4 Commissioning
4.4 Acyclic data
DX-NET-SWD
06/13 MN04012009Z-EN
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4.4.6 Acyclic data via PROFIBUS-DP: DC1 variable frequency drive
4.4.6.1 Introduction
Acyclic communications with a slave via PROFIBUS-DP can basically be
established by a Class 1 master and a Class 2 master simultaneously. This
means that the DC1 variable frequency drive will need to handle acyclic
requests and responses from/to both masters.
4.4.6.2 Addressing
The parameter channel is embedded as a payload data block in the acyclic
PROFIBUS write/read PDUs.
The acyclic data objects of a slave are addressed via slots and indexes on the
PROFIBUS. SWD maps the slot to the SWD module address. The parameter
channel is always addressed with index 47.
4.4.6.3 Protocol
Acyclic services (index-based addressing and payload data) are mapped the
same way on SWD by the PROFIBUS-DP gateway (EU5C-SWD-DP). As a
result, the parameter channel can be used in a fully transparent manner by
SmartWire-DT modules.
The following diagram shows the protocol between the PROFIBUS-DP
master, PROFIBUS-DP gateway, and a DC1 variable frequency drive.
Figure 18:
Acyclic PROFIBUS-DP parameter channel protocol
→
For more information on the subject of the transfer of acyclic
data, consult the MN05013002Z-EN manual, “SmartWire-DT
Gateways“.
Parameter
Request
PROFIBUS-DP
Master
PROFIBUS-DP
Gateway
DC1
Parameter
Request
Error or
no Data
Error or
no Data
Parameter
Response
Parameter
Response
(pos./neg.)
Parameter
Processing
DP Write Request
DP Write Response
(no Data or Error)
DP Read Request
DP Read Response
(no Data or Error)
DP Read Request
DP Read Response
((no) Data or Error)
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)
DP Error
SWD Error
OK or
Error
OK or
Error
OK or
Error
DP Error
SWD Error
DP Error
SWD Error
PROFIBUS-DP
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 ...