Experimental Physics and
Industrial Control System

please can you help more briefly regarding my previous query which is:

I am a project trainee working on EPICS. I have made a small project whose GUI is attached below. SpeedSP and SpeedFB variables on soft channel and are analog outputs. Start and stop are binary outputs. Through terminal window when I am writing command
$ camonitor CWS-TXX-WFC:SpeedFB
I am getting the values of SpeedFB in a text file without archiving the data. Now I want the same thing to happen when I click START button and should stop when I press stop button. I have tried using this command in Action button in CSS but it is not working. Please can you give some suggestions.