Omron Host-Link; General Information; Hardware; Telegram Mode - Omron NT4S Operation Manual

Linking to OMRON Controllers
6 Linking to OMRON Controllers
6.1

OMRON Host-Link

6.1.1

General Information

6.1.1.1

Hardware

6.1.1.2

Telegram Mode

6.1.1.3

Point-to-Point Connection

6.1.1.4

Multiple Point Connection

6.1.2

Protocol Parameters

6.1.2.1

Parameters of SER1

TesiMod operating terminals can be conveniently connected to all controllers that
support the OMRON Host-Link protocol. The OMRON Host-Link protocol allows
communication between one operating terminal and up to 32 controllers.
The interface channel SER1 RS232 is used to connect the operating terminals to a
OMRON controller.
The operating terminal always has a client functionality which means that data
transfers are always initiated by the terminal.
RS232 interfaces allow only point-to-point connections.
Therefore the operating terminals can be set to Single-Mode or Multiple-Mode. The
selected mode must be equal to the mode set for the controller.
Most of the OMRON controllers are used with Multiple-Mode and cannot be ad-
justed
In the telegram mode Multiple-Mode the terminal can be connected to at least 32
controllers using multiple point connection.
In this case the terminal must be connected via the communication module NT-
AL001 with the RS422-Bus.
A direct connection with the RS485 interface of SER2 of the terminals is not permis-
sible due to a lack of terminator possibilities.
Parameters that can be defined for the communication interface SER1 are as fol-
lows:
Baud rate: 300, 600, 1200, 2400, 4800, 9600, 19200
Data bits: 7, 8
Parity: even, odd
Stop bits: 1, 2
Handshake: no handshake
Default values in the programming software are in bold print.
Section 6-1
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