On August 16, 2021, the Tarim Oilfield Natural Gas Ethane Recovery Project, the largest natural gas deep processing base in Xinjiang (1), a key project of PetroChina, was successfully completed and put into operation, with stable operation and the production of qualified ethane products. Tarim Oilfield Natural Gas Ethane Recovery Project ...

First, the working environment (1) Temperature The PLC requires that the ambient temperature is 0-55oC, and it cannot be placed under the components with large heat generation during installation, and the surrounding ventilation and heat dissipation space should be large enough. (2) Humidity In order to ensure the insulation performance of PLC, the relative humidity of the air ...

(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, ...

With the development of society, PLC programmable controller has been widely used in industrial production, but its maintenance and overhaul methods and skills, many engineers are not lawful, the following is to introduce the experience and skills of PLC use process. 1. PLC input and output A ...

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.

1. Switch logic control Switching logic control is the basis of PLC. It is the first use case and the most extensive of all. Replace the previous relay circuit control and realize logic sequence control; It can be used for the control of stand-alone equipment, and can also be used for group control and ...

On the morning of October 20, 2021, at the Epec Industrial Products Exhibition, Hollysys released a new 100% localized system - 'HOLLiAS MACS IC fully autonomous and controllable DCS system'. The system integrates the controller microkernel architecture independently developed by Lisi, embedded ...

1. Confirm that the new computer has relevant interfaces and can be used normally, and Hollysys DCS software can run on the computer operating system 2. Device and Lisi DCS software, dongle, and related drivers (mainly redundant network cards, data hard disks, etc.) 3. Set up ...

Since the reform and opening up, China's economy has developed rapidly, and many enterprises have improved production efficiency by introducing foreign production equipment and DCS systems. However, with the growth of the use years, many foreign DCS systems and equipment have gradually aged and are not suitable for the current production needs, so they are localized.

1. It is used for switching control The ability of PLC to manipulate switching quantities is very strong. The number of points in and out of the control, less than a dozen points, dozens of points, more can be hundreds, thousands, or even tens of thousands of points, because it can be networked, the number of points is almost unlimited, no matter how many points can be controlled, the control ...

1. Use the analog output module of the PLC to control the analog output module of the inverter The analog output module of the PLC outputs a 0-5V voltage signal or a 4-20mA current signal, which is used as the analog input signal of the inverter to control the output frequency of the inverter. This control method is simple to wiring, but it needs to be selected and changed.

LK is a programmable controller (PLC) product launched by Hollysys for medium and high-performance control fields. It fully integrates the advantages of DCS and PLC, adopts high-performance analog processing technology, miniaturized structural design, open industry standards, and a universal system platform, so that ...

Whether it is a new unit or an upgraded DCS, the equipment of the system and controller should focus on the reliability and load factor (including redundancy) objectives. The load rate planning of the communication bus must be controlled within a reasonable range, and the load rate of the controller should be balanced as much as possible.

The steps of DCS system troubleshooting include: (1) Check the fault caused by improper use. Common types of operational faults include operator errors, terminal wiring faults, module installation faults, and power supply failures. (2) Troubleshoot the improper operation of the DCS system ...

Fourth, the fundamental sequence of repairing PLC. 1. Start first. 1) When repairing the PLC, do not start directly immediately, but first ask about the situation and the phenomenon of the problem before and after the problem; 2) If you repair an unfamiliar PLC, you should first understand its operating principle. ...

First, the type of failure of the PLC. 1. External equipment failure. External equipment refers to various switches, sensors, actuators, loads, etc., which are directly connected with the PLC operation process. The failure of these equipment will directly affect the control function of the PLC system. Therefore...

Hollysys Automation provides automation solutions for many fields. 　　Intelligent TCM solutions In order to make the drug achieve the harmony and unity of the doctor's peace of mind, the pharmacist's formula, and the patient's peace of mind, higher requirements are put forward for the pharmacy environment and hospital management. But...

Kunming Changshui International Airport is one of the eight regional hub airports in China and one of the five national large-scale gateway hub airports. With the rapid economic development of Yunnan Province, the aviation business volume of Kunming Airport has grown rapidly.

LE series is a new generation of high-performance small and medium-sized PLC products launched by Hollysys, which is suitable for small and medium-sized industrial equipment control and distributed long-distance monitoring applications. LE-PLC combines the compact structure of small PLC products with the abundant functional advantages of medium-sized PLC products, and can support up to 20 local IOs or long ...

In December 2020, the equipment of Sinopec Qingdao Petