Profichip VPC3+C User Manual page 36

6 PROFIBUS DP Interface
Figure 6-1: DP_SAP Buffer Structure
The VPC3+C first stores the parameter telegrams (Set_Slave_Add and
Set_(Ext_)Prm) and the configuration telegram (Chk_Cfg) in Aux-Buffer 1
or Aux-Buffer 2. If the telegrams are error-free, data is exchanged with the
corresponding target buffer (Set_Slave_Add-Buffer, Parameter-Buffer and
Config-Buffer). Each of the buffers to be exchanged must have the same
length. In the R_Aux_Buf_Sel parameter cell (see Figure 6-2) the user
defines which Aux_buffers are to be used for the telegrams mentioned
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UART
Revision 1.03
D N
N-U changed
D-N changed
by User
by VPC3+
D N
D
Aux
1/2
Aux
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VPC3+C User Manual
Copyright © profichip GmbH 2004-2006
Dout-Buffer
U
Din-Buffer
U
Diagnosis-
U
Buffer
Read_Config-
Buffer
changed by User
Config-Buffer
Set-Slave-
Address-Buffer
Parameter-
Buffer