Descriptions of functions
10.3 Communication according to PROFIdrive
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
449
Determining the drive object numbers
Further information about the drive system (e.g. drive object numbers) can be determined as
follows using parameters p0101, r0102, and p0107/r0107:
1. The value of parameter r0102 ("Number of drive objects") for drive object/axis 1 is read
via a read request.
Drive object 1 is the Control Unit (CU) which is a minimum requirement for each drive
system.
2. Depending on the result of the initial read request, further read requests for drive object 1
are used to read the indices for parameter p0101 ("Drive object numbers"), as specified
by parameter r0102.
Example:
If the number of drive objects is "5", the values of indices 0 to 4 of parameter p0101 are
read. Of course, the relevant indexes can also be read at once.
Note
The first two points provide you with the following information:
The number of drive objects that exist in the drive system
The numbers of the existing drive objects
3. Following this, parameter r0107/p0107 ("Drive object type") is read for each drive object
(indicated by the drive object number).
Depending on the drive object, parameter 107 can be either an adjustable parameter or a
display parameter.
The value in parameter r0107/p0107 indicates the drive object type. The coding for the
drive object type is specified in the parameter list.
4. As of here, the list of parameters applies to the particular drive object.
Example 1: Read parameters
Requirements
● The PROFIdrive controller has been commissioned and is fully operational.
● PROFIdrive communication between the controller and the device is operational.
● The controller can read and write data sets in conformance with PROFIdrive DPV1.
Following the occurrence of at least one fault (ZSW1.3 = "1") on object drive 2, the active
fault codes must be read from the fault buffer r0945[0] ... r0945[7].
The request is to be handled using a request and response data block.
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