Siemens SINAMICS S120 Function Manual page 350

Communication PROFIBUS DP/PROFINET IO
10.1 Communications according to PROFIdrive
The telegram structure
The parameter p0978 contains the sequence of DOs that use a cyclic PZD exchange. A zero
delimits the DOs that do not exchange any PZDs.
If the value 255 is written to p0978, the drive unit emulates an empty drive object that is
visible to the PROFIdrive controller. This permits cyclic communication of a PROFIdrive
controller
● with unchanged configuration to drive units that have a different number of drive objects.
● with deactivated DOs without having to change the project.
Note
• The following must apply to ensure conformity with the PROFIdrive profile:
• One PZD = one word.
• Physical word and double word values are inserted in the telegram as referenced
Structure of the telegrams
Figure 10-5 Overview of standard telegrams and process data
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– Interconnect PZD receive word 1 as control word 1 (STW1).
– Interconnect PZD send word 1 as status word 1 (STW1).
Use WORD format for PZD1.
Only one of the interconnection parameters (p2051 or p2061) can have the value ≠ 0
for a PZD word.
variables.
p200x are relevant as reference values (telegram contents = 4000 hex or
4000 0000 hex for double words if the input variable has a value of p200x).
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Drive Functions