BACnet_MSV

The Multi-state Value object type (WinCC OA datapoint type) defines a standardized object whose properties represent the externally visible characteristics of a multi-state value. A "multi-state value" is a control system parameter residing in the memory of the BACnet Device. The actual functions associated with a specific state are a local matter and not specified by the protocol. For example, a particular state may represent the active/inactive condition of several physical inputs and outputs or perhaps the value of an analog input or output.

Datapoint Type Name

BACnet_MSV

(Object/)Datapoint Type Structure

DP_Name.property

Datapoint Element (Property) Data Type Device-depending availability Description
Present_Value unsigned Integer No This property, of type Unsigned, reflects the logical state of the multi-state value. The logical state of the multi-state value shall be one of 'n' states, where 'n' is the number of states defined in the Number_Of_States property. How the Present_Value is used is a local matter. The Present_Value property should always have a value greater than zero. If Present_Value is commandable for a given object instance, then the Priority_Array and Relinquish_Default properties should also be present for that instance. The Present_Value property is writable when Out_Of_Service is TRUE.

Faceplate

Figure 1. Faceplate of "Simple_MSV"

When the hand mode is activated, the present value/state can be changed directly in the faceplate. For more details, see Value Input Panel.

Tabs

For more information on tabs, see Tabs.

Available Symbol Types

Name Usage $ Parameter Symbol
Simple_MSV Logical states - numerical coded, e.g. state definition: 1,2,3,... DP