Logic Diagram High Level. When high level of overhead tank reaches then the water pump should stop. Ladder logic plc programming is the most popular and easy to learn methods of automating our process using the plcs.
Pressure switch as level sensor in order to set a low level and high level inside the tank. The use case view models the end users perspective of a system and employs the following diagrams. The structured text is a high level language developed for industrial control and is usually in c or pascal language.
V oh minimum output voltage level a ttl device will provide for a high signal.
The noise margin is about 04v. Plc is used in this project as an automation tool to reduce manual operation and get better accuracy. In a perfect world all logic circuit signals would exist at these extreme voltage limits and never deviate from them ie less than. All types of logic gate except not accept two binary digits as input and produce one binary digit as output.