ELESTA controller German ELESTA model ELESTA price

ELESTA controller refers to a master command device that controls the starting, speed regulation, braking, and reversing of motors by changing the wiring of the main circuit or control circuit and changing the resistance value in the circuit according to a predetermined sequence. It consists of a program counter, instruction register, instruction decoder, timing generator, and operation controller. It is the "decision-making mechanism" for issuing commands, i.e., it coordinates and directs the operation of the entire computer system. Controllers are divided into combinational logic controllers and microprogrammed controllers, each with its own advantages and disadvantages. Combinational logic controllers are troublesome to design and have a complex structure; once the design is completed, they cannot be modified or expanded, but their speed is fast. Microprogrammed controllers are easy to design, have a simple structure, and are easy to modify or expand. To modify the function of a machine instruction, only the corresponding microprogram needs to be recompiled; to add a machine instruction, only a segment of microprogram needs to be added to the control memory. However, it operates by executing a segment of microcode. The specific comparison is as follows: A combinational logic controller, also known as a hard-wired controller, is composed of logic circuits and relies entirely on hardware to implement instruction functions.

ELESTA controller introduction

Motion control usually converts predetermined control schemes and planning instructions into desired mechanical motion under complex conditions, achieving precise position control, speed control, acceleration control, and torque or force control of mechanical motion. According to the different power sources used, motion control can be mainly divided into electrical motion control using electric motors as the power source, pneumatic and hydraulic control using gas and fluid as the power source, and heat engine motion control using fuel (coal, oil, etc.) as the power source. According to statistical data, more than 90% of all power sources come from electric motors. Electric motors play a very important role in modern production and daily life, so among these types of motion control, electrical motion control is the most widely used. Electrical motion control evolved from electric drive; electric drive or electrical transmission is a general term for control systems targeting electric motors. Motion control systems vary, but in terms of basic structure, the hardware of a typical modern motion control system mainly consists of a host computer, motion controller, power drive unit, motor, actuator, and sensor feedback detection device. The motion controller is a control device with a central logic control unit as the core, sensors as signal sensing elements, and motors or power devices and execution units as control objects. [A motion controller is a dedicated controller for controlling the operating mode of an electric motor: for example, an electric motor drives an object upward to a specified position via a limit switch controlling an AC contactor, and then moves downward; or a time relay controls the forward and reverse rotation of the motor, or rotates for a while, stops, rotates again, and stops again. Motion control applications in robotics and CNC machine tools are more complex than in special-purpose machines, because the latter have simpler motion forms, often referred to as general motion control (GMC). The motion controller is the main component determining the performance of an automatic control system. For the Mitsubishi series, the motion CPU is the motion controller. For simple motion control systems, a motion controller designed with a microcontroller can meet the requirements and offers high cost-performance ratio.

ELESTA controller structure

1) Instruction register: Used to store the instruction currently being executed. An instruction is divided into two parts: opcode and address code. The opcode indicates the nature of the instruction's operation, such as addition, subtraction, etc.; the address code provides the address of the operand for this instruction or relevant information for forming the operand address (the operand address is formed through an address formation circuit). There is an instruction called a branch instruction, which is used to change the normal execution sequence of instructions; the address code part of this instruction provides the address of the instruction to be executed next. 2) Opcode decoder: Used to decode the opcode of the instruction, generate corresponding control levels, and complete the function of analyzing the instruction. 3) Timing circuit: Used to generate time marker signals. In microcomputers, time marker signals are generally three-level: instruction cycle, bus cycle, and clock cycle. The micro-operation command generation circuit generates various micro-operation commands required to complete the operations specified by the instruction. The main basis for generating these commands is the time markers and the nature of the instruction's operation. This circuit is actually the circuit implementation of the expressions for each micro-operation control signal (such as the A→L expression above); it is the most complex part of the combinational logic controller. 4) Instruction counter: Used to form the address of the next instruction to be executed. Usually, instructions are executed sequentially, and instructions are stored sequentially in memory. Therefore, under normal circumstances, the address of the next instruction to be executed can be formed by adding 1 to the current address; the micro-operation command "1" serves this purpose. If a branch instruction is executed, the address of the next instruction to be executed is the target address. This address is in the address code field of the current branch instruction and is sent directly to the instruction counter. The proposal of the microprogrammed controller was due to the disadvantages of combinational logic design, such as being inconvenient to design, inflexible, and difficult to modify and expand.

ELESTA controller installation

When installing the controller, avoid the following locations: (1) Ambient temperature exceeds the range of 0~50 degrees Celsius. (2) Relative humidity exceeds 85% or condensation exists (caused by sudden temperature changes or other factors). (3) Direct sunlight exposure. (4) Corrosive and flammable gases, such as hydrogen chloride, hydrogen sulfide, etc. (5) Large amounts of iron filings and dust. (6) Frequent or continuous vibration, with a vibration frequency of 10~55 Hz and an amplitude of 0.5 mm (peak-to-peak). (7) Shock exceeding 10g (gravitational acceleration). To ensure reliable operation of the control system, programmable controllers are usually installed in control cabinets with protective enclosures to prevent dust, oil, and water splashes. To ensure that the temperature remains within the specified ambient temperature range, there should be sufficient ventilation space for the installed equipment, with an interval of more than 30 mm between the basic unit and the expansion unit. If the surrounding environment exceeds 55 degrees Celsius, install an electric fan for forced ventilation. To avoid electrical interference from other peripheral equipment, the programmable controller should be kept as far away as possible from high-voltage power lines and high-voltage equipment; a distance of at least 200 mm should be maintained between the programmable controller and high-voltage equipment and power lines.

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