162 Communication protocol
Parameter data transfer examples (DP-V1)
The following examples show how parameter data is transferred
using the DP-V1 mechanisms READ and WRITE.
Note: Only the “data unit” part of the SD2 telegram is presented in
the examples. See PROFIBUS SD2 telegram for SAP 51 on page
153.
Example 1a: Reading a drive parameter (array element)
Drive parameters are addressed so that the drive parameter group
corresponds to the Parameter index (PNU), and the drive
parameter number within the group corresponds to the Subindex
(IND). In the following example, a value is read from drive
parameter number 12.04 (0C.04h).
• DP-V1 Write request (Read parameter value):
90h Illegal Request ID The request ID of the response is
illegal.
96h Internal buffer Buffer overflow
A0h Internal communication Communication error between the
module and the drive
DP
header
5F 01 2F 0A 05 01 01 01 10 01 00 0
C
00 04 DP
trailer
DP-V1
Command
PROFIdrive V3 Parameter Channel
Error # Meaning Used at
Function number
Slot number
Index
Data length
Request reference
Request ID (01h= Request Parameter
Drive object ID
Number of parameters
Attribute (10h = Value)
Number of elements
Parameter index
Subindex
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