Automatic dosage system is an important part of the reactor mixing production process, through the electronic weighbridge directly collects the weight signal, automatic control of weighing, the operator through the keyboard or mouse in the upper computer human-machine interface (HMI) to enter the dosage information (dosage type, weight, etc.), monitor the whole process of the dosage control, print the dosage of the results and the production of the report, to achieve the integration of measurement, control, and management of the process of the dosage, is a practical and effective way to achieve the dosage process. It is a practical and effective method to realize the integration of measurement, control and management of the feeding process.

The dosing system applies the configuration software to complete the data acquisition and process control support a variety of communication protocols to provide users with a variety of equipment support, colorful dynamic screen and the powerful functions of the system, so that you can easily operate with a strong scalability, easier to integrate with other systems, and more effective protection of the user's investment. The redundant station utilizes two redundant CPUs to improve higher availability and safety, and the switch automatically switches from the running system to another in case of failure.

The weighing and unloading system adds the required materials into the mixing bin in turn according to a certain ratio. At the same time, PLC monitors the pulse signal sent by the material level meter to determine the position of the material in the bin, so as to control the on-off of the charging valve; After the feeding is completed, according to the preset mixing delay time, the PLC starts the mixing motor to ensure that the material is fully stirred in the mixing bin to complete the mixing operation; Then enter the discharge and pressing stage, the PLC controls the discharge valve action, the material is output from the mixing bin, pressed into the storage tank, complete a cycle of automatic batching control process.

The weighing process of the weighing module of the batching control system is completed by the FTA decomposition (including the speed and speed conversion of materials). The storage and call of the formula is directly entered into SIWAREX FTA by the weight signal (mV analog signal) given by the weighing module. The control of the charging sequence of the dosing system, the generation and management of reports and alarms, etc., rely on the CPU of FX2N. The determined action signal is given to the PLC I/O card and then the PLC I/O controls the electrical equipment.

The batching control system includes screw conveyor, storage bin, gate, cutting device, weighing body, support, electrical control device, etc. The feeding device is fast and slow two-stage feeding mode. The PLC sends a signal to the cylinder to drive the plunging plate to work, and the material in the hopper flows into the weighing bucket, and the weighing module above the weighing bucket sends a signal to the PLC, so as to control the operation of the cylinder. When the weight is approaching the required weight, the PCL sends a signal to the cylinder with plunging plate, so as to slow down the discharge speed. When the value reaches the weighing module, the PLC sends a signal to the cylinder and the plunging plate seals the material port.

Weighing and batching system is composed of computer and PLC, weighing instrument, weighing module and signal distributor, PLC is used to configure switching control such as starting and stopping and opening and closing of the warehouse door, detecting the state of the warehouse door and running configuration, and carrying out system interlocking of the batching system. PLC and weighing control instrument are connected by I/O collar, and directly join in the batching control. PLC and weighing control instrument are connected by I/O, directly joining the batching control. It has the results of weighing signal collection, fast and slow adding control and self-tuning of overshoot, etc. It can modify the input and parameters of the material side. Each scale is equipped with three weighing modules, whose signals are fed into the distributor, connected in parallel to the bridge wall, and the voltage is divided and sent to the weighing instrument.

In the batching control field environment, the analog signal of the weighing module is transmitted by shielding and hardware filtering, and the digital signal after A/D conversion is filtered and processed by software, so that the high precision weighing value can be obtained. In the process of system batching, the control can automatically detect the failure of the switch of the weighing door and the mixing door and the failure of the feeder. It is obtained by detecting the status signal of the feedback stroke switch. When a fault or error is detected, the fault location is displayed on the CRT screen.

The mixing dosing system outputs a certain number of square wave pulses through PLC programming to control the Angle of the stepper machine and then control the dosing feed of the servo mechanism. The loop pulse distributor distributes the control pulses output by the programmable controller to the corresponding winding according to the power sequence of the stepper motor. The pulse distribution of the stepper motor controlled by PLC can be realized by software such as batching, capping, sealing, palletizing, weighing equipment and corresponding conveying.

The automatic batching system is used as a central control area to complete the whole process of weighing and feeding. Before the equipment is equipped, the staff will open the switch, and the PLC central control area will send a signal to start the corresponding solenoid valve to inject the material into the reactor. At the same time, the weighing module will start to work. When the amount of the reaction tank is increased to the equivalent of the weight set by the quantitative setting reference, the central control area receives the action signal of the weighing module, and immediately closes the solenoid valve for adding materials and stops adding materials.