Omron CP1E CPU UNIT SOFTWARE - Overview of Serial Communications

14-3
14 Serial Communications
CP1E CPU Unit Software User’s Manual(W480)
14-1 Serial Communications
14
14-1-2 Overview of Serial Communications
The CP1E CPU Units support the following types of serial communications.
14-1-2 Overview of Serial Communications
Connected devices Description
Communications
protocol
Built-in
RS-232C
Optional
serial port
Programmable Terminal Data can be exchanged with
PTs without using a communi-
cations program in the CPU
Unit.
Note Only one PT can be con-
nected when using a 1:N
NT Link. It is not possible
to connect two PTs.
1:N NT Links
(Host Link is also
supported.)
OK OK
General component Communicates with general
devices, such as barcode
readers, with an RS-232C or
RS-422A/485 port without a
command-response format.
The TXD and RXD instructions
are executed in the ladder pro-
gram in the CPU Unit to trans-
mit data from the transmission
port or read data in the recep-
tion port.
No-protocol
communications
OK OK
Modbus-RTU slave devices, such as invert-
ers (Modbus-RTU Easy Master)
Data can be easily exchanged
with general devices that sup-
port Modbus-RTU slave func-
tionality (such as inverters)
and are equipped with an RS-
232C port or RS-422A/485
port.
Modbus-RTU Easy
Master Function
OK OK
Data links between CPU Units Data links can be created for
up to nine CP-series or CJ1M
CPU Units, including one Poll-
ing Unit and up to eight Polled
Units. Up to 10 words can be
shared per Unit.
*1
Serial PLC Links OK OK
CP1E
RS-232C
NS/NP-series PT
NT Link
CP1E
RS-232C or RS-422A/485
General device with
serial communications
CP1E
RS-232C or RS-422A/485
RS-422A/485 Option Board
Inverter
RS-422A/485
CP1E CPU Unit Polling Unit
RS-422A/485 Option Board
Shared data
CP1E CPU Unit Polled Unit CP1L CPU Unit Polled Unit