Bản tài liệu của hệ thống cân băng định lượng.Chi tiết các thông số của đầu cân lccont plus 403. Ngoài ra còn chi tiết các bài toán của cân băng. Hiện tại đang được sử dụng trong nhà máy xi măng trung sơn. chuyên viên hiệu chỉnh Nguyễn Tùng Minh Tuấn
DEL/DEM WEIGHFEEDER OPERATION MANUAL (LCCONT PLUS 403) Chengde LIONCH Measure & Control Equipment Co., Ltd DEL/DEM Operation Manual LIONCH １ CONTENTS 1. Overview …………… …… ………….………… ………………………………………….…1 2. Technical Data …………………………… ……….…………….……………………………… 2 3. Working Principle…… …………………… ………………….……………………………… 5 4. Structure ……… …………………………….………………… ……………………………. 8 5.Operation and Display ……… …………………………….………………… …………… 11 6. Parametric Comments…… ……………………………….…………………….……………. 19 7. Event Message ……… …………………………………….…………… … ….….……… 34 8. Installation and Adjustment………….……………… …………………….… …….……… 39 9. Maintenmance…………… ……………………………….………… ……………….……….41 DEL/DEM Operation Manual LIONCH １ 1. Overview DEL/DEM weighfeeder is an advanced continuous weighing and feeding equipment. DEL/DEM weighfeeder can automatically adjust flow rate to a setpoint by predetermined program according to desired feeding quantity. It can continuously convey bulk material and also feed in a constant rate with automatic measuring and totalizing. DEL/DEM weighfeeder is an ideal equipment for the proportioning and weighing of bulk material with good accuracy, wide adaptability, long-term stability, and high reliability, especially normal performance in poor conditions. It can be widely used in cement, building materials, metallurgic, mineral, chemical, chemical fertilizer and grain food industry etc. Weighfeeder provides advanced technical methods for increasing product quality, saving energy and improving automation level for the system. DEL/DEM weighfeeder is an integration of machinery, electronics and instruments. It can be controlled by instrument keyboard, serial interface, analog input and also automatically controllefd by a high computer. Some Definitions: I = Feed rate in kg/h or t/h Material amount discharged from belt per unit time. P = Feed rate setpoint in kg/h or t/h Preset feed rate for which actual value is controlled. Z = Feed amount in kg or t V = Speed of conveyor belt in m/s Q = Belt load in kg/m Weight of material load on one belt meter. QB = Platform load in kg Y = Controller control magnitude in mA Xd = Control deviation in % Setpoint/actual value DEL/DEM Operation Manual ２ LIONCH 2. Technical data ▲ Accuracy: ±0.5% of set flowrate ▲ Feed rate: 0.5 t/h ~ 1500 t/h ▲ Speed of Conveying belt: ≤0.4 m/s ▲ Material Temperature: Normal : ≤100℃ Special design: ≤180℃ ▲ Power Supply: 380VAC+10%-15%，50Hz or 60Hz ±2% ▲ Environment Temperature：Mechanical System: - 30℃～70℃ Controller Cabinet : 0℃～45℃ ▲ Specifications： D E □ □ □ □ L Lighr-duty: Diameter of roller is 190mm. M Heavy-duty: Diameter of roller is 320mm. Wide of belt: 06: 650mm 08: 800mm 10: 1000mm 12: 1200mm 14: 1400mm 16: 1600mm 18: 1800mm Distance of roller centers: 13: 1300mm 15: 1500mm Distance of rollers centres Type of hopper Wide of belt L : Light-duty M: Heavy-duty Electronics Contant feeding DEL/DEM Operation Manual LIONCH ３ 20: 2000mm 27: 2700mm 35: 3500mm 40: 4000mm 45: 4500mm 50: 5000mm Type of hopper: Hopper of T4, T6, T20, V2, V5, S1, S2 can be selected according to the wide of belt and characteristics of materials. ▲ Type of Meter: LCCONT PLUS 403 ▲ Load Cell: 10VDC , min. 80Ω, short-curcuit-proof ▲ Speed Sensor: Input 0.05 ～ 2500Hz, 2-core proximity swtch(Namur) ▲ Input Signal: Analog input: 0/4 ~ 20 mA ，500Ω Keyboard Serial interface: RS422 Control input: 3, galvanically isolated ▲ Output Signal: Analog output: 0/4 ~ 20 mA ， 500Ω Serial interfaces: RS232 Control output: 7, N/O relay contacts, Max. 230VAC，1A Pulse output: +24V，100 mA max.10 Hz ▲ Display: Clear text fluorescent display, 2 lines with 20 digits each, 6mm character height ▲ Display Event Messages ▲ Fail-safe Data Memory (EEPROM) ▲ Displays: Upper Display: Setpoint Lower Display: Totalizing Counters Z1 ~ Z3 Absolute Feed rate I Relative Feed rate Ir Load Q DEL/DEM Operation Manual ４ LIONCH Regelabweichung Xd Belt Speed V Preselect lower display by cursor operation. ▲ Dialog Language: english ▲ Unit(selectable) SI units: kg, kg/h t, t/h m, cm ▲ Controller of belt speed : frequency-converting governor or DC governor ▲ Size of control cabinet:: 800x600x2200mm. DEL/DEM Operation Manual LIONCH ５ 3. Working Principle 3.1 Measuring Principle A belt weigher continously weighs the amount of material transported on a conveyor belt. Belt Load The material is guided over a platform arranged below the belt and limited by one carrying idlers.The platform load applies a force on load L/C via weighed idler. Deflection for measurement is approx. 