Prepare a PLC ladder program for the system of given Problem and given Figure with the following added requirements:
(1) The system should cycle 100 times and then quit, and
(2) during each cycle, there should be a 1.5-minute delay after filling before the empty phase starts. The PLC tick time is 10 ms.
Problem
When turned ON, the tank system of Figure 44 alternately fills to level L and then empties to level E. The level switches are activated on a rising level. Both NO and NC connections are available for the level switches and the ON/OFF push buttons. Prepare a physical ladder diagram for this system.
