WEG DeviceNet CFW500 User Manual - page 25
Positive Response
(slave -> master)
Header
Data Unit (DU)
End
Function
5Fh
Slot
0
Index
47
Size
0
Negative Response
(slave -> master)
Header
Data Unit (DU)
End
Function
DFh
Error Decode
128
Error Code 1
xx
Error Code 2
xx
Reading Telegram (DS_Read):
Request
(master -> slave)
Header
Data Unit (DU)
End
Function
5Eh
Slot
0
Index
47
Size
240
Positive Response
(slave -> master)
Header
Data Unit (DU)
End
Function
5Eh
Slot
0
Index
47
Size
n
Request
Data
(n bytes)
Negative Response
(slave -> master)
Header
Data Unit (DU)
End
Function
DEh
Error Decode
128
Error Code 1
xx
Error Code 2
xx
Each telegram field can assume the following values:
Function
5Fh – Writing request, positive response for writing
5Eh – Reading request, positive response for reading
DFh – Negative response for writing
DEh – Negative response for reading
Slot
0 (It is the standard slot for accessing the drive parameters, according to PROFIdrive)
Index
47 (It is the standard index for accessing the drive parameters, according to PROFIdrive)
Size
Number of bytes for reading and writing.
Writing request: ‘n’ bytes, according to the number of bytes in the request telegram.
Positive response for writing: 0 bytes
Reading request: 240 bytes (It requests the maximum number of reading bytes, because the size of the
slave response is variable).
Positive response for reading: ‘n’ bytes, according to the number of bytes in the response telegram.
Error Decode
128
Error Code 1
Error code, according to the problem found in the request:
B0h: access error – invalid slot
B2h: access error – invalid index
B5h: access error – modification not allowed for the parameter
B6h: access error – modification in read-only parameter
B7h: access error – incorrect values for parameter access
B8h: access error – invalid parameter number
C3h: Resource error – Response not available for the reading request
Error Code 2
0
Request Data
Variable size field of the writing request (DS_Write), which contains the data for accessing the drive
parameters.
Response Data
Variable size field of the reading response (DS_Read), which contains the result of the access to the drive
parameters.
5.2.4 Data Structure for Parameter Access – PROFIdrive
The CFW500 frequency inverter makes available the access to the inverter entire parameter list through the
acyclic data, according to the PROFIdrive specification. According to the specification, the access to the global
parameters is achieved through the following addressing:
Slot 0
Index 47
Through this slot and index, one must use the structure to access the parameters defined in the PROFIdrive
specification, in order to perform readings and modifications of the CFW500 frequency inverter parameters. This
access uses the following mechanism:
1. Either the reading or the modification of parameters must begin with a writing DP-V1 telegram (DS_Write) at
the slot 0 index 47, with the request of the parameter to the drive.
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