I have an application that I may be able to use the PM-5e.
The only question I have, is on the PID control, can I use that to “pulse” on of the 0-10v AO’s?
I have a chiller that runs the compressor at 100% bypass when the system is on, and uses PID control to pulse a LL solenoid valve. Their issue is the output for the LL solenoid is constantly failing.
I wanted to use the 0-10v AO to pulse 10V to a solid state relay to operate the LL solenoid. This will stop the wearing out of the output from rapid switching.
So, if I have a 20second cycle time, and the valve needs to be 100%, it would apply 10V for the 20seconds, or until the PID reduces the percentage.
If I need 20%, it would apply the output for 4 seconds, then wait the rest of the 20seconds out to do it again.
I think I have the programming about right, going to play with it on the T3b I have, but just interested if anyone had any suggestions on the PID section.