PLC controls the lifting of the cylinder. Each magnetic switch on the cylinder has two wires, which are divided into positive electrode and negative electrode. Where are the connections?

If the input is DC24V. Generally speaking, COM is the positive pole of power supply. Xn is the input point of the signal, just connect the negative electrode. Because PLC is active low.

Usually, the magnetic switch of the cylinder has two wires, one is connected to the input terminal and the other is connected to the male terminal. It depends on the specific PLC model and male terminal wiring to know whether the male terminal is just negative.

Up-and-down adjustment: When the cylinder is retracted, in the energized state, put the electromagnetic switch at the extended end of the cylinder until the induction lamp lights up. Then, when the cylinder is extended, adjust another magnetic switch near the extended end of the cylinder until the light comes on. Just write a ladder diagram according to the wiring, only one or two lines.

Extended data:

The internal working mode of PLC generally adopts the cycle scanning working mode, and some large and medium-sized PLCs have joined the interrupt working mode. When the user finishes debugging the user program, the program is written into the PLC memory through the programmer;

At the same time, the field input signal and the controlled actuator are connected to the input end of the input module and the output end of the output module, and then the PLC working mode is selected as the running working mode, and the later work is completed by PLC according to the user program. The figure on the right shows the block diagram of PLC execution process. In the working process of PLC, it mainly deals with six modules.

Baidu encyclopedia -PLC control