Publication 1747-RM001G-EN-P - November 2008
SLC Communication Instructions 12-9
Figure 12.4 SLC 5/03, SLC 5/04, and SLC 5/05 Repeating Messaging Example
For the SLC 5/05 Channel 1 Ethernet, TCP/IP protocol is used to establish
Ethernet connections, in order to send the MSG commands. Connections can
be initiated by either a client program (INTERCHANGE or RSLinx
application) or a processor.
The client program or processor must first establish a connection to the SLC
5/05 to enable the SLC 5/05 to receive solicited messages from a client
program or another processor (incoming connection). The client program
must also establish a connection to the SLC 5/05 to enable the SLC 5/05 to
send unsolicited messages to a client program (outgoing connection).
To send a peer message, the SLC 5/05 must first establish a connection with
the destination node at a specified IP address on the Ethernet network. A
connection is established when a MSG instruction executes and no previous
connection to the same device exists. When a MSG instruction executes, the
SLC 5/05 checks to see whether a connection has been established with the
destination node. If a connection has not been established, the SLC 5/05
attempts to establish a connection of the peer type.
0000
EN
DN
ER
MSG
Read/Write Message
Type
Peer-To-Peer
Read/Write
Read
Target Device
500CPU
Local/Remote
Local
Control Block
N9:0
Control Block Length
14
Setup Screen
SLC_503_504_505_MSG
0001
N9:0
13
MSG_DN_BIT
N9:0
12
MSG_ER_BIT
N9:0
15
MSG_EN_BIT
0002
END
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