Determining The Axis/Drive Object Numbers - Siemens SINAMICS S120 Installation And Start-Up Manual

Communication via PROFIBUS
Acyclic communication
Table 4-17 Error values in DPV1 parameter responses, continued
Error Meaning
value
0xC9 Above the valid values.
0xCC Write access not permitted.
4.4.3

Determining the axis/drive object numbers

Further information about the drive system (e.g. axis 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/axis 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 for indices 0 to 4 for parameter
p0101 are read.
Note
The first two points provide you with the following information:
S
The number of drive objects in the drive system
S
The numbers of the existing drive objects
4-130
Comments
Modification request for a value that, although
within "absolute" limits, is above the currently
valid upper limit (e.g. governed by the current
converter rating).
Write access is not permitted because an
access key is not available.
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
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