Siemens SINAMICS G120 - Page 131

Configuring the fieldbus
7.3 PROFIdrive profile for PROFIBUS and PROFINET
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
131
Reading parameter values
Table 7- 5 Request to read parameters
Data block
Byte n
Bytes n + 1
n
Header
Reference 01 hex ... FF hex
01 hex: Read request
0
01 hex
Number of parameters (m) 01 hex ... 27 hex
2
Address, parameter 1
Attribute
10 hex:
Parameter value
20 hex: Parameter description
Number of indexes
00 hex ... EA hex
(for parameters without index: 00 hex)
4
Parameter number 0001 hex ... FFFF hex
6
Number of the 1st index
0000 hex ... FFFF hex
(for parameters without index: 0000 hex)
8
…
…
Address, parameter 2
…
…
…
…
…
Address, parameter m
…
…
Table 7- 6 Inverter response to a read request
Data block
Byte n
Bytes n + 1
n
Header
Reference
(identical to a read request)
01 hex
: Inverter has executed the read
request.
81 hex
: Inverter was not able to completely
execute the read request.
0
01 hex
Number of parameters (m)
(identical to the read request)
2
Values, parameter 1
Format
02 hex: Integer8
03 hex: Integer16
04 hex: Integer32
05 hex: Unsigned8
06 hex: Unsigned16
07 hex: Unsigned32
08 hex: FloatingPoint
10 hex: OctetString
13 hex: TimeDifference
41 hex: Byte
42 hex: Word
43 hex: Double word
44 hex: Error
Number of index values
or - for a negative
response -
number of error values
4
Value of the 1st index
or - for a negative response -
error value 1
You can find the error values in a table at the end of this section.
6
…
…
Values, parameter 2
…
…
…
Values, parameter m
…