Electromechanical Drive Control 7

Electromechanical Drive control Operation 7

1. Traffic light Control

In a scenario like this, when the SW1 switch is turned on, the traffic light controller starts to work and the controller stops working when the SW1 is turned off.

SW2 for control mode selector switch:

When the SW2 is turned off, the green, yellow, and red lights turn on, the specific timing is: green light 100 seconds, flash 5 seconds (every second light off once), yellow light 5 seconds, red light on 100 seconds.

When the SW2 is turned on, the intersection becomes night mode, and the red light is always on, and when a pedestrian presses the PB1 button, it turns green after 10 seconds, and the green light continues after 30 seconds.

This little practice is a bit more demanding, but the addition of a step-by-step function can be clearly written to meet the requirements of the ladder diagram. Perhaps the difficulty is a few pulse switch bar. One of the X024 pulse switch is for the first time when the Y002 circuit will be disconnected, only a momentary opening, and then the self-lock when its power, convenient later other control. The green light flashes a reference to the way the lab teacher offered it. The other there is no difficulty (the timer in the figure is simply adjusted a value, and not strictly in accordance with the requirements of 100s,5s, convenient debugging, can be arbitrarily modified).

2. Conveyor belt Control

After opening the SW1 Switch, a new workpiece is started and the workpiece is placed on the conveyor belt, moving to the middle point (detected by the X12 sensor) for 5 seconds, Then run to the far right of the conveyor (X11), pause for 5 seconds, then move left until the workpiece is removed from the conveyor belt (X10), When the workpiece leaves the conveyor belt, the Y10 Supply command is automatically started to supply the next workpiece with the same motion timing.

This small exercise is more difficult than the first to be smaller, perhaps the biggest difficulty is to understand what this exercise means, a few sensors are actually switches, but check the signal when the automatic opening and closing, as long as a reasonable use of the type of switch, such as the use of several pulse switch, not difficult to write a ladder to meet the test instructions. The last restart thought for a while, the last use of the time M4 driven M5 make M4 instantaneous power and power loss, so that Y10 The circuit can be restarted.

Electromechanical Drive Control 7