DVWrite Notes

In order to execute a write function, you must specifically choose to execute and confirm the write. A Write function will only execute when you select Execute Write Function from Add-Ins → DeltaV. This makes write functions unlike the read functions in two ways:
- the update interval does not provide automated execution of write functions
- when you create or edit a write function, the function will not execute. The software returns the message, "DVWrite Disabled".
When the active cell in the spreadsheet is empty, selecting Execute Write Function causes all of the DVWrite functions on the active worksheet to execute. DVWrite functions in other worksheets do not execute.
When one or more functions are selected, clicking Execute Write Function executes only those functions. The selected cells must be contiguous.
Only functions on the active worksheet can be executed.
If MS Excel's calculation mode is manual when DVWrites are executed, the DVWrite functions will show "0" or "success" if they succeeded and the error code or corresponding string if they did not.
If MS Excel's calculation mode is automatic when you select Execute Write Function, the software temporarily changes the mode to manual in order to execute the function and send the value. If any function fails to write successfully, the software displays the number of errors and asks you if you want to restore the calculation mode to automatic. You must select No if you want to examine the error values. If you select Yes, the software changes the mode back to automatic which fills the write function cells with a value of "DVWrite disabled". If all write functions succeed, the software changes the node back to automatic which replaces "success" or "0" in the write function cells with "DVWrite disabled".
If you use the Configure Write Function dialogs to specify the parameter property, the parameter reference is in uppercase. If you enter the function manually, you must enter the parameter reference in uppercase.