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Component explanation:
PLC
component
X0
ET0
Y0
Program:
Program explanation:
1. When X0 is ON, the liquid valve Y0 and precise timer ET0 open at once.
2. Shut down the liquid valve Y0 and precise timer ET0 when the time arrived.
Example 2
The precise timer interruption can produce the following pulse wave. The Y2 ON time is
500ms, the pulse period is 1000ms.
Filling machine
Control explanation
Start button, X0 is ON when the button is pressed
Precise timer
Control the liquid valve, Y0 ON when the valve
opened, Y0 OFF when the valve closed
339
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