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8
Prozess data transmission PZD
ID 441687.04
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Operation manual
28
8
Prozess data transmission PZD
8.1
Parameter process data object (PPO)
The 5
th
generation of STÖBER inverters offer various telegram types in the GSD
file for cyclic data transmission. The master selects one of the possibilities to
configure the inverter and then start the bus. These possibilities are called
parameter process data object (PPO types) and always contain the process data
channel (PZD) and sometimes also a parameter channel (PKW0). The Devices
of the 5
th
generation of STÖBER inverters provide five different PPO types to
choose from for the establishment of this user data structure.
To be able to use the functionality of process data transmission, the applicable
blocks must be activated by the PC software POSITool. This is done by selecting
a suitable application in user-prompted commissioning and then downloading it to
the inverter. PPO types 3 and 4 do not need a separate memory area for the
PKW1 service of the DP-V1 protocol.
Fig. 8-1 PPO-Typen
PPO1
PPO2
PPO3
PPO4
PPO5
PKE
Bytes
IND
PWE
PKW
PZD
PZD1, 2, 3, 4, 5 6
0 1 …
… 19
PKW : Parameter ID value
PZD : Process data
PKE : Parameter ID
IND : Subindex in byte 2, Byte 3 is reserved
PWE : Parameter value