antontobias
Member
- Join Date
- Oct 2004
- Posts
- 1
hello,
i am a entry level student studying plcs. i was wondering if anyone could help me with a problem.
i need to control 2 pumps. using a pressure switch as a set point for low tank pressure only one pump can be on at a time to raise pressure, they must operate in an alternating sequence. and if one fails the other must turn on. both pumps cannot run simultaneously. if it can be done without a timer that would be better.
i searched around and found flip flop solutions but didnt know how to tailor it to my problem.
can someone point me in the right direction to a ladder diagram
thanks alot.
i am a entry level student studying plcs. i was wondering if anyone could help me with a problem.
i need to control 2 pumps. using a pressure switch as a set point for low tank pressure only one pump can be on at a time to raise pressure, they must operate in an alternating sequence. and if one fails the other must turn on. both pumps cannot run simultaneously. if it can be done without a timer that would be better.
i searched around and found flip flop solutions but didnt know how to tailor it to my problem.
can someone point me in the right direction to a ladder diagram
thanks alot.