User Manual 08/2003 Edition

02.99
Protocols for the
”DP slave
POSMO A”
DP master Class 1
(PLC, e.g. SIMATIC S7)
PNO Guideline, profile for ”variable–speed drives”
Cyclic data transfer: PZD part
Non–cyclic data transfer: PKW part
Fig. 4-1 Protocol for the ”DP slave POSMO A”
Net data structure
according to PPOs
Siemens AG 2003 All rights reserved
SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition
4.1 General information about PROFIBUS DP
PROFIBUS-DP
DP slave
POSMO A
The net data structure for cyclic operation is designated as Parameter
Process Data Object (PPO) in the ”PROFIBUS profile, variable–speed
drives”.
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.
Process data area (PZD, process data)
This area contains the control words, setpoints and status information
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
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
4 Communications via PROFIBUS DP
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4