User Manual

OPC Object Specifications
Siemens
Building Technologies
ID Object Model Description
STT20/STT11-0270
STT20/STT11 Event commands
OPC Item Acked Transitions OPC Item Operation Expected Result State \ \ \ \
7 - Normal 0 - None Normal
7 - Normal 4 - Reset Reset
6 - Ack to offnormal 0 - None Acknowledge
6 - Ack to offnormal 1 - Silence Acknowledge and Silence
6 - Ack to offnormal 7 - Unsilence Acknowledge and Unsilence
5 - Ack to fault 0 - None Acknowledge
This is not an Object Model but provides the read-only information about the event states. The event
related to the point can require the acknowledge, silence/unsilence, and reset commands.
States
Commands on OPC Item Mode
OPC DA Specifications_V3.0_STT20-STT11.xlsx Page 29 of 30