4 Commissioning
4.4 Acyclic data
48
DX-NET-SWD
06/13 MN04012009Z-EN
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4.4.4 Acyclic parameter channel for DX-NET-SWD3
4.4.4.1 Introduction
The acyclic parameter channel is used in order to configure the parameters
of the DC1 variable frequency drive; it corresponds to PROFIdrive profile.
The following sections describe the parameter channel’s functions.
4.4.4.2 Protocol
The basic task of the SmartWire-DT interface card DX-NET-SWD3 is to
represent the protocol in such a manner that the parameter channel can be
operated completely transparent from the SmartWire-DT. Regardless of
whether data should be read or written, the first request from the coordina-
tor will always be a write request. A parameter request is used to define
whether the job is a read or a write job. After the write request is transmitted
(contains read or write job), a write response without data will be expected.
Then the coordinator poles through the read request of the variable fre-
quency drive, prompted by the application of the higher level PLC. This keeps
acknowledging the read request as negative (Error: State Conflict) until the
read response has been completed and a reply (read order: with data/write
request: without data) can be sent.
Figure 17:
Acyclic parameter channel protocol
Client
SWD Error
OK or
Error
OK or
Error
OK or
Error
SWD Error
SWD Error
Parameter
Request
Parameter
Request
Error or
no Data
Error or
no Data
Parameter
Response
Parameter
Response
(pos./neg.)
Parameter
Processing
DC1
SWD Write Request
SWD Write Response
(no Data or Error)
SWD Read Request
SWD Read Response
(no Data or Error)
SWD Read Request
SWD Read Response
((no) Data or Error)
SWD
DC1
Summary of Contents for PowerXL DX-NET-SWD
Page 4: ...II ...
Page 10: ...0 About this Manual 0 6 Units 6 DX NET SWD 06 13 MN04012009Z EN www eaton com ...
Page 16: ...1 Device series 1 7 Disposal 12 DX NET SWD 06 13 MN04012009Z EN www eaton com ...
Page 26: ...3 Installation 3 4 Dismantling 22 DX NET SWD 06 13 MN04012009Z EN www eaton com ...
Page 64: ...4 Commissioning 4 5 SmartWire DT diagnostics 60 DX NET SWD 06 13 MN04012009Z EN www eaton com ...
Page 68: ...5 Appendix 5 2 SmartWire DT 64 DX NET SWD 06 13 MN04012009Z EN www eaton com ...