Bridge crane control PLC ladder design Detection retract mechanism ladder hide programming manual and automatic operation of two run automatically follows Runtime: 1) When the
Click here to download the full size of the above Circuit.
PLC work boot, initialization pulse generated by internal relay M71, so each counter (C460-C463) reset. 2) When the automatic operation switch Sl is closed, X400 normally open contact closure, Y431 coil connected machine retreat plum actuator forward, then the contactor is energized, the crane started to move} Also, all timers, counters start work, the timer T450 produces a pulse every 5s, a hold time of a pulse of the scan period, supplying a scanning signal to the counter. 3) When the 0160 count to 1-6, C460 normally closed contacts open, so Y431 coil power, retract mechanism stops. 4) a few 45s, C461 counter to 15,0461 normally open contact closure, Y432 coil connected, cranes began to recede; to work after 30s, C462 counter to 21, C462 normally open contacts open, Y432 coil oFF, the back stop. 5) After a break 45s, C463 counts to 30, C463 normally open contact closure, so that all the counter is reset, and counting resumes fork into the second cycle. (4) Conclusion inverted by using PLC to control the operation of the bridge overweight machine to detect in the field can be efficiently completed, can fully reflect the PLC has the function, high reliability, programming is simple, easy to use, small size and other advantages. Using PLC can also solve a lot of trouble under the traditional control manipulated, including the opening and closing of the motor and the motor when lifting the grab just closed loading lift pheasant in the same step and other issues. At the same time, it can also reduce labor intensity, improve work performance crane.
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: