I know there is a lot that the PACA controller can do, besides the logic engine. I wonder if there is any training material briefly demonstrating all it can do, using the RS232 ports..for example. Also I wonder if there is any way to tell if its logic engine are running or not from indicators? I have experience that, after using it as PCI, the unit is not running even I pull the usb cable. Not only the logic but schedules ..etc. I have to power reset the unit for it to run again. So, it will be better if I can tell from indicators because it is hard to notice functions like schedules if it is running or not.