User`s guide

Using PCIS-DDE With InTouch • 23
3.2 Monitor the Communication Status of
Modules
For each board being used, there is a built-in discrete item, Status, that
you can use to monitor the state of the communications with NuDAQ
PCI-bus data acquisition cards. Status is set to "0" when communications
with the device fails and set to "1" when communications is successful.
From InTouch, you can read the state of the communications by defining a
tagname and associating it with the topic configured for the device by using
the word Status as the item name. The following figure is an example of
Tagname Definition for monitoring the status of all communication to a
NuDAQ PCI-bus data acquisition card in InTouch.
From Excel, you can read the status of the communications by entering
the following formula in a cell:
=PciDDE|TopicName!'STATUS'