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4 Commissioning
4.5 Acyclic data
DX-NET-SWD...
08/14 MN04012009Z-EN
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4.5.4.3 SmartWire-DT write request – Read job
Only individual parameter reading is supported (i.e., array and multiple
parameter reading is not supported). The parameter request's frame length
is set at 10 bytes.
Various objects can be transmitted in the parameter channel – these objects
are identified by what is referred to as a PNU (parameter number) and a
subindex. The write request includes a declaration that specifies that the job
is a read job.
Byte
designation
Description
0
Request Reference
Request identification
Unique identification for a request/response pair for the master.
The master can increment the identification number for each new
request in the application.
They are ten mirrored by variable frequency drive/variable speed
starter.
01
hex
- FF
hex
(i. e. 1
dec
- 255
dec
)
1
Request ID
Request ID
The type of request is specified here.
01
hex
: Read request
2
DO-ID
Drive-Object-ID
00
hex
3
No. of Paramters
Number of Parameters
Only individual parameter processing is supported.
01
hex
.
4
Attribute
Attribute
Defines which object type should be accessed.
10
hex
(16
dez
): Value
5
No. of Elements
Number of elements
Number of vector elements or length of the string being accessed.
PNU 0 up to PNU 999: 00
hex
(only for subindex 0)
PNU 0 to PNU 999 (without 202): 01
hex
6, 7
Parameter number
Parameter number (PNU)
Address of the parameter that should be accessed
0000hex - FFFF
hex
(i. e. 0dec - 65535
dec
)
8, 9
Subindex
Subindex
Address of the parameter's first field element or start of the text
0000
hex
- FFFF
hex
(i. e. 0
dec
- 65535
dec
)
→
In this case, the number of bytes is always 10.
Содержание Power XL SmartWire-DT DX-NET-SWD Series
Страница 4: ...II ...
Страница 10: ...0 About this Manual 0 7 Units of measurement 6 DX NET SWD 08 14 MN04012009Z EN www eaton com ...
Страница 32: ...3 Installation 3 3 Install SmartWire DT connection 28 DX NET SWD 08 14 MN04012009Z EN www eaton com ...
Страница 92: ...4 Commissioning 4 6 SmartWire DT diagnostics 88 DX NET SWD 08 14 MN04012009Z EN www eaton com ...