NORD Drivesystems BU0290 - Manual (Page 37)

5 PROFINET - Data transfer
BU 0290 GB-4312 Subject to technical amendments 37
5.2 Parameter transfer
5.2.1 Function of PROFINET Records
The transfer of parameter data (Records) is performed acyclically. All parameters of the FI and the bus module
can be accessed. For this the parameters of the SK TU4-PNT are assigned to Slot 2 and the parameters of the
frequency inverters 1 ... 4 are assigned to Slot 3 ... 6.
The illustration below describes the function of Records
Fig. 10 Function of PROFINET Record

By means of a "Write Request" the data record is transferred to the IO device (SK TU4-PNT) as a
parameter order.

With "Write Response" the IO controller receives confirmation of the receipt of the message.

The IO controller requests a response from the SK TU4-PNT with "Read Request".

The SK TU4-PNT responds with a "Read Response (-)", if processing is not yet complete.

After processing of the parameter in the SK TU4-PNT the parameter order is concluded with the transfer
of the parameter response to the IO controller by means of "Read Response (+)".
IO controller
Parameter
order
PROFINET Record
IO Device
Parameter
order
Parameter
response
Write Request
Slot 3
Read Request
Slot 3
Read Response (-)
Slot 3
Read Request
Slot 3
Write Response
Slot 3
Read Response (+)
Slot 3
Parameter
response