0.2mm. The weighed idler are connected to the frame structure, e.g. by a leaf spring parallel system. Being proportional to platform load, the load cell output voltage is amplified and routed to the INTECONT microprocessor with the aid of an analog/digital converter. The white triangle indicates the distribution of load on a single-idler weighing platform. Only half of the material weight force is applied to the weighed idler. In weighing technology, the load relation is normally converted into belt length. L eff = 2 Lg Thus belt load in kg/m is as under. Q = Leff QB Belt Speed As further measure for feed rate, belt speed V is acquired by speed transducer and converted into the respective pulse frequency. L eff = Effective belt length L g = Over all platform lenth QB = Total platform load DEL/DEM Operation Manual ６ LIONCH If belt speed is constant and demands on accuracy are not too high, speed measurement can be omitted. Feed rate Measured values Q and V are normalized by the INTECONT to physical magnitudes kg/m and m/s and multiplied with one another. The result is fede rate I. I = Q·V = Leff QB ·V·3.6 3.2 Control Process A conveyor belt extracts material from surge bin. Setpoint W and actual fede rate P are compared, the difference, routed to controller R. Controller keeps varying belt speed until actual value equals setpoint. 3.3 Operating Modes 3.3.1 Gravmetric Normal controlled mode. See 3.2 3.3.2 Volumetric Uncontrolled mode, belt speed is controlled in proportion to setpoint. The measured feed rate is not considered. Both modes are selected in the dialog mode. 3.4 Speed Control Two modes are adopted to control the speed: DC volts adjusting mode and AC frequency-converting mode. 3.4.1 DC Volts Adjusting Mode In this mode, the belt speed is adjusted by changing the voltages of DC motor’s armatures so as to adjust the motor speed. It has advantages of precise speed adjustment, good mechanism, big start torsion. But the mode is basically out of use for its disadvantages of consuming too much power and wanting too much maintenance. 3.4.2 AC Frequency-Converting Mode In this mode, the belt speed is adjusted by changing the power frequency of AC motor so as to adjust the motor speed. It has advantages of consuming less power and less maintenance. This I in t/h v in m/s Q in kg/m QB in kg L eff in m DEL/DEM Operation Manual LIONCH ７ mode is widely used for the sound technology of frequency conversion. DEL/DEM Operation Manual ８ LIONCH 4 . Structure 4.1 Constitute of System The system consists of mechanical and electrical parts. The mechanical parts includes weighing scale, governor motor, gear box and hopper. The electrical parts includes control cabinet and electrical elements used for local control. The control cabinet includes control meter, air switch, wiring points and frequency-converting governor or DC governor. The electrical elements includes load cell, speed sensor, belt limit switch, connection box and local control box. 4.2 The Structure of Electrical 4.2.1 Control Meter The meter is advanced LCCONT PLUS 403. Specifications ■ System accuracy better than 0.05% ■ Exact speed measurement ■ Optimum control system ■ High electromagnetic compatibility ■ Galvanically isolated outputs ■ High degrees of protection ■ Fail-safe data memory (EEPROM) ■ Integrated diagnostics and self-test function (SPC) ■ Fast setting function ■ Auto calibration function ■ Feed rate pulse (level and pulse width) settable by parameter ■ Status, event, calibration and quantity reports ■ Simulation mode for testing and training 4.2.2 Load Cell The imported arm-suspended resistant load cell has high accuracy and stability. 4.2.3 Speed Sensor The 2-wire switching speed sensor has no maintaining quantity because of its non-touching design technology. 4.2.4. Belt Limit Switch The switches, fixed on both sides of the belt, will stop the system and give an alarm to prevent [...]... Error >5% : KOR < 0.95 or KOR >1.05, Deviation of several percents indicate fault technical data or mechanical errors 5.5.5 Set Time Program: Use set time program to set date and time of the LCCONT PLUS 403 Sequence: Enter function distributor and run“Set Time” program Start Enter year, month, day, hour, minute, second Acknowledge each entry Cancel figure entered last Abort After power failure, time... Not acquired in volumetric mode 23 Z0: E yy xxxx Pulse output of external totalizing count 5.9 Programming 5.9.1 Parameters: Parameters are changeable characteristics or data used to match the LCCONT PLUS 403 to the application: Display format and units, limit values, calibration and rated data, etc The parameters are classified in functional blocks A…Q and, within a block, described by Name, number... Residual run time in % of total run time Lower display: Averaged tare in % of nominal load Acquire and store result Do not acquire result 5.5.4 Check Weight Program CW: Use program CW to check the LCCONT PLUS measuring range Weighing platform is loaded with a known tare weight and platform load mean value is automatically acquired over one or multiple integer belt circuits The result is compared with a