Boolean parameters
Boolean parameters represent two states. The "on" state (logically true) is represented by ON or a numeric value 1. The "off" state (logically untrue) is represented by OFF or the numeric value 0. The numeric values are provided as the response for a query.
Example
Setting command: HCOPy:DEV:COL ON
Query: HCOPy:DEV:COL?
Response: 1