plc siemens modbus

The slag silo of a company is about 212 meters long and 20 meters wide, which is subdivided into four slag pools with a length of 24 meters, a width of 24 meters and a depth of 7.5 meters. There are four slag-fishing cranes, and the operation mode of manually operating the crown block in the driving building is adopted at present. The operating room environment is harsh, and the whole operation process requires the operator's high concentration, high labor intensity, easy fatigue and poor vision, which has certain safety risks for personnel and equipment. The four slag-fishing cranes are all relay circuits. When the system is running, the relays and contactors are frequently switched, the current impact is large, the contacts are easy to burn, the brushes are on fire, and the brake shoes are seriously worn, which has potential safety hazards. Moreover, the output conditions of the two motors are different at each stage in the process of slag grabbing and collision avoidance, which leads to the uneven stress and serious wear of the lifting wire rope, high failure rate and long time to deal with the failure. The solution provided by our company is as follows An automatic unmanned crown block system is designed to replace drivers and ground workers who are at risk of safety, and automatically complete the operations of slag storage, slag distribution and loading into cars. Finally, the normal automatic operation mode, semi-automatic mode, remote control operation mode, manual operation mode and maintenance operation mode of the crown block can be realized. Cancel the original cab operation mode, and do not keep the original operating room operation function. When manual or overhaul operation is selected for the crown block, the operator will receive the instructions from the on-site operation and maintenance personnel by observing the video cargo in the central control room, and remotely control the crown block manually. Manual operation or maintenance mode, also has all safety interlock verification functions. Optimize the operation of equipment, build a digital intelligent system, and use "centralized management and intelligent control" as a means to make the operation of equipment safer and simpler, gain favorable comments from customers, and accurately solve the difficulties of enterprise equipment.