Watlow LogicPro Manual de usuario descargar pdf (Pagina 282)

Chapter 17: Dynamic Data Exchange LogicPro User’s Guide

266 Watlow Anafaze Doc.# 28002-00 Rev 3.00

NOTE! You must exit LogicPro to free the communica-

tion channel or an error box will appear when the

LogicPro DDE is started.

Setting Up Excel to Read

Using the spreadsheet as a sample, the DDE Server reads the

Variables and places their values in the specified cells. The

spreadsheet reads Variables and shows a chart reflecting those

values, as shown in Figure 17.2.

Figure 17.2 Spreadsheet Example

To specify a specific Variable inside the controller, call the

LP_DDE Server and request the data. In the DDE Server, use

Topic1 which you configured earlier. Topic1 uses the .FPR

file for the configuration of the controller.

Excel provides an easy way to read a value from a DDE and

place it into a cell. The correct format is:

=SERVER NAME|TOPIC NAME|ITEM NAME

• Server Name— LP_DDE. This is the executable file

name for the LogicPro DDE server.

• Topic Name — the name that was assigned at the New

Topic dialog box.

• Item Name — the symbolic Variable name that is used

in the Program.

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Watlow LogicPro Manual de usuario Pagina 282