Technical Specification
- Compatible with Windows XP/2003 or later (Microsoft Visual C++ 2013 redistributable is required - installed automatically)
- Supports DA Asynchronous I/O 2.0 and Synchronous I/O with COM/DCOM technology
OPC Server sends the OPC Client applications the information on the Value, Quality and Timestamp of an item (tag). These fields are read from the variables. If OPC Server loses communication with their data source (Iotellect Server or Agent), the process values are set to Bad [Configuration Error] quality. If the variable value is empty, the quality is set to Uncertain [Non-Specific]. Concordance table of the Iotellect variables and the OPC data types are represented in the following chart:
Type | OPC Data Type |
Integer | VT_I4. |
Long | VT_I8. |
Float | VT_R4. |
Double | VT_R8. |
String | VT_BSTR. |
Boolean | VT_BOOL. |
Color | VT_I4. |
Date | VT_DATE. |
Data Table | OPC VT_BSTR (by default). |
It also supports arrays of simple data types listed above (VT_ARRAY). Variable of Data Table type can correspond to different OPC data types. By default, the table is converted to a string. But if you use "Value field" in the configuration, then the value of the specified field will be taken from the table.
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