Acyclic Communication (General Parameter Access) Via Bacnet; Write Parameter Request Via Osv0; Read Parameter Content Via Osv1 - Siemens SINAMICS G120X Operating Instructions Manual

Advanced commissioning
6.3 Drive control
6.3.7.6

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
OSV0
OSV1
The OSV are structured as follows:
Function
Code
2F (1 Byte)
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 6-72
2F h
0A h
80 h
01 h
01 h
01 h
10 h
01 h
0002 h
0000 h
If the request was successfully processed, then you can read out the response precisely once
from the present value window of the OSV1:
Table 6-73
2F h
08 h
80 h
01 h
01 h
01 h
10 h
01 h
001F h
288
Description
DS47IN Maximum length 242, of which two bytes header, 240 bytes
user data
DS47OUT
Request length User data
(1 byte) Maximum 240 bytes

Write parameter request via OSV0

Byte Description
1 Function code 2F h (47),
2 Request length 10 bytes (0A h)
3 Request reference = 80 h
4 Request identifier = 1 h
5 DO-Id = 1
6 Number of parameters = 1
7 Attribute
8 Number of elements = 1
9,10 Parameter number = 2
11,12 Subindex = 0

Read parameter content via OSV1

Byte Description
1 Function code 2F h (47)
2 Response length 8 bytes
3 Request reference = 80 h
4 Request identifier = 1 h
5 DO-Id = 1
6 Number of parameters = 1
7 Format
8 Number of elements = 1
9,10 Parameter value 1F h = 31
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
Access type
W
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SINAMICS G120X converter