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ProWORX NxT User’s Guide

36 l Connecting to controllers: Overview

Connecting to controllers: Overview

ProWORX NxT can communicate with controllers in several ways. This

chapter explains how to configure NxT for several common types of network

connections:

Ÿ Modbus: Modicon’s master/slave protocol, standard on 984 and

many other controllers. Select this option if your computer is

connected to a controller’s Modbus port, either directly or through a

modem.

Ÿ Modbus through a modem: Controllers in remote locations can be

equipped with RS-232 modems. Your computer can then connect to

the controller (by telephone, radio, or microwave systems) using its

own modem. Once the connection is established, the computer and

controller behave as if they were connected directly through a

Modbus network.

Ÿ Modbus Plus: Modicon’s fast peer-to-peer protocol, standard on

many 984 and other controllers. Select this option if your computer is

connected to a Modbus Plus network through a network adapter card

such as an SA85.

Ÿ Ethernet Gateway: A gateway connects two networks that would not

normally be able to communicate with each other. NxT supports

Modicon’s EMBP Gateway, which bridges your computer’s TCP/IP

Ethernet to the controller’s Modbus Plus network.

Ÿ TCP/IP: Some controllers can be equipped with TCP/IP cards. Select

this option if both your computer and controller use TCP/IP

networking, regardless of whether they are on the same network or

are connected by a gateway.

This chapter also describes how to select and attach to a controller, both

directly, and by scanning your entire network for devices.

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Schneider Electric Modbus Plus Network Bridge Multiplexer none Instrukcja Użytkownika Strona 2