CV500ETN01 Omron, CV500ETN01 Datasheet - Page 164

• Manufacturer Part Number: CV500ETN01
• Description: Programmable Logic Controller
• Manufacturer: Omron

Specifications of CV500ETN01

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

CMND(490)
Communicating between OMRON PLCs
(@)CMND(490)
D
C
S
C+1
C+2
C+3
C
S: Beginning command storage word
D: Beginning response storage word
C: First word of control data (below)
15
Number of bytes of command data (n)
15
15
15
Number of bytes of response data (m)
0
Note
0000 to 07C6 (Hex): 1 to 1,990 bytes
0000 to 07C6 (Hex): 1 to 1,990 bytes
Destination node number N
00 to FE (Hex):
11
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.
0
8 7
8 7
The CMND(490) instruction sends n bytes of command data, starting from the
beginning word S at the local node, to the node at node address N. the data in
m number of words, starting from the beginning word S at the remote node
(node address M) is received at the words starting from the beginning word D
at the local node.
Destination network number
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.
Destination Unit address
00 (Hex):
10 to 1F: (Hex): Unit #0 to #15
E1 (Hex):
FE (Hex):
00 (Hex):
01 to 7F (Hex): 1 to 127
0
0
0
0
0 to 254
CPU Unit
Inner Board
Unit connected to network
Local network
(S 1)
(D 1)
+
+
S
n
2
D
m
2
15
Local node
0
C+4
C+5
Re-
sponse
data: m
bytes
Com-
mand
data: n
bytes
15
15
Response
0: Required.
1: Not required.
Response
Command
0
10
10
Destination node number N
8 7
8 7
Communications port number: 0 to 7
Response monitor time
0000 (Hex): 2 s
0001 to FFFF (Hex): 0.1 to 6,553.5 s
(in units of 0.1 s)
Interpretation
0
Execution
3
3
0
0
Number of retries
0 to F (Hex): 0 to 15 retries
Section 6-6
139