Omron CP1L-L14D Series, Operation Manual

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Serial Communications Section 6-3
Auxiliary Area Flags
and Bits
The Modbus-RTU command set in the DM fixed allocation words for the Mod-
bus-RTU Easy Master is automatically sent when the Modbus-RTU Master
Execution Bit is turned ON. The results (normal or error) will be given in corre-
sponding flags.
6-3-4 Communications: Smart Active Parts and Function Blocks
Overview
OMRON components that support CompoWay/F communications or Modbus-
RTU slave functionality (such as Temperature Controllers) can be easily
accessed from a CP1L CPU Unit equipped with an RS-422A/485 or RS-232C
Option Board using Smart Active Parts (SAPs) on an NS-series PT or using
function blocks in the ladder program in the CP1L CPU Unit.
The communications mode in the PLC Setup must be set to the Gateway
Mode to enable this functionality.
Word Bit Port Contents
A640 00 M-type
CPU
Units:
Serial
port 2
L-type
CPU
Units:
Serial
port 1
Modbus-RTU Master Execution Bit
Turned ON: Execution started
ON: Execution in progress.
OFF: Not executed or execution completed.
01 Modbus-RTU Master Execution Normal Flag
ON: Execution normal.
OFF: Execution error or still in progress.
02 Modbus-RTU Master Execution Error Flag
ON: Execution error.
OFF: Execution normal or still in progress.
A641 00 M-type
CPU
Unit:
Serial
port 1 Modbus-RTU Master Execution Bit
Turned ON: Execution started
ON: Execution in progress.
OFF: Not executed or execution completed.
01 Modbus-RTU Master Execution Normal Flag
ON: Execution normal.
OFF: Execution error or still in progress.
02 Modbus-RTU Master Execution Error Flag
ON: Execution error.
OFF: Execution normal or still in progress.