2 profibus dp ppo types – NORD Drivesystems BU0220 User Manual
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BU 0220 GB-0912
Subject to technical amendments
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7.2 PROFIBUS DP PPO types
For cyclic data traffic, the Parameter- Process data Object (PPO) with which the process data (PZD) and
parameters (PKW) are transferred from the DP master to the frequency inverter is defined. The frequency inverter
can process PPO types 1, 2, 3 or 4.
Type
Task
PPO1
extended parameter data telegram with 32 bit parameter values and process data
PPO2
Telegram with extended process data (main and two auxiliary setpoint values) and 32 bit parameter
value
PPO3
Process data telegram with main setpoint value without parameter data
PPO4
extended process data telegram with main and auxiliary setpoint values without parameter data
PPO3 and PPO4 are purely process data objects for applications which do not require parameter processing.
Note:
A PLC can normally only consistently transfer double words by means of I/O memory access. For
longer data formats (PKW channel always / PZD data with PPO2 or PPO4) system functions (e.g.
SFC 14, consistent data reading / SFC15, consistent data writing) must be used.
Structure of PPO types
PKW
PZD
PKE
IND
PWE
PWE
PZD1
PZD2
PZD3
PZD4
STW
SW1
SW2
SW3
ZSW
IW1
IW2
IW3
1. word
2. word
3. word
4. word
5. word
6. word
7. word
8. word
PPO 1
PPO 2
1. word
2. word
3. word
4. word
PPO3
PPO4