How To Use The Dp V1 Features For Parameter Access - Danfoss FC 300 Profibus Manual

FC 300 Profibus
Master SAP Slave SAP
50 (32H) 49 (31H)
50 (32H) 0..48 (0..30H)
51 (33H) 50, 51 (32H, 33H)
51 (33H) 51 (33H)

How to Use the DP V1 Features for Parameter Access

This section describes how DP V1 can be used for accessing VLT 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 FC 300, in the following way:
Slot = 0
Index = 47
The telegram has the following general structure:
PROFIBUS Data Unit
DP V1
Telegram
Command/response
Header
DU
0
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 VLT.
For a detailed description of the DP V1 command handling, please refer to the PROFIBUS DP V1 Design
Guide, ref. MG.90.EX.YY.
DP V1 Read / Write Services
The table below shows the content of the DP V1 command / Response headers and their possible attributes.
DU Byte Value
0 Function number
0x48
0x51
0x56
0x57
0x58
0x5C
0x5E
0x5F
0xD1
0xD7
0xDC
0xDE
0xDF
1 Always zero
2 47
3 xx
4..n
44
How to Access FC 300 Parameters
Meaning
Master Class 2: Initiate request
Master Class 2: Abort, Read, Write, Data transfer
Master Class 2: Alarm
Master Class 2: Read, Write
PROFIdrive V3.0 Parameter Channel
DU DU DU Req. / Res. Header
1 2 3
Meaning
Idle REQ, RES
Data transport REQ, RES
Resource Manager REQ
Initiate REQ, RES
Abort REQ
Alarm REQ, RES
Read REQ, RES
Write REQ, RES
Data transport negative response
Initiate negative response
Alarm negative response
Read negative response
Write negative response
Slot number
Index
Data length
User data
MG.33.C2.02 - VLT is a registered Danfoss trademark
PROFIBUS
Telegram
Trailer
Data
Specified
DPV1
DPV1
DPV1
PNO Drive Profile V3.0