The I-task could be used as follows:
ICL> LOADW PHOTOM
Loading PHOTOM into PHOTOM
ICL> SEND PHOTOM SET FILTER_DEMAND V
ICL> SEND PHOTOM GET FILTER_DEMAND
V
ICL> SEND PHOTOM OBEY FILTER
ICL>
The last command starts the FILTER action but does not wait for it to complete. ICL can accept and execute other commands while the filter wheel is moving to its position. When the action finally completes the I-task returns a completion message to ICL which will be output on the terminal.
ICL>
"obey" FILTER - action complete
ICL The Interactive Command Language for ADAM