Hi, my friends. I am analyzing a program made in RSLogix 5000, specially de PID loops, I have some questions: This is the first: In AUTO mode a PID can control an Output %, using only the variable, .SO ? or this kind of variable is only active in Manual mode? and first we have to set the BIT, .SWM or .MO In the program I mentioned, there is a PID that its CV is not used in nowhere in the program, but his .SO variable (Named as AIC 5600.SO) is used like Input in other 2 SCP instructions, and then its outputs are connected to physical analogue outputs. Is that possible? What kind of control is this? Please give some light about it.Thanks. Zeno Martorana.Italy.