Publication 1747-RM001G-EN-P - November 2008
SLC Communication Instructions 12-11
MSG Instruction Configuration Options
The following configuration options are available on all SLC 5/02 and higher
processors.
• Peer-to-peer Read/Write on a local network to another SLC 500
processor
• Peer-to-peer Read/Write on a local network to a 485CIF device (PLC-2
emulation)
In addition, the following configuration options are available on all
SLC 5/03 and higher processors.
• Peer-to-peer Read/Write on a local network to a PLC-5 processor
• Peer-to-peer Read/Write on a remote network to another SLC 500
processor
• Peer-to-peer Read/Write on a remote network to a 485CIF device
(PLC-2 emulation)
• Peer-to-peer Read/Write on a remote network to a PLC-5 processor
• Peer-to-peer Read/Write on a local network to Modbus slave devices
In addition, the following configuration option is available on SLC 5/05
processors.
• Peer-to-peer Read/Write Multihop from Ethernet to a Logix processor
(ControlLogix, FlexLogix, and CompactLogix), or other EtherNet/IP
device, or through ControlLogix gateway to ControlNet, DH+, or
DH-485.
MSG Instruction Parameters
Enter the following parameters when programming this instruction.
• Read/Write - Read indicates the local processor (processor in which
the instruction is located) is receiving data; write indicates the local
processor is sending data.
• Target Device identifies the type of device which responds to the MSG
command. Valid options are:
– 500CPU, if the target device is another SLC processor
– 485CIF, if the target device is a PLC-2 emulator device
– PLC-5, if the target device accepts PLC-5 commands
(1)
– Modbus, if the target device is configured as Modbus RTU Slave
(1)
SLC 5/03 and higher only.
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