NORD Drivesystems BU0290 - Manual (Page 29)

5 PROFINET - Data transfer
BU 0290 GB-4312 Subject to technical amendments 29
5 Communication
5.1 Process data
Control words and setpoints are transferred from the bus master / controller to the SK TU4- …bus module as
process data and in return, the status word and actual values are sent to the bus master / controller from the
FI. Transfer is carried out cyclically. The bus master / controller can access these process values directly, as
they are stored in the IO area.
The length and structure of the process data is specified via the PPO types during the planning of the
PROFINET network.
The allocation of the values transferred in the setpoint/actual value area of the FI is made via the parameters
P543 to P548 or P543 [-
01]…[-05] and P546 [-01] …[-05]..
5.1.1 Process data structure
The structure of the process data is defined by the PPO type.
5.1.1.1 Pure process data communication
Direction of
transmission
Transmitted data
( 4 Byte )
1st word 2nd word
... to SK TU4 Control word Setpoint 1
... from the SK TU4 Status word Actual
value 1
Table 11: PPO 3
Direction of
transmission
Transmitted data
( 8 Byte )
1st word 2nd word 3rd word 4th word
... to SK TU4 Control word Setpoint
1 Setpoint
2 Setpoint
3
... from the SK TU4 Status word Actual
value 1 Actual
value 2 Actual
value 3
Table 12: PPO 4
Direction of
transmission
Transmitted data
( 12 Byte )
1st word 2nd word 3rd word 4th word 5th word 6th word
... to SK TU4 Control word Setpoint
1 Setpoint
2 Setpoint
3 Setpoint
4 Setpoint
5
... from the SK TU4 Status word Actual
value 1 Actual
value 2 Actual
value 3 Actual
value 4 Actual
value 5
Table 13: PPO 6