Using the CMC Multicon with its Autotuning in practice
The CMC Multicon device comes pre-installed with 8 x PID control functions available, when used with the appropriate input and output cards these PID controllers can be used to control a complete process from start to finish.
One of the examples of the practical application of a Multicon Controller with auto-tuning is the process of controlling the elements within an annealing furnace. The temperature set point is shown in the form of an appropriate time profile and can be input by the operator from the screen directly using an 'edit button' function (see youtube example here). The process usually consists of three stages: heating to the higher temperature, annealing; which means maintaining at a constant temperature and cooling when complete to a reasonable temperature for the operator to handle. The regulation is based on the PID controller whose parameters are selected automatically during autotuning process.
The following model is often selected for this application: CMC-141-PS42/E/UN3/S8/E-0B1
The UN3 module consists of 3 isolated universal inputs (U/I/RTD/TC/mV). In this case, the temperature input is used. It reads from the temperature sensor measured inside the furnace.
The S8 module consists of 8 SSR outputs, one of which is used to control heating in the furnace. Another SSR can be used to set the cooling fans at the end of the operation, depending on the requirements of the process.
The USB module allows you to download data saved during the recording of the entire process.
The user can create up to 8 time profiles, i.e 8 "heating programs" customized to the requirements of individual elements being treated or annealed. Before starting the process, the appropriate profile is selected.
The USB port, for the convenience of use, is placed on the front of the device.
For more information about the CMC Multicon, please visit the page.