approach to controlling heating elements
Posted: Wed Sep 23, 2020 6:58 am
Looking for suggestions on controlling heatings elements.
I need to control the HLT and Boil kettle elements, but they shouldn't run at the same time to prevent tripping the circuit breaker. I was trying to use PID to control the HLT; set the boil element on and switch to duty cycle to maintain boil; using ladder logic to turn one off if the processes turn both on. That wasn't working well with the ladder logic I was using.
What approach should I use to keep the elements from running at the same time?
I need to control the HLT and Boil kettle elements, but they shouldn't run at the same time to prevent tripping the circuit breaker. I was trying to use PID to control the HLT; set the boil element on and switch to duty cycle to maintain boil; using ladder logic to turn one off if the processes turn both on. That wasn't working well with the ladder logic I was using.
What approach should I use to keep the elements from running at the same time?