PLC
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ï‚· Fieldbus_Variables: - This group contains the fieldbus mapping. See chapter: Fieldbus Interface.
ï‚· Digital_In_Out: - This group contains variables only for digital I/O. Unlike the Shared_Variables
group, these signals are not shared with fieldbus.
The programming of the PLC logic can be done in two ways: - using functional blocks or ladder logic. In
both cases you use a graphical editor. Below is given two examples of this.
After editing the program you must compile it before it can be downloaded. This is done using the item
Make in the menu Build. If your program contains any errors you will be informed about them.
When the program is successfully compiled it is possible to download to the target system. This is
normally done as follows:
1. First close the PowerMACS PLC.
2. If the WinTC already is on-line download the PLC project by selecting the menu item PLC –
Synchronize. During synchronization a status form is shown se Display PLC Status.
3. If the WinTC is not on-line then just go on-line
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