NORD Drivesystems BU0590 - Manual (Page 25)

4 Communication
BU 0590 GB-0312 Subject to technical amendments 25
4.2 Parameter transfer
4.2.1 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 TU3-PNT are assigned to Slot 2 and the
parameters of the frequency inverter to Slot 3.
The illustration below describes the function of Records
Fig. 11 Function of PROFINET Record
 By means of a "Write Request" the data record is transferred to the IO device (SK TU3-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 TU3-PNT with "Read Request".
 The SK TU3-PNT responds with a "Read Response (-)", if processing is not yet complete.
 After processing of the parameter in the SK TU3-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