Omron CP1L - 12-2007, Operation Manual

Page: 375 / 673

342
Serial Communications
Section 6-3
6-3 Serial Communications
6-3-1 Overview
The CP1L CPU Units support the following serial communications functions.
Protocol Connected devices Description Serial
port 1 Serial
port 2
No-protocol Standard devices supporting serial communications 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. OK OK
Serial gate-
way (to
Compo-
Way/F or
Modbus-
RTU) OMRON components supporting CompoWay/F or Mod-
bus-RTU slave devices Converts received FINS com-
mands into CompoWay/F or
Modbus-RTU commands and
transfers them on the serial
communications path. OK OK
CP1L CPU Unit
Standard device with
serial communications
RS-232C or RS-422A/485
CP1L CPU Unit
RS-485 (CompoWay/F or Modbus-RTU)
OMRON CompoWay/F-compliant components
or Modbus-RTU slave devices