Siemens SINAMICS S120 Series

Communication according to PROFIdrive
3.4 Acyclic communication
Communication
Function Manual, 12/2018, 6SL3097-5BD00-0BP0
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Characteristics of the parameter channel
● One 16-bit address exists for each parameter number and subindex.
● Concurrent access by several additional PROFIBUS masters (master class 2) or
PROFINET IO supervisor (e.g. commissioning tool).
● Transfer of different parameters in one access (multiple parameter request).
● Transfer of complete arrays or part of an array possible.
● Only one parameter request is processed at a time for each controller/device connection
(no pipelining).
● A parameter request/response must fit into a data set (e.g. PROFIBUS: Max. 240 bytes).
● The request or the response header is user data.
3.4.2 Structure of requests and responses
Structure of parameter request and parameter response
Parameter request
Offset
Values for
write access
only
Request header
Request reference
Request ID
0
Axis Number of parameters 2
1st parameter address
Attribute
Number of elements
4
Parameter number 6
Subindex
8
...
nth parameter address
Attribute
Number of elements
Parameter number
Subindex
1st parameter value(s)
Format
Number of values
Values
...
...
nth parameter value(s)
Format
Number of values
Values
...