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4.1 General information about PROFIBUS–DP
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E Siemens AG 2013 All Rights Reserved
SIMODRIVE POSMO A User Manual (POS1) – 08/2013 Edition
PNO Guideline, profile for ”variable–speed drives”
S Cyclic data transfer: PZD part
S Non–cyclic data transfer: PKW part
DP master class 1
(PLC, e.g. SIMATIC S7)
PROFIBUS–DP
DP slave
POSMO A
Fig. 4-1 Protocol for the ”DP slave POSMO A”
The structure of the net data for cyclic operation is designated in the
”PROFIBUS profile variable–speed drives” as parameter process data
object (PPO).
Reference: /P3/ PROFIBUS
Profile for variable–speed drives
The net data structure for cyclic data transfer is sub–divided into two
areas, which are transferred in each telegram.
S Process data area (PZD, process data)
This area contains the control words, setpoints and status informa-
tion and actual values.
The following data is transferred with the process data:
– Control words and setpoints (task: master ––> drive)
or
– Status words and actual values (responses: drive ––> master)
Description: ––> refer to Chapter 4.2
S Parameter area (PKW, parameter identification value)
This telegram section is used to read and/or write parameters and
to read out faults.
Description: ––> refer to Chapter 4.3
Protocols for the
”DP slave
POSMO A”
Net data structure
according to PPOs
4 Communications via PROFIBUS–DP
02.99
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