The project in the PLC is written to control the end device. Provisions may also be made to accumulate useful information (for example - number of units made). Locations may also be reserved that are intended to receive information from the operator by using the display. At that point the PLC program's responsibility ends.
The Panelview, under direction of its program, will request from the PLC (via the communication link) the status of the items in the program and will write the operator's modifications (for example - Start, Stop, Number of Units To Produce). The Panelview is the originator of the communication. The PLC program only makes the information available.
When writing the RSView32 program it is easiest if the PLC with the control program loaded is connected via the communication link to your PC. Then, when the source or target of an item on the target PLC is defined (this definition is called the 'Tag'), the actual PLC can be scanned and the exact name retrieved from it.