Dosage systems utilize dosage control in various areas such as in-line cleaning and sterilizing, and process manufacturing. It is also possible to monitor the system, track parameters, signal alarms, record data, and chain control. Can change the dosage ratio and formula, can be adjusted through the programming, quickly change the device of the material drop. From the industrial control machine, the formula is sent to the PLC, the weigher communicates with the PLC in real time through the field bus, and the PLC controls the automatic weighing of the whole formula, and by monitoring the whole automatic weighing process in real time, it realizes the intelligentization of the automatic weighing.
020-34563445The weighing Feeder is based on programmable intelligent module, industrial control computer and RS485 field bus to realize signal acquisition, processing, control and output, which constitutes a kind of hopper scale Weighing system with high cost-effectiveness; the communication between on-site monitoring computer and management computer is realized by using local area network; and the software of the weighing system adopts the modularization method to be compiled using VC++. The actual operation shows that the system is reliable, easy to maintain and use, friendly man-machine interface, and has good control effect. The Dosage system can be improved and used for loss-in-weight scale, speed control scale, spiral scale and other microcomputer dosage, which has a greater value of popularization and application in microcomputer dosage.
The A/D conversion adopts IOM4017 module and the D/O conversion adopts IOM4050 module, in which the electromagnetic vibrating feeder is controlled by a piece of IOM4050 and the door-opening motor is controlled by a piece of IOM4050. IOM4017 and IOM4050 modules are self-developed A/D and D/O conversion modules, which have the features of strong anti-jamming ability, high reliability and long transmission distance. IOM4017 and IOM4050 modules are self-developed A/D and D/O conversion modules with strong anti-interference ability, high reliability and long transmission distance. It only needs two wires to communicate with the control host through RS485 network. The use of multiple modules can easily form a RS485 distributed control system network. Each network can be connected to a maximum of 255 modules, the network through the RS232/RS485 conversion can be connected to the control computer.
RS485 is a half-duplex transmission communication bus, there are only two signal lines, one for the signal line positive, one for the signal line negative, respectively, labeled as A and B, or DA-TA +, DATA-. RS485 adopts differential transmission, the maximum transmission distance of 1.2Km meters. When the modules are connected, the positive signal of the bus is connected to the DATA+ of each module, and the negative signal of the bus is connected to the DATA- of the module.
VisualC++ is a step-by-step programming tool created for developing Windows applications. Its high performance and highly integrated development environment allows users to easily create and debug Windows applications. Compared with VisualBasic, VisualC++ is characterized by high efficiency and reliability, which makes it one of the preferred software for writing microcomputer monitoring systems. This weighing system is written in VisualC++. The microcomputer dosage system adopts a single document interface and uses a static link library to form an executable file.
The "real time" requirement of the monitoring is realized by the timer method with a timing time of 0.5 seconds. Each cycle completes the data communication, input and output detection, control algorithms, output refresh, alarm output, screen display operations. Data communication is realized by multi-threading. Command and data input is realized by the command and data input method provided by Windows operating system. The menu function realizes command input, such as run, pause, print, etc., and the dialog box is used for data input.
