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Chapter 17: Dynamic Data Exchange LogicPro User’s Guide

260 Watlow Anafaze Doc.# 28002-00 Rev 3.00

• Topic name — is a string that identifies a logical data

context. For LogicPro, this is a unique name that

identifies the resource. The actual resource is defined in

the .DDE file. The client application must specify a topic

name along with a service name when it attempts to

establish a conversation with a server.

• Item name — is a string that identifies a logical data

context. Items can be any pre-defined symbolic Variable

name. The Variable name in the user Program is used by

LogicPro as the item name.

For the client, these names are key for establishing a

conversation and receiving data from a server.

Installation

The LogicPro DDE Server is automatically installed at the

same time LogicPro is installed.

Starting the LogicPro DDE Application

To start the LogicPro DDE application:

1. Click the start button on the Windows task bar.

2. Select Programs.

3. Select Logicpro.

4. Select DDE Server.

Configuration

Before you can open a topic, you must configure the LogicPro

DDE Server. The major steps in this process are:

• Create LogicPro DDE Server

• Open the Server

• Configure the Server

To configure the LogicPro DDE Server:

1. Select the Configuration menu

2. Select Configuration. The DDE Configuration dia-

log box appears.

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Watlow LogicPro Manuale Utente Pagina 276