Serial Communications - Omron CP1L Operation Manual

Serial Communications

6-3 Serial Communications
6-3-1 Overview
Protocol
No-protocol Standard devices supporting serial communications
Serial gate- OMRON components supporting CompoWay/F or Mod-
way (to bus-RTU slave devices
Compo-
Way/F or
Modbus-
RTU)
366
The CP1L CPU Units support the following serial communications functions.
Connected devices
CP1L CPU Unit
RS-232C or RS-422A/485
Standard device with
serial communications
CP1L CPU Unit
RS-485 (CompoWay/F or Modbus-RTU)
OMRON CompoWay/F-compliant components
or Modbus-RTU slave devices
Description
Communicates with standard
devices with an RS-232C or
RS-422A/485 port without a
command–response format.
Instead the TXD(236) and
RXD(235) instructions are exe-
cuted from the program to
transmit data from the trans-
mission port or read data in the
reception port. The frame
headers and end codes can be
specified.
Converts received FINS com-
mands into CompoWay/F or
Modbus-RTU commands and
transfers them on the serial
communications path.
Section 6-3
Serial Serial
port 1 port 2
OK OK
OK OK