User`s guide

18 • Using PCIS-DDE With InTouch
Enter the Tagname in this field. (The tagname defined here
is the name InTouch will use. The PCIS-DDE server does
not see this name. The item name that PCIS-DDE server
uses is defined in Item Name field, an input field in Details
box).
Click on this button to select the tag type. The Tag Types
dialog box is as follows:
To access PCIS-DDE server items, the type of Tagname should be I/O
type.
There are four I/O types. They are briefly described in the following:
l I/O Discrete
Discrete input/output tagname with a value of either 0 (False, Off)
or 1 (True, On).
l I/O Integer
A 32-bit signed integer value between -2,147,483,648 and
2,147,483,647.
l I/O Real
Floating (decimal) point tagname. The floating point value may be
between -3.4e
38
and +3.4e
38
. All floating point calculations are
performed with 64-bit resolution, but the result is stored in 32-bit.
l I/O Message
Text string input/output tagname that can be up to 131 characters
long.