Opc data Access Automation Specification

4.6.3.13

 

EUType  

Description 

(Read-only) Indicate the type of Engineering Units (EU) information (if any) contained in EUInfo. 

Syntax 

 EUType As Integer 

See Also 

OPCITEMATTRIBUTES in the OPC Data Access Custom Interface Specification 

Remarks 

0 - No EU information available (EUInfo will be VT_EMPTY) 

1 - Analog - EUInfo will contain a SAFEARRAY of exactly two doubles (VT_ARRAY | VT_R8) 

corresponding to the LOW and HI EU range. 

2 - Enumerated - EUInfo will contain a SAFEARRAY of strings (VT_ARRAY | VT_BSTR) which 

contains a list of strings (Example: “OPEN”, “CLOSE”, “IN TRANSIT”, etc.) corresponding to 

sequential numeric values (0, 1, 2, etc.) 

Example 

Dim AnOPCItem as OPCItem 

Set OPCItem = GetOPCItem(SomeItemServerHandle) 

VB Syntax Example (getting the property): 

Dim CurrentValue As Integer 

Dim SomeValue As Integer 

CurrentValue = AnOPCItem.EUType