Omron CQM1H-SCB41 Operation Manual page 79

Overview of the Protocol Macro Functions
Modifying Standard
System Protocols
CPU Unit
Sequence
number
I/O memory
Creating a New Protocol
CPU Unit
Sequence
number
I/O memory
64
If there is no standard system protocol for the required OMRON product or
you wish to modify part of the protocol, you can use the CX-Protocol to modify
a standard system protocol, transfer this as a separate communications
sequence to the Serial Communications Board, and execute the PMCR( )
instruction.
Modifying and transferring
standard system protocols
Serial Communications Board
Modified standard
system protocol
Sequence No.
specification
Step 0
Step 1
Step 2
Shared memory
I/O refreshing
When connecting a general-purpose external device that has an RS-232C or
RS-422A/485 port, use the CX-Protocol to create a new protocol containing
the communications specifications for the general-purpose external device,
transfer these specifications to the Serial Communications Board, and exe-
cute the PMCR( ) instruction.
Creating and transferring a new protocol
Serial Communications Board
Newly created protocol
Step 0
Sequence No.
specification
Step 1
Step 2
Shared memory
I/O refreshing
Command execution (SEND, RECEIVE,
SEND&RECEIVE)
Messages
RS-232C or
RS-422A/485
General-purpose external device
Command execution (SEND, RECEIVE,
SEND&RECEIVE)
Messages
RS-232C or
RS-422A/485
General-purpose external device
Section 5-1