Communication via PROFIBUS
Acyclic communication
4-130
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
Table 4-17 Error values in DPV1 parameter responses, continued
Error
value
Add.
informa-
tion
CommentsMeaning
0xC9 Above the valid values. 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).
-
0xCC Write access not permitted. Write access is not permitted because an
access key is not available.
-
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
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