WAGO I/O SYSTEM 750 XTR
Commissioning
95
750-333/040-000 FC PROFIBUS G2 12MBd XTR
Manual
Version 1.4.0
8.5.3
Parameterization on demand
The DP/V0 parameter assignment message makes its specific parameter sets
available before commencing cyclical active data exchange; this information is
also provided to the fieldbus coupler and attached I/O modules.
The fieldbus coupler can have the role as a station proxy.
The user makes the settings based on the GSD file as part of planning and are
made available to the station for each connection by the DP master. This ensures
that each component is supplied with the configured parameter set before
commencement of operations even in the event of a required exchange.
Based on the fact that the DP/V0 parameter assignment message can only have
244 bytes of information in total for the entire station (fieldbus coupler and up to
63 I/O modules), this type of parameterization is not well suited for very complex
I/O modules.
With the approach of the parameterization on demand also referred to as iPar
Server, the PROFIFUS and PROFINET user organization offers the opportunity
to store complex parameter structures of I/O modules on the main controller
during start-up, and if necessary, generally after replacement of a component to
make it available again.