The pre-set dosing plan of the weighing and mixing equipment automatically weighs various materials, automatically controls each link of dosing, and completes the dosing process. According to the amount of feeding, the speed of the motor is controlled. When the feeding value is close to the set value, the low-speed feeding mode is adopted. Due to the retention of materials in the air between the feeding port and the feeding tray, the motor stops rotating when the control lead is reached. When the actual batching process reaches the control lead amount, due to the difference in material density, the quality of the air material retained after the motor stops rotating is different, and the lead amount of the motor stop is set according to the actual operating condition.
020-34563445Dosing equipment integrates computer technology, automatic control, communication technology and weighing technology into one, with perfect control function, centralized display and operation, convenient data processing, simple installation and maintenance, and easy expansion of the system. In the structure of the computer centralized control system to solve the "danger of centralized" problem, to achieve "centralized management of the danger of decentralized", the system is stable and reliable to meet the use of continuous production process.
Weighing and batching equipment application 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 system's powerful features, so that you can easily operate the Batching system has 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, which improves higher availability and safety. According to the principle of one out of two, the switch automatically switches from the running system to the other in case of failure.
The dosage control system disperses the danger and improves the reliability of the system under the premise of centralized management of information and scientific operation in the production process, collects all kinds of data on the site with PLC and transmits them to the central control room for centralized monitoring and management through high-speed network, and the host computer of the central control room also transmits the control commands to the PLC measurement and control terminals through the high-speed network to carry out the decentralized management of each unit.
Adoption of an industrial PC as upper computer (industrial computer, fully compatible with ordinary computers, more adapted to harsh industrial environments) + PLC + weighing module (or sampling board for weighing signals) + load cell + weighing actuator. It can contain measurement control host (host computer), weighing software (measurement software/control software), plc weighing control instrument, load cell, hopper weigher, bin weigher, in the way of incremental and decremental weigher); and in most cases it is controlled by frequency converter.
Weighing and dosing equipment has the following advantages:
(1) The whole system adopts the hub-and-spoke structure, good openness, easy to expand, stable and reliable performance" structure mode: "upper computer + PLC system + solid dosage control instrumentation", each part of the equipment is connected using RS485 field bus, the structure is simple and reliable.
(2) The weighing instrument is characterized by high precision, high reliability and strong anti-interference ability. The load cell selects high-precision weighing module, and the weighing module is easy to install and maintain.
(3) weighing and feeding system using a powerful computer monitoring and management, real-time collection, timely display of operating conditions and relevant data, the picture image is realistic, dynamic; can automatically complete the system dosage process, the computer screen real-time display of the weighing and dosage control system workflow, the software is simple to operate, the picture is realistic.
(4) The upper computer software sets running password and important parameter password modification protection, and the user realizes hierarchical management, can arbitrarily define the authority of personnel. Intelligent reporting software for production management provides a large amount of data information, such as dosage results list, raw material consumption list, production volume list, formula use results records, etc., can be produced by time, formula and other production shift report, daily, monthly and annual reports and other statistical and printing functions.
(5) Fault response is accurate and timely, can automatically display or print the time, nature and location of the fault, and sound and light alarm; control mode can be divided into remote automatic, local automatic, local manual and local instrument control and other modes of operation.
