Pollard
Member
Good morning all, I have a new project that involves three, potentially, simultaneous batch filling operations. I have up to six chemicals to dose into three separate tanks. Each tank is filled with a preset amount of water and varying ratios of the chemicals are dosed into the water flow via a mixing block prior to the holding tank. Baseed on information from the customer, this operation will take place up to seven times an hour (I have approximately six minutes for each batch). My setpoint for the PI controllers will be generated from the water flow on each line and the feedback will come from individual flowmeters in the chemical lines. The output from the controllers are peripheral words directly operating the six dosing pumps via an analogue signal. My question is this; does anyone have experience of running multiple PI controllers simultaneously and, if so, what are the potential pitfalls?