The distribution scale is composed of a weighing machine and a control system, and the weighing machine is mainly composed of a support frame, a lifting cylinder, an electronic scale and a weighing table bracket. The control system is mainly composed of industrial computer, PLC, load cell and intermediate relay, etc. The software system uses Microsoft VB6.0 and Access2000,SIEMENS STEP7V5.4. Multiple electronic scales can be set up through the network hub EN-THERNET 485 communication network expansion, on the computer can not only achieve the weighing value record, save, query and archive management functions, but also can control the industrial process flow.
020-34563445Automatic feeding scale is composed of computer, weighing module cabinet and peripheral equipment (front proportioning scale, post automatic proportioning scale, material level machine). The automatic Batching system consists of computer as the human-machine interface of the whole system. One of them is the main station to complete all system parameter setting, process monitoring and data recording; The other one is the slave station, relying on the main station, responsible for the data setting and process monitoring of the post ingredients. The master station communicates directly with the Siemens S7-300 PLC system, the front automatic control and the rear batching. The sealed junction box is used on site, which is dustproof and moisture-proof to ensure reliable signal transmission. The weighing instrument uses a special industrial process controller, and the pre-mixing solution mainly depends on the weighing module, weighing module and PLC control. The weight information of the tank or hopper is transmitted to the weighing instrument through a weighing module installed under it. Based on this information and pre-set dosing procedures, analyze and control accordingly. The whole program can be controlled independently by weighing module and PLC controller.
The computer software can simplify the operation interface of the whole system, and make it easier for the controller to master and use. Through RS-485 bus to realize communication with the central control room, not only can be independent control, but also can realize PLC online control. For the batching scale or a single automatic weighing equipment in the automatic production line, PLC communicates directly with RS485 port or uses analog input and output modules to configure the batching, while setting the weighing controller PLC to perform production process control, VB program can be compiled into an independent execution EXE file or SETUP installation file, easy to use and transplant.
