Commissioning; Data Communication Via Profibus-Dp; Structure Of The User Data In The Profibus-Dp Message Frame - Siemens CB15 Operating Instructions Manual

PROFIBUS MODULE (CB15/CB155)

5. COMMISSIONING

5.1 Data Communication via PROFIBUS-DP

The structure of the user data is designated as parameter process data objects (PPO) in the PROFIBUS variable
speed drives profile:
Protocol Frame
(Header)
Figure 2: Structure of the User Data in the PROFIBUS-DP Message Frame
There is user data with a parameter area (PKW) and a process data area (PZD) and user data that consists
exclusively of process data. The PROFIBUS variable speed drives profile defines five PPO types. The PPO type is
defined in the PROFIBUS-DP master parameter settings.
PKW
PKE IND
1st 2nd
Word Word
PPO1
PPO2
PPO3
PPO4
PPO5
PKW: Parameter identifier value
PZD: Process data
PKE: Parameter identifier
IND: Index
PWE: Parameter value
STW1: Control word 1
ZSW1: Status word 1
HSW: Main setpoint
HIW: Main actual value
Figure 3: Parameter Process Data Object (PPO Types)
Note
The CB15/CB155 only supports PPO types 1 and 3.
Parameter (PKW)
PZD
PWE PZD1 PZD2
STW1 HSW
ZSW1 HIW
3rd 4th 1st Word 2nd
Word Word Word
U s e r D a t a
Process Data (PZD)
PZD PZD PZD PZD
3 4 5
3rd 4th 5th
Word Word Word
14
Operating Instructions
Protocol Frame
(Trailer)
PZD PZD PZD
6 7 8 9
6th 7th 8th 9th
Word Word Word Word
English
PZD1
0
10th
Word