Operation
6.6 Communication according to PROFIdrive
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
233
Determining the drive object numbers
Further information about the drive system (e.g., drive object numbers) can be determined
as follows from parameters p0101, r0102 and p0107/r0107:
1. The value of parameter r0102 ("Number of drive objects") is read via a read request from
drive object 1.
The drive object with drive object number 1 is the Control Unit (CU), which is always
present in every drive system, as a minimum.
2. Depending on the result of the initial read request, further read requests to drive object 1
are used to read the indices of 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. The relevant indices can also be read at once. The relevant indices can also be
read at once.
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.
Example 1: Reading parameters
Preconditions
● 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 PROFINET/PROFIBUS.
Following the occurrence of at least one fault (STW1.3 = "1") on drive 2 (also drive object
number 2), the active fault codes are to be read from the fault buffer r0945[0] ... r0945[7].
The request is to be handled using a request and response data block.
1. Create a request to read the parameters.
2. Invoke request.
3. Evaluate response.
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