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Annexes
Annex C - iPar Service
The PROFINET fieldbus module is compliant with iPar server function.
This is managed by the function block FB24 "IPARSERV".
The purpose of this function is to save (upload) the parameters (iParameter) of any PROFIBUS DP slave,
PROFINET I/O device, or module within the same host controller that is maintaining the GSD-based
parameters and diagnosis messages.
This allows, for example, fast device replacement due to maintenance or repair.
The function block can restore (download) the iParameter set to the component upon its request.
The principle is shown on the figure below; circled numbers are presenting the actions.
Per upload request, the function block reads the data record with the iParameter out of the drive, creates a
data block, and stores the data record therein.
Per download request, the function block uses the data block and writes down a data record to the drive.
The FB is instantiated once per component. It must be invoked within OB1 and additionally in OB 100 (the
start-up OB).
With PROFINET I/O, a device sends a request to save or restore iParameter set to the host controller via a
new "ALARM", called "Upload&Retrieval" (UserStructureIdentifier = 0x8201).
With a PROFINET I/O device, the function block FB 24 must additionally be invoked within OB 56 (the "Update
Alarm" OB).
To configure iPar function, the Diagnostic address of Slot 0 of the device shall be used.
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HRB25668 10/2013