User guide

Using the Message Instruction
13–1
13 Using the Message Instruction
This chapter contains information about communications and the message (MSG)
instruction. Specifically, this chapter contains information on:
• types of communication
• what the MSG instruction symbol looks like
• typical execution time for the MSG instruction
• how to use the MSG instruction
• application examples and timing diagrams
Note Only Series C or later Micr oLogix 1000 discr ete contr ollers and all Micr oLogix
1000 analog contr ollers support the MSG instruction.
Message Instruction
Instruction
Purpose
Page
Mnemonic Name
Purpose
Page
MSG
Message
Read/Write
This instruction transfers data from one node to
another via the communication port. When the
instruction is enabled, the message is sent to a
communication buffer. Replies are processed a
t t he
end o
f s can.
13–3
Programming