ProSoft Technology AN-X-PB - Manual (Page 33)

AN-X-PBSLV Page 27
January 2008
Connection Parameters
12. Set the module’s Requested Packet Interval (RPI). This is how often
the module’s scheduled data is updated in the processor. The value
can range from 5.0 to 3200.0 ms.
13. Click Finish >> to complete the module configuration.
All connections to the module must have the same lengths and RPIs.
Selecting the RPI
When you create an exclusive owner or input only connection to the
AN-X-PBSLV, you must enter a requested packet interval (RPI), the
period at which the data updates.
Consider the PROFIBUS network update rate when selecting a value.
There’s no point in setting the RPI to be much faster than the
PROFIBUS network update time. AN-X will just resend the same data
and add to the Ethernet traffic.
Mapping the PROFIBUS Data
You define the PROFIBUS data that is exchanged between the AN-X
and the ControlLogix processor in a comma-delimited text file, which
can be created using a spreadsheet such as Excel or with a text editor.