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Operation
6.7 Communication according to PROFIdrive
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 (no pipelining).
● A parameter request/parameter response must fit into a data set (e.g. PROFIBUS:
max. 240 bytes).
● The request or the response header is user data.
6.7.4.1
Structure of requests and responses
Structure of parameter request and parameter response
Table 6- 18
Structure of the parameter request
Parameter request
Values for
Request header
write access
only
1st parameter address
...
nth parameter address
1st parameter value(s)
...
nth parameter value(s)
324
Request reference
Axis
Attribute
Parameter number
Subindex
Attribute
Parameter number
Subindex
Format
Values
...
Format
Values
...
Request ID
Number of parameters
Number of elements
Number of elements
Number of values
Number of values
Converter cabinet units
Operating Instructions, 11/2017, A5E36652151A
Offset
0
2
4
6
8
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