hi ravens fan,
I know this thread is old but iam in urgent need of help.kindly help me out.
I want to develop the exact thing what u have said here. how to use PWM so that i can maintain the temperature in a particular setpoint.i am using crio-9004 controller.i have AI module(NI9201) and DIO module(NI 9401)in hand.i want to give DIO 0 as the output to the relay.
another one doubt i need to get clarified is ..
.--> is it possible to develop a PID controller without analog output module.the PID output is the control variable that should be delivered to the system right?according to my knowledge by making use of DO only a ON/OFF controller can be developed.
Here are some examples you may want to look at about making a PID controller and PWM. I do believe you can do this without AO 🙂
I have also attached a project that may help as well. It was an old POC. I hope this gets you going 🙂