Design a PLC ladder diagram that controls three motors that have the following sequences: a) press...
Design a PLC ladder diagram that controls three motors that have the following sequences:
a) press the start button to energize the first motor M1 and M1 remains ON.
b) the second motor M2 starts after M1 has started for t-1seconds
c) the third motor M3 starts after M2 has started for t-2seconds
d) press the stop button to stop all three motors at once.
Homework Answers
For gven requirements, ladder logic shown below.
In which t=10sec is assumed.
When input 1 pressed it start motor M1, which starts timer 1, which takes t-1 second i.e. 10-1=9 second to start motor M2. After that M2 start timer 2, which takes t-2 i.e. 8 second to start motor M3. When I6 which is NC pushbutton when pressed it stops all the motor.
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Design a PLC ladder diagram that controls three motors that have
the following sequences:
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