GE Industrial Solutions AF-600 FP Profibus DP - Manual (Page 43)

PROFIBUS DP services are activated via specific Service Access Points (SAP). For acyclical communication, the following SAP are specified:
Master SAP Slave SAP Meaning
50 (32H) 49 (31H) Master Class 2: Initiate request
50 (32H) 0..48 (0..30H) Master Class 2: Abort, Read, Write, Data transfer
51 (33H) 50, 51 (32H, 33H) Master Class 2: Alarm
51 (33H) 51 (33H) Master Class 2: Read, Write
5.2.6 How to Use the DP V1 Features for Parameter Access
This section describes how DP V1 can be used for accessing drive parameters.
For units as complex as frequency converters, the standard PROFIBUS DP V1 read and write services are not sufficient for accessing the many parameters and
attributes in the drive. For this reason, the PROFIdrive Parameter Channel is defined. Using this parameter Read/Write is performed by addressing a single DP V1
object in the frequency converter, in the following way:
Slot = 0
Index = 47
The message has the following general structure:
PROFIBUS
Message
Header Data Unit PROFIBUS Message
Trailer
DP V1
Command/response PROFIdrive V3.0 Parameter Channel
DU
0 DU
1 DU
2 DU
3 Req. / Res. Header Data
The DP V1 command/response part is used for the standard DP V1 read/Write on the Slot 0, Index 47 data block.
The PROFIdrive V3 Parameter Channel is used to access specific parameter data in the drive.
AF-650 GP/AF-600 FP Profibus DP Operating Instructions
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