Getting Started with IWS and TwinCAT Contents - InduSoft

DRAFT — 8 September 2006 Getting Started with IWS and TwinCAT
Building the Driver Worksheet
Generally speaking, driver worksheets are used to associate database tags in IWS with device registers
in your PLC or I/O. When the worksheets are processed during runtime, each tag/register
association is scanned and the values are updated, as needed. You can build multiple worksheets in
order to control which tag/register associations are scanned under what circumstances.
For a complete discussion about building driver worksheets, please consult the IWS User Guide. For
driver-specific syntax and parameters, please consult the TWCAT driver document (TWCAT.pdf)
that was installed with the driver files in the \DRV directory (see page 7).
To build a basic driver worksheet for the TWCAT driver:
1) In the Workspace, expand the TWCAT driver folder and select MAIN DRIVER WORKSHEET. Rightclick
on the worksheet and select Open from the pop-up menu.
The worksheet is opened for editing:
Figure 50: Opening the Main Driver Worksheet
Figure 51: TWCAT Main Driver Worksheet
The Disable, Read Completed, Read Status, Write Completed, and Write Status fields are used for checking
read/write status and logging runtime errors. They’re not necessary for this sample application,
so you can proceed directly to making your first tag/register association.
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