Hi all,
I'm currently doing this 3 element control for boiler water level. The 3 elements were water level, steam flow and feed water flow. I have the idea of using PID to control the control valve at the end point but cant really figure out how to cascade or loop the PID(s) to get the result. There is only 1 set point for use input which to maintain the boiler water level at certain stage but it has to be controlled by all these 3 parameters.
Yokogawa is having this 3 element controller YS-1700 which can direct input all these 3 parameters and come out with an anologue output. But no idea how they program it.
Appreciate anyone who can help.
Thanks and regards,
Kenshin
I'm currently doing this 3 element control for boiler water level. The 3 elements were water level, steam flow and feed water flow. I have the idea of using PID to control the control valve at the end point but cant really figure out how to cascade or loop the PID(s) to get the result. There is only 1 set point for use input which to maintain the boiler water level at certain stage but it has to be controlled by all these 3 parameters.
Yokogawa is having this 3 element controller YS-1700 which can direct input all these 3 parameters and come out with an anologue output. But no idea how they program it.
Appreciate anyone who can help.
Thanks and regards,
Kenshin