Schneider Electric Modbus Plus Network Bridge Multiplexer none Manual do Utilizador descarregar pdf (Página 12)

ProWORX NxT User’s Guide

46 l Selecting a device on the network

Selecting a device on the network

Before you can start programming, reading, or writing logic in the Online

Editor, you must first select or attach to the controller you want to work with.

Selecting a controller connects your PC to it so the Online Editor can read its

ladder logic, Traffic Cop information, and configuration, and write your

changes back to it. Unless you have selected Confirm Address on Entry in the

database’s setup, opening a database in the Online Editor connects you

automatically to its controller.

v For more information, see “Editing the setup of a database” on

page21.

You do not have to select a device to work in the Offline Editor because the

controller’s information is already stored in its database. You need to attach to

a controller only when you want to read its ladder logic, write changes to it,

monitor its health, or compare its logic to a database.

If your computer connects to your network through a Dial-Up or Dial-Chat

modem (and you do not have an active connection), NxT asks you for a phone

number to dial when you select a device. If your computer has a direct

connection to your network, the Select Device dialog box appears

immediately.

You cannot see or edit descriptors in the Online Editor unless you open a

controller’s database as well as attach to it. Also, changes made to a controller’s

logic as you work online do not appear in its database until they are read into it.

v For more information, see “Reading from a controller” on page112.

Ensure your communications setup is configured correctly before trying to select

a device.

v For more information, see “Setting up communications for your PC” on

page37.

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Schneider Electric Modbus Plus Network Bridge Multiplexer none Manual do Utilizador Página 12