Parameter Data Area (Pkw); Process Data Area (Pzd) - Siemens Micromaster Profibus Instruction Manual

PKE IND
st nd rd
1 2 3
word word word
332
PPO2
332
PPO4
PPO5
PKW: Parameter identifier value
PZD: Process data
PKE: Parameter identifier
IND: Index
PWE: Parameter value
Fig. 3-2 Parameter process data object (PPO types)
The useful data structure has been subdivided into the PKW and PZD areas in
order to satisfy different functional requirements of the communication system.
The PKW (parameter identifier value) telegram section can be used to monitor
and/or change any parameter in the converter. The request/response identifier
mechanisms required to do this are described in Section 3.4 "PKW mechanism".
Control words and setpoints (requests: Master → converter) and status words and
actual values (responses: Converter → master) can be transmitted in the process
data area.
The transferred process data do not take effect until the bits used in the control
words, setpoints, status words and actual values have been routed in the converter
as described in Section "Process data connections" of the reference manual.
PROFIBUS Optional Board
6SE6400-5AK00-0BP0
PZD1 PZD2
PWE STW1 HSW
ZSW1 HIW
th st nd
4 1 2
word word word
STW:
ZSW:
HSW:
HIW:
Operating instructions
PZD3 PZD4 PZD5 PZD6 PZD7
rd th th th
3 4 5 6
word word word word
Control word 1
Status word 1
Main setpoint
Main actual value
PZD8 PZD9 PZD10
th th th th
7 8 9 10
word word word word
19