Maple Systems Silver Plus Series Installation And Operation Manual page 119

Cre ating Win dows
2. Click New.... The PLC Control dialog appears.
3. Select the Device type and Device Address for the actual PLC address you wish to monitor.
4. Select the format from the drop down menu (16-bit or 32-bit unsigned, signed or BCD).
5. Click OK to return to the PLC Control Object dialog box.
6. You will see a new entry that lists the PLC address that is monitored by the OIT.
The PLC must only enter window numbers that represent full size windows when using the PLC Control Object
function. The OIT automatically closes any open windows before the window called by the PLC Control Object is
displayed.
The Direct and Indirect Window Objects
If you want the PLC to call up a popup window that is to be overlaid on top of other windows already open, then
there are two methods used to do this:
• Direct Window Object
• Indirect Window Object
The Direct Window Object is used to display a popup window using a PLC coil. The OIT continuously reads the
value of the PLC coil to determine if it is set to 1. If so, then the predefined popup window is displayed.
The Indirect Window Object is used to display a popup window using a PLC data register. Similar to the PLC
Control Object, the OIT continuously monitors the selected PLC data register. It will display any popup window
that corresponds to the number placed into the PLC data register by the PLC.
The PLC must reference a window that is less than full size when using the Direct Window and Indirect Window
objects.
The OIT will write the number of the newly-displayed window to the next consecutive
address after the address specified in this step.
Unlike the PLC Control Object, the Direct and Indirect Window Objects are only active
for the windows into which they are placed.
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