No-Protocol Communications - Omron CP1L CPU UNIT - 06-2007 Operation Manual

Serial Communications
Protocol
Peripheral CX-Programmer
bus (toolbus)
RS-232C
1:1 NT Links OMRON PTs (Programmable Terminals)
NS-series PT
RS-232C
1:1 Links
CP1L CPU Unit
6-3-2

No-protocol Communications

346
Connected devices
Personal computer running
the CX-Programmer
Peripheral bus (toolbus)
CP1L CPU Unit
C-series CPU Unit
CPM1A-V1
CPM2@
CQM1H
C200HX/HG/HE
RS-232C
1:1 Link
No-protocol communications enable sending and receiving data using the
TRANSMIT (TXD(236)) and RECEIVE (RXD(235)) instructions without using
a protocol and without data conversion (e.g., no retry processing, data type
conversion, or process branching based on received data). The communica-
tions mode for the serial port must be set for no-protocol communications in
the PLC Setup.
No-protocol communications are used to send data in one direction to or from
standard devices that have an RS-232C or RS-422A/485 port using TXD(236)
or RXD(235).
Description
Provides high-speed communi-
cations with the CX-Program-
mer.
(Remote programming through
modems is not supported.)
Enables data exchange with a
PT without communications
programming in the CPU Unit.
(The 1:N NT Link protocol is
used for communications even
for 1:1 connections.)
Enables linking data in a 64-
word Link Area between two
PLCs connected by an RS-
232C cable.
Section 6-3
Serial Serial
port 1 port 2
OK OK
OK OK
OK OK