Festo PROFIBUD-DP, Elektronics Manual

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A. Technical appendix
A−6
Festo P.BE−CPV−DI02−EN en 0704NH
A.2 PROFIBUS−DP: C o mm i ss i o nin g w it h t h e g ene r a l DP mas te r
The Festo CPI system can be controlled from any PLC, PC or
industrial PC with a PROFIBUS−DP module in accordance with
EN50170.
Further information Read the information on the following themes in the
appropriate sections:
Module consistency, FREEZE and SYNC, identifiers:
section 2.1.4
GSD: section 2.2
A.2.1 Bus start
In order to commission the CPI system correctly, the DP master
must carry out the following functions in the sequence specified:
1. send parametrizing data (Set_Prm)
2. check configuration data (Chk_Cfg)
3. transfer input and output data (cyclic data exchange,
Data_Exchange)
4. read diagnostic information (Slave_Diag).
The composition and contents of the individual telegrams are
described in the following sections.