Hollysys PLC - the importance of PLC industrial gateway

1. View the data on the monitoring screen When the following situations occur, it means that there is a problem with the control system, and the microcomputer maintenance personnel should be notified immediately for maintenance, and the operator should go to the site to deal with it. (1) Frequently changing data does not change for a long time, and several or all data do not ...

1. The output accuracy is as high as 0.05%, which greatly improves the operation efficiency of the system. 2. The full-scale output of the channel signal is 0-22.7mA, and the output range is wide; 3. It can be adapted to the enhanced base to achieve channel resistance to 220VAC; 4. It has a perfect channel signal diagnosis function, which can be realized.

In order to improve the anti-interference ability of the PLC system, we should start from the design. In the anti-interference design of specific projects, products with strong anti-interference ability can be selected to improve the anti-interference of equipment and systems by suppressing interference sources, cutting off or attenuating the transmission path of electromagnetic interference, and using software means.

On September 20, 2022, Berlin time, the 13th Germany Berlin International Rail Transit Exhibition (InnoTrans 2022) opened at the Berlin International Exhibition Center in Germany. Following the 2018 exhibition, Hollysys once again appeared at the Berlin International Railway Exhibition (hereinafter referred to as the Berlin Exhibition) ...

1. What is a communication protocol? A communication protocol is an agreement between two parties to a communication. The agreement includes uniform provisions on data format, synchronization mode, transmission speed, transmission steps, error detection and correction mode, and control character definition, etc., which must be complied with by both parties to the communication. Therefore...

1. Configuration of the control loop The configuration of the control loop is essentially to use the various basic functional modules provided by the system to form a variety of actual control systems. At present, the configuration methods provided by various DCSs are different, and they can be summarized as having a specific computing module connected ...

According to the different functions of PLC, PLC can be divided into three categories: low-grade, mid-range and high-end. (1) Low-grade PLC Low-grade PLC has basic functions such as logic operation, timing, counting, shifting, self-diagnosis, monitoring, etc., and can also have a small amount of analog input/output, arithmetic operation, math...

1. The application form of PLC in CNC machine tools PLC is used in CNC machine tools, and there are usually two forms: one is called built-in: the other is called free-standing. Built-in PLC is also known as integrated PLC, the CNC system in this way, at the beginning of the design of the NC and PLC combined ...

Recently, the signing ceremony of the strategic cooperation between Bureau Veritas and Hollysys and the functional safety certification ceremony of Hollysys valves were held in the Hangzhou base of Hollysys. Mr. Ye Jiong, General Manager of Bureau Veritas Technology Center, Mr. Zhong Aimin, Director of Product Certification Center, Mr. Yang Yang, Sales Director of Eastern Region, and Mr. Yang Yang, Director of Functional Safety ...

(1) There are three forms of programmable controller: relay output, thyristor output, and transistor output. (2) The wiring of the output terminal is divided into independent output and common output. When the output relay or thyristor of the PLC is activated, the two output terminals of the same number are turned on. In different groups, you can ...

At 15:05 on January 12, 2022, Datang Anhui Luoneng Power Generation Co., Ltd. (hereinafter referred to as Datang Luohe) successfully completed the full-load trial operation of Unit 5 after comprehensive upgrading, marking the smooth operation of Unit 5 of Datang Luohe Power Plant after the transformation. Hollysys HOLLiAS MACS IC completely ...

(1) The ambient temperature exceeds the range of 0-50 °C; (2) The relative humidity exceeds 85% or there is dew condensation (caused by sudden temperature changes or other factors); (3) direct sunlight; (4) There are corrosive and flammable gases, such as hydrogen chloride, ...

1. Check the circuit according to the drawing (without power transmission) The drawings of the general PLC system include two parts: the drawings in the cabinet and the drawings outside the cabinet; The drawing in the cabinet refers to the wiring diagram inside the cabinet; The out-of-cabinet drawings are the wiring diagrams of all electrical cabinets that are connected out. This part needs to be checked for; 1. Drawings ...

In general, PLCs are extremely reliable devices with a very low failure rate. The probability of hardware damage such as the CPU of the PLC or software running errors is almost zero; If the PLC input point is not caused by strong current intrusion, it will hardly be damaged; The normally open point of the PLC output relay, if it is not a short circuit of the peripheral load ...

Facing China's "double carbon" strategic goals, the Beijing Economic and Technological Development Zone is guiding a large number of enterprises to explore the implementation plan of "carbon peak" and "carbon neutrality", and strive to build a number of green factories, green products and green supply chains. Recently, enterprises in the zone and Lisi Group signed a contract for the first time in China to use CO (dioxide...

Hollysys, as the PC general contractor, participated in the construction of the first smart water project in the domestic nuclear power industry (1) - Qin's No. 2 Plant Chengjing Water Intake Smart Operation and Transformation Project, which was recently completed and put into operation. The project is independently implemented by Hollysys, and Hollysys is independently controllable, safe and reliable, and deeply developed by the nuclear high-tech project.

Various brands of PLCs have a self-diagnosis function, but the trick of PLC repair is to make full use of this function to analyze and then pinpoint the problem. Sorted out the 8 common types of errors that PLC repairmen need to know when the PLC presents abnormal alarms. 1. CPU abnormality ...

1. What is serial communication? Serial is a very versatile protocol for device communication on a computer (not to be confused with Universal Serial Bus or USB). Most computers contain two serial ports based on RS232. The serial port is also an instrument ...

1. The switching quantity is also called the logical quantity, which means that there are only two values, 0 or 1, ON or OFF. It is the most commonly used control, and controlling it is the advantage of PLC, and it is also the most basic application of PLC. The purpose of switching control is to follow the current input combination with the historical input according to the switching quantity.

Serial communication is done using 3 wires: (1) ground, (2) sending, and (3) receiving. Since serial communication is asynchronous, ports are capable of sending data on one wire and receiving data on the other. Other threads are used for handshakes, but are not required. Serial communication is the heaviest ...