Industrial Automation from Scratch by Olushola Akande

Industrial Automation from Scratch by Olushola Akande

Author:Olushola Akande
Language: eng
Format: epub, mobi
Publisher: Packt
Published: 2023-01-15T00:00:00+00:00


Figure 8.48 – Using close branch

The preceding is a simple OR logic circuit. Let's discuss the program briefly.

Explanation of the program

Let's say two NO push buttons (PB3 and PB4) are connected to I0.2 and I0.3, respectively, and a pilot lamp, PL2, is connected to Q0.1, as shown in Figure 8.49. Q0.1 will be energized if either PB3 or PB4 or both PB3 and PB4 are pressed, and the pilot lamp (PL2) connected to Q0.1 will be ON. When both buttons are released, there will be no signal flowing to the coil with address Q0.1 and the pilot lamp (PL2) connected to Q0.1 will be OFF:



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