Irrigation Canal Downstream Water level PLC Control
Two downstream level sensors provide redundant measurements at two points downstream locations. These sensors must be validated as they should provide similar readings consistent with previous measurements. We will assume two validated sensors input values for this project. Upstream flooding limit switch (not included in this abbreviated discussion implementation) is used to provide the regulator an indication of possible flooding and thus command the system to raise both gates gradually using the same selection criteria until the flooding condition is removed or downstream level is close to the upstream level.