Omron V320-F Series Connection Manual page 56

9.1.1. Communications Data Flow
This is the flow from issuing command data from the PLC (SCU unit) to the code reader
through serial communications and receiving response data from the code reader.
1. Communications Sequence
Execution Processing
2. Command Send Processing
3. Response
Processing
9.1.2. PMCR Instruction and Send and Receive Messages
This section describes the PROTOCOL MACRO instruction (Mnemonic: PMCR, hereinafter
abbreviated as "PMCR instruction") and the general movement of send and receive
messages.
Note
For details, refer to Serial Communications Instructions (PMCR) in Section 3 Instructions in
the CJ-series Instructions Reference Manual (Cat. No. W474).
● PMCR Instruction Operand Data
The PROTOCOL MACRO instruction (Mnemonic:
PMCR) for the sequence number specified in the
program is executed to call the communications
sequence (protocol macro data) registered in the SCU
unit.
▼
Based on the sequence number specified in step 1,
the SCU unit issues a send message (command data)
to the code reader.
▼
Receive The SCU unit stores the receive message (response
data) received from the code reader in the internal
memory of the specified CPU Unit.
9. Program
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