common to set up retry processing at the node from which
instructions are issued. With the SEND(090), RECV(098), and CMND(490)
instructions, retry processing is executed automatically by specifying the num-
ber of retries, so specify a number other than 0.
Local node Destination node number N
Command
Com-
mand
data: n
bytes
Response
Response
data: m bytes
Number of retries
0 to F (Hex): 0 to 15 retries
Communications port number: 0 to 7
Response
0: Required.
1: Not required.
Response monitor time
0000 (Hex): 2 s
0001 to FFFF (Hex): 0.1 to 6,553.5 s (in units of 1 s)
Section 5-3
Interpretation
Execution