#Misc Attributes (MiscAttributes.md)
[DataType]
The following table shows how the IEC 61131-3 data types are mapped to the .NET-Framework and to C#, respectively. Variables of data types that are marked in the column "DataType Attribute" with a '+' must have the optional attribute "DataType" for an unambiguous assignment.
| IEC 61131-3 | .NET Framework | C# | DataType Attribute |
|---|---|---|---|
| BOOL | System.Boolean | bool | - |
| SINT | System.SByte | sbyte | - |
| INT | System.Int16 | short | - |
| DINT | System.Int32 | int | - |
| LINT | System.Int64 | long | - |
| USINT | System.Byte | byte | - |
| UINT | System.UInt16 | ushort | - |
| UDINT | System.UInt32 | uint | - |
| ULINT | System.UInt64 | ulong | - |
| REAL | System.Single | float | - |
| LREAL | System.Double | double | - |
| TIME | System.UInt32 | uint | + |
| LTIME | System.Int64 | long | + |
| LDATE | System.Int64 | long | + |
| LTOD | System.Int64 | long | + |
| LDT | System.Int64 | long | + |
| BYTE | System.Byte | byte | + |
| WORD | System.UInt16 | ushort | + |
| DWORD | System.UInt32 | uint | + |
| LWORD | System.UInt64 | ulong | + |
| STRING | System.Iec61131Lib.IecStringEx | - | |
| ANY | System.Iec61131Lib.Any | + | |
| ANY_MAGNITUDE | System.Iec61131Lib.Any | + | |
| ANY_NUM | System.Iec61131Lib.Any | + | |
| ANY_INT | System.Iec61131Lib.Any | + | |
| ANY_SIGNED | System.Iec61131Lib.Any | + | |
| ANY_UNSIGNED | System.Iec61131Lib.Any | + | |
| ANY_REAL | System.Iec61131Lib.Any | + | |
| ANY_BIT | System.Iec61131Lib.Any | + | |
| ANY_ELEMENTARY | System.Iec61131Lib.Any | + |
[OPC]
PLCnext has an integrated OPC server. The [OPC] attribute adds the related field as a new entry in the server tree, under the root entry ARP.Eclr.