CitectVBA can use your CitectSCADA project variable tag and alarm tag variables in the same way as could Cicode (except for syntax differences). Both programming languages refer to a project's variable tags by using the name of the tags as defined in the project.
Note: Project variable tags are defined (in CitectSCADA) by using the Variable Tags form in the Citect Project Editor. For details, see Adding a Variable Tag.
For instance, in the following example, two variable tags in your CitectSCADA project may be named B1_PUMP_101_SP and B1_PUMP_101_PV respectively, representing the Set Point and Process Variable values of Pump 101. These variable tag names can be used within a CitectVBA statement (just as you would use any other variable in CitectVBA). Both values can be read-from and written-to directly using CitectVBA:
' set pump speed to 500 rpm
B1_PUMP_101_SP = 500
' calculate pump speed error
varPumpSpeedError = B1_PUMP_101_PV - B1_PUMP_101_SP
You should note that CitectVBA does not recognize CitectSCADA variable tags that are named with an initial digit (0-9).
To access such tags using CitectVBA, you must precede the tag name with a case-insensitive string containing the letters 'V', 'B,' and the underscore character (VB_) as in the following example:
Tag Name: "123Pump"
CitectVBA reference "VB_123Pump"
For details about accessing ActiveX objects using
CitectVBA, see Accessing ActiveX
Objects with CitectVBA. For details of using tags that have a
number as their first digit in your CitectSCADA project, consider using the
Using CitectVBA in CitectSCADA Command or Expression fields>Calling CitectVBA from Cicode
Calling CitectVBA from Cicode