Siemens SINAMICS G120XA - Acyclic Communication (General Parameter Access) Via Bacnet; Write Parameter Request Via OSV0; Read Parameter Content Via OSV1

6.2.5.6 Acyclic communication (general parameter access) via BACnet
Acyclic communication or general parameter access is realized via BACnet objects DS47IN
and DS47OUT.
Acyclic communication uses the octet string value objects OSV0 and OSV1.
Instance ID Object name Description Access type
OSV0 DS47IN Maximum length 242, of which two bytes header, 240 bytes
user data
W
OSV1 DS47OUT R
The OSV are structured as follows:
Function
Code
Request length User data
2F (1 Byte) (1 byte) Maximum 240 bytes
Write parameter request with OSV0 and read with OSV1
To read parameter r0002 write the following values into the present value window of OSV0
Table 6-39 Write parameter request via OSV0
Byte Description
2F h
0A h
80 h
01 h
01 h
01 h
10 h
01 h
0002 h
0000 h
1
2
3
4
5
6
7
8
9,10
11,12
Function code 2F h (47),
Request length 10 bytes (0A h)
Request reference = 80 h
Request identifier = 1 h
DO-Id = 1
Number of parameters = 1
Attribute
Number of elements = 1
Parameter number = 2
Subindex = 0
If the request was successfully processed, then you can read out the response precisely once
from the present value window of the OSV1:
Table 6-40 Read parameter content via OSV1
Byte Description
2F h
08 h
80 h
01 h
01 h
01 h
10 h
01 h
001F h
1
2
3
4
5
6
7
8
9,10
Function code 2F h (47)
Response length 8 bytes
Request reference = 80 h
Request identifier = 1 h
DO-Id = 1
Number of parameters = 1
Format
Number of elements = 1
Parameter value 1F h = 31
Advanced commissioning
6.2 Drive control
SINAMICS G120XA converter
194 Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB