NAiS FP Series, User Manual

Page: 198 / 326

FP
Σ
9.5 1:N Communication
9 - 31
9.5 1:N Communication
This section explains about the 1:N communication of general-purpose serial
communication.
9.5.1 Overview of 1:N Communication
The FP
Σ
and the external unit with the unit number are connected using an RS485
cable. Using the protocol that matches the external unit, the F159 (MTRN) instruction
is used to send and receive data.
FP
Σ
Data register (DT)
RS485
Received data
Data is received into received buffer.
Transmitted data Data transmission using F159 (MTRN) instruction
Data is sent and received
through the data registers.
Figure 196: FP
Σ
General-purpose serial communication (1:N communication)
9.5.2 Communication Cassette Used with 1 : N Communication
The following types of communication cassettes can be used with 1: N general-purpose
serial communication.
Name Description Part No.
FP
Σ
Communication cassette
1-channel RS485 type
This communication cassette is a 1-channel unit with a
two-wire RS485 port. It supports 1 : N computer links (C-
NET), general-purpose serial communication, and a PLC
link.
FPG-COM3