i just want to know if is possible to run the PLC program without conecting fysical I/O, and then monitor the output/input led while the PLC is conected to a PLC using GX-developer.can the input condition be set using force on funktion while the program is running. i did this but when i use the force function but while the PLC was in run mode i did,nt notice any thing on the led. when i use the force function while the PLC was in stop mode, i could get the output let lit , but not the input led.