I have a setup composed by a pc in which I installed monkeylogic and connected a daq which can send an analog signal to a camera controlled by an external software
During monkeylogic intertrial, is it possible to keep sending an analog output (i.e. by adding a line to the script (set_iti(durantion) and toggleobject() )) or during intertrial monkey logic fails to send any commands?

Thanks for the help!

set_iti() just specifies the duration of ITI. It does not initiate ITI.
https://monkeylogic.nimh.nih.gov/docs_RuntimeFunctions.html#set_iti

ITI of NIMH ML starts when your timing script ends, but your definition of ITI does not have to be the same as NIMH ML's. For example, you can add idle(1000) at the beginning and end of the timing script and regard those periods as a part of ITI. I would stamp eventmarkers there though, to mark the trial start and end clearly, like idle(1000,[],9).