<< Click to Display Table of Contents >> Navigation:  Editing a SpecView Project > Glossary of Key Terms used in SpecView > Writeable Variable

 

An instrument variable that can be changed over communications, for example, a setpoint

NOTE: Some variables can be both Writeable AND Read-Only, for example, output power in a controller can be writeable when the Instrument is in 'Auto' and be Read-Only when the controller is in 'Manual'.

 

 

 

The 'R' column of the Variables List shows which parameters are Read-Only and double-clicking in the box in the 'R' column will set (or unset) this.

 

Alternatively select the parameter and click Properties and use the Attributes tab to set (or unset) whether the parameter is Read-Only.

 

However, parameters on an instrument that cannot be changed are always read-only (for example a measurement), consequently these cannot be unset.

 

Read-Only variables can be changed by the Strategy Controller, but when specifying an Action that sets a Read-Only variable, uncheck the 'Read-Only' attribute in the Variables List and setup the Strategy logic first and then set the variable back to Read-Only.