8.6 BACnetChangeOfStateCountType

8.6.1 General

This OPC UA ObjectType represents a set of variables related to the BACnet Change_of_State concept. The type represents metadata related to an object’s Present_Value: when the Present_Value changed, how often it changed, and how often this count is reset.

8.6.2 ObjectType definition

The BACnetChangeOfStateCountType is formally defined in Table 51.

The BACnetChangeOfStateCountType ObjectType is a concrete type and can be used directly.

8.6.3 ObjectType Description

8.6.3.1 Variable Change_Of_State_Time

This OPC UA Property, of type DateTime, represents the date and time at which the most recent change of state occurred. A “change of state” shall be defined as any event that alters the Present_Value property.

8.6.3.2 Variable Change_Of_State_Count

This OPC UA Property, of type UInt32, represents the number of times that the Present_Value property has changed state since the Change_Of_State_Count property was most recently set to a zero value. A “change of state” shall be defined as any event that alters the Present_Value property.

8.6.3.3 Variable Time_Of_State_Count_Reset

This OPC UA Property, of type DateTime, represents the date and time at which the Change_Of_State_Count property was most recently set to a zero value.

8.6.3.4 Method Reset

This Method is used to trigger a reset.

Signature

	BACnetReset (
		);

Method Result Codes