Logical ladder diagram design
Thread Content
Requirements: A sink, an high-level alarm switch X1, a low-level alarm switch X2, and a water pump Y. The pump should start when a high-level alarm is detected, and it should stop when a low-level alarm is detected. In abnormal situations, when both high-level and low-level alarms occur simultaneously, the pump should still start. Draw the ladder diagram
This post was last edited by zzllyp on 2017-3-22 07:03 --X1-----------|--------------(SET Y) --X1-----X2--| --X2-----(NOT X1)---------(RESET Y)
The logic can be summarized as: Overreporting – trigger command; Underreporting and not overreporting – stop command
The logic can be summarized as: Overreporting – trigger command; Underreporting and not overreporting – stop command
It should be simple logic, right?