HEIDENHAIN PROFIBUS-DP (DPV0) - Manual (Page 31)

Encoder and Gateway functionality, DPV0
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5 Encoder and Gateway functionality, DPV0
5.1 Basic functionality
The picture below gives an overview of the basic encoder and
gateway functions and how the functionality is conducted within
the device.
Figure 13 Basic functionality
5.2 PROFIBUS data transfer principle
The PROFIBUS-DP devices can be configured and parameters
can be set according to the user’s needs.
In this context it is useful to know that with PROFIBUS there are
different types of data transmission.
5.2.1 During Configuration (DDLM_Chk_Cfg mode)
The configuration function allows the DP-Master to send the
configuration data to the DP-device for checking. The main
purpose is to define the number of bytes used for Data_Exchange
function.
5.2.2 During Parameterization (DDLM_Set_Prm mode)
When the system is started, the PROFIBUS devices are
parameterized (DDLM_Set_Prm mode), i.e. the encoder class set
by means of the GSD file in the configuration tool) and the set
operating parameters are transferred to the respective slave.