In this series, we have seen that a Function Block has many practical real-world automation applications.
Today, I will complete the example of the small batch process with a large mixing tank with an agitator, four-ingredient addition lines, and a bottom valve.
In the previous video, I completed the PLC programming of our small batch process.
I added the necessary control logic to the “Sequencer” Function Block and also “MAIN OB”, so that the sequencer will take the appropriate actions for initialization at the start of the sequence, manage its status indicators during the execution each step in the sequence, and return to the initial idle state at the end of the sequence so that it is ready for the next batch.
In this video, I will compile and download the program to the PLC and simulate the operation of the batch process.
We will be able to see how the sequencer runs in a simulated environment and controls the outputs to each valve and the agitator as it transitions from step to step.