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Generally, using PLC as an intermediate tool for HMI to control VFD is a good choice. Now, let’s us establish and HMI to control the VFD project. We need to communicate with an Omron PLC and use the PLC commands to control the VFD. Set the PLC model and communication parameters (RS232, Host Link communication protocol) that need to be communicated.

Foam cutting is a device for processing materials in the chemical industry such as foam and sponges. It mainly uses the high temperature of the laser machine for cutting because the thin cutting of the laser beam is not easy to deform, the incision is smooth, and there is no paste edge. The object can be rubber, glass, stainless steel, plastic, aluminum alloy, or metal.

As the seasons are changing and climate change is unpredictable, we start to think of the various maintenance needed around the home such as changing the furnace filters, changing smoke detector batteries, making sure we have a good battery in our vehicle, etc. So, this is also a good time to do a check-up and perform general maintenance on your phase converter!

A programmable logic controller (PLC) or programmable controller is an industrial computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis. A variable-frequency drive (VFD) is a type of motor drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and, depending on topology, to control associated voltage or current variation.

A single-phase isolation transformer is a transformer whose primary winding is a single-phase winding. The primary winding and secondary winding of a single-phase transformer are wound on the iron core. The primary winding is the AC voltage input terminal, and the secondary winding is the AC voltage output terminal. The output voltage of the secondary winding is proportional to the number of turns of the coil. A single-phase transformer can convert high-voltage power supply into single-phase low-voltage for use in various equipment. For example, AC 6600V high voltage can be converted into AC 220V low-voltage through a single-phase transformer to supply power for lighting or other equipment. The single-phase transformer has a simple structure, With the advantages of small size and low loss, it is suitable for use in low-voltage distribution lines (below 60Hz) with less load.

Air compressor is a device used to compress gas. The air compressor is similar in construction to the water pump. Most air compressors are designed by reciprocating piston, rotary vane or rotary screw. Centrifugal compressors are very large applications. Next, we will introduce the structure of the air compressor. We hope that after reading this article, you will have a better understanding of air compressors.

Through beam photoelectric switch is composed of a light emitter and a light receiver, and the detection distance can be increased by separating the light emitter and the light receiver. Its detection distance can reach several meters or even tens of meters. When in use, the light-emitting device and the light-receiving device are respectively installed on both sides of the passing path of the detection object. When the detection object passes through, the light path is blocked, and the light-receiving device acts to output a switch control signal.

Digital load cell amplifiers are also called weighing transmitters. It can convert physical quantities into electrical signals, and convert the sensors outputting millivolt signals into standard DC signals through isolation and amplification. It usually adopts SMT process and is designed and manufactured for resistance strain signal sensors in industrial processes, and is suitable for load cells of different specifications.

Relays are an electronic control device with a control system (that is, an input loop) and a controlled system (output loop), and are usually used in automated control circuits. The relay is actually an "automatic switch" that uses a small current to control the operation of a large current. It plays the role of conversion circuit, automatic adjustment and safety protection in the circuit.

Toroidal transformer is a large type of electronic transformer and has been widely used in home appliances and other electronic equipment with high technical requirements. Its main use is as a power transformer and an isolation transformer.Toroidal transformers have been widely used in electronic equipment with
high technical requirements such as computers, medical equipment, telecommunications, and instruments.

A variable frequency drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage of its power supply. The VFD also has the capacity to control ramp-up and ramp-down of the motor during start or stop, respectively. Even though the drive controls the frequency and voltage of power supplied to the motor, we often refer to this as speed control, since the result is an adjustment of motor speed. In this article, we will test VFD constant pressure water supply system.

UPS is an uninterruptible power supply with energy storage device. It is mainly used to provide uninterrupted power supply to some devices that require high power stability. When the mains input is normal, the UPS will stabilize the mains and supply it to the load. At this time, the UPS is an AC voltage stabilizer, and it also charges the battery inside the machine; when the mains is interrupted (accidental power failure) When the UPS is switched on, the UPS will immediately supply 220V AC power to the load by switching the DC power of the battery to the load, so that the load can maintain normal operation and protect the software and hardware of the load from damage. UPS devices usually provide protection against overvoltage or undervoltage.

Alternating current power is a form of electricity in which power flows constantly in changing directions. Since the early 19th century, AC is the form of power that has been used in homes and businesses. However, for most businesses and industries, three phase AC power provided by single phase to three phase converters is used because it accommodates higher power loads. Three phase power consists of 3 power wires and each one of them is 120 degrees out of phase with each other.

There are many types of air compressors. According to different standards, air compressors can be divided into different types. Today, we will introduce a kind of air compressor—screw compressor in detail.

The proximity sensor is a general term for sensors that replace contact detection methods such as limit switches and are designed to detect without touching the detection object. It detects the movement and presence of objects and converts them into electrical signals. The principle of PNP and NPN sensors is to use the saturation and cut-off of triodes to output two states, which belong to switch sensors, but the output signals are diametrically opposite. high level and low level. NPN output is low level 0, and PNP output is high level 1.

The principle of hipot tester is to apply a voltage higher than normal working voltage to the insulator of the device under test for a specified period of time. If the insulation is good enough, the voltage applied to it will only produce a small leakage current. If a device maintains its leakage current within the specified range for a specified period of time, it can be determined that the device under test can operate safely under normal operating conditions. This article will introduce safe operation of hipot tester.

Programmable relay stores some typical relay logic control program in internal memory in advance and realize some simple logic control and sequence control function by the user program combination and calls. Its integrated internal software function and programming software can replace the traditional relay logic circuit, such as the logic circuit composed of relay, contactor and timer, and has a strong anti-interference ability. Therefore, programmable relay is widely used in industrial automation control system, small machinery and devices, building electrical and other fields. It is applicable to the control of intelligent residence system, lighting system, heating and ventilation system, door, window, fence and moving door.

The torque sensor calibration device is divided into two categories: dynamic and static. Dynamic torque sensors can also be called torque sensors, torque-speed sensors, non-contact torque sensors, and rotational torque sensors. Torque sensors are the detection of torsional torque sensing on various rotating or non-rotating mechanical components. ATO torque sensors convert physical changes in torque into precise electrical signals. It can be used in the manufacture of viscometers and electric (pneumatic, hydraulic) torque wrenches, with the advantages of high precision, fast frequency response, good reliability and long life.

Economy linear stepper motor is a stepper motor with lead screw, this stepper motor can be used in many high-precision requirements including precision calibration, precision fluid measurement, and precise positional movement, it can directly move linearly, which can make the machine miniaturized. The step size of the linear stepper motor is determined by the step angle of the motor and the pitch of the internally threaded nut and the lead screw. In order to ensure high working efficiency, there must be a certain degree of freedom between the rotor and the lead screw, which requires a certain gap between the two, which is about 0.03 to 0.08 mm backlash.

HMI, short for human machine interface, is a medium for interaction and information exchange between systems and users, which realizes the conversion between the internal form of information and the form acceptable to humans. Human-machine interfaces exist in all fields that participate in the exchange of human-machine information. So, how do HMI and PLC control VFD?