Hello all,
I have a program wherein there is a sub vi (within an event structure) that controls a stepper drive and makes the drive move certain lengths specified by an user input matrix. In between the drive movements, I want the main vi to execute data logging for a certain amount of time before the drive starts moving again. For that, I need the sub vi to pass a true boolean to the log data local variable in the main vi so that data logging can execute. Currently, I have FGVs within the sub vi that set the FGV data to true in between the drive movements and reset the data to false (to stop data log in the main vi) once certain amount of time has elapsed and the drive needs to start moving again. I have parallelly running FGV within the calling event structure that executes get commands in order to synchronously receive the FGV data. However, I realized that FGVs are non reentrant and they cannot get data while another sets data at the same time. My question is, is there a better way that I can set log data variable on the main vi as true as soon as the sub vi causes the drive to stop for a certain amount of time? Is queuing a better alternative? Please see the attached pictures for your reference.
