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14-1-2 Overview of Serial Communications
The CP1E CPU Units support the following types of serial communications.
Connected devices
Programmable Terminal
NS/NP-series PT
RS-232C
NT Link
CP1E
General component
CP1E
RS-232C or RS-422A/485
General device with
serial communications
Modbus-RTU slave devices, such as invert-
ers (Modbus-RTU Easy Master)
CP1E
RS-422A/485 Option Board
RS-232C or RS-422A/485
Inverter
Data links between CPU Units
CP1E CPU Unit Polling Unit
RS-422A/485 Option Board
RS-422A/485
Shared data
CP1E CPU Unit Polled Unit
CP1L CPU Unit Polled Unit
CP1E CPU Unit Software User's Manual(W480)
Description
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.
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.
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.
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
*1
shared per Unit.
14 Serial Communications
Communications
Built-in
protocol
RS-232C
1:N NT Links
OK
(Host Link is also
supported.)
No-protocol
OK
communications
Modbus-RTU Easy
OK
Master Function
Serial PLC Links
OK
Optional
serial port
OK
OK
14
OK
OK
14-3
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