Siemens SENTRON PROFINET Proxy SPP2000, Manual

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Data traffic
6.3 Acyclic data traffic
PROFINET Proxy SPP2000
48
Equipment Manual, 03/2022, L1V30814715D-01
6.3.4 DS47 data set for flexible read access
You can flexibly read access the data scope of the SENTRON PAC devices you are using by
means of data set DS47.
This data set only applies to the SENTRON PAC devices. The corresponding slot/subslot
address must therefore be used for writing and reading.
Table 6- 7 Structure of data set DS47 – read request
Byte Length
(bits)
Format Data
(examples)
Description
0 16 Unsigned short 0x0001 Register address for value 1 *
2 8 Unsigned char 0x00 Device address 1 **
3 8 Unsigned char 0x02 Register number 1 ***
4 16 Unsigned short 0x0321 Register address for value 2 *
6 8 Unsigned char 0x00 Device address 2 **
7 8 Unsigned char 0x04 Register number 2 ***
...
max. 240
* You can find the register address of the measured variable or the status in the manual for the device
you are using.
** Internal device address.
For SPP2000 = 00.
The lower-level PAC devices are addressed via slot/subslot for the entire data set. For this reason,
always enter the value "0".
*** Enter the number of registers here. One register is the equivalent of 2 bytes; two registers are the
equivalent of 4 bytes, etc.
Table 6- 8 Structure of data set DS47 – read response
Byte Length
(bits)
Format Data
(examples)
Description
0 16 Float 65.6 Value 1, e.g. current L1
3 8 Double 123456789.01 Value 2, e.g. active energy
import
11 ...
...
max. 240
The Read response supplies the requested values in the order of their request.