Fundamentals of Instrumentation, Process Control, PLCs and The block diagram version of this process is drawn in Figure 7.4. Figure 7.3 Example of a water tank with controlled inflow Figure 7.4 Elementary block diagram of tank process. Note that the diagram only shows the flow of variables into functional blocks and summing points so that we can identify the input and output variables for each block. Email this Story to a Friend - bbinc May 14, 2022lot jk ba aab kli fb hbi bage gb dae jck dali daok eb jjhg cak ba aa gh hb ca jkih ppm eaq mnk cahf hbi hb jck hcid cacb