QuickOPC User's Guide and Reference
DALimitChoice Enumeration



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace : DALimitChoice Enumeration
The Limit bit field of OPC quality.
Syntax
'Declaration
 
<CLSCompliantAttribute(True)>
<ComVisibleAttribute(True)>
<DisplayName2Attribute("OPC-DA Limit Choice")>
<GuidAttribute("15B0FF4A-D144-4F57-96E8-E43384FB81AE")>
Public Enum DALimitChoice 
   Inherits System.Enum
   Implements System.IComparable, System.IConvertible, System.IFormattable 
'Usage
 
Dim instance As DALimitChoice
[CLSCompliant(true)]
[ComVisible(true)]
[DisplayName2("OPC-DA Limit Choice")]
[Guid("15B0FF4A-D144-4F57-96E8-E43384FB81AE")]
public enum DALimitChoice : System.Enum, System.IComparable, System.IConvertible, System.IFormattable  
[CLSCompliant(true)]
[ComVisible(true)]
[DisplayName2("OPC-DA Limit Choice")]
[Guid("15B0FF4A-D144-4F57-96E8-E43384FB81AE")]
public enum class DALimitChoice : public System.Enum, System.IComparable, System.IConvertible, System.IFormattable  
Members
MemberValueDescription
LimitConst3Constant. The value is a constant and cannot move.
LimitHigh2High Limited. The value has ‘pegged’ at some high limit.
LimitLow1Low Limited. The value has ‘pegged’ at some lower limit.
LimitOk0Not Limited. The value is free to move up or down.
Remarks

The Limit Field is valid regardless of the QualityChoice and Substatus. In some cases such as Sensor Failure it can provide useful diagnostic information.

Server which do not support Limit return 0 (LimitOk).

Inheritance Hierarchy

System.Object
   System.ValueType
      System.Enum
         OpcLabs.EasyOpc.DataAccess.DALimitChoice

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also