Basic PLC Ladder Programming Training Examples for Beginners.
PLC Ladder Practice Problem:
|PLC LADDER Programming Practice Problems 1|
of PLC Inputs Required
of PLC Outputs Required
PLC Ladder Programming:
PLC Ladder Program Description:
- If the bottle on the conveyor belt is upstanding, the input signal from monitoring photocell at both bottle-bottom and bottle-neck will be detected. In this case, X0 = ON, and X1 = ON. The normally open (NO) contact X0 will be activated as well as the normally closed (NC) contact X1. Y0 remains OFF and pneumatic pushing pole will not perform any action.
- If the bottle from the conveyor belt is down, only the input signal from monitoring photocell at the bottle-bottom will be detected. In this case, X0 = ON, X1 = OFF. The state of output YO will be ON because the NO contact X0 activates and the NC contact X1 remains OFF. The pneumatic pushing pole will push the fallen bottle out of the conveyor belt.
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