Experimental Physics and
Industrial Control System

Yes, correct. No decent way to avoid that.

Then, just don't set the HIGH field. Whatever value is being written to the record, the protocol will be executed.

As Dirk was asking: Do you need the response? Can't you just ignore it?

Switch or buttons is a design choice.

Buttons always need a status, else you never know the current device state.

A switch position needs to be readable from the device or persisted (autoSaveRestore), else it might end up in the wrong position after an IOC reboot.

Discussing with colleagues, I found some very strong, almost religious, opinions in the underlying "trigger by state or by pulse" question.

The EPICS database allows to implement one using the other. Flexibility is nice!

Cheers,

~Ralph

ps. Having a record named after you is pretty cool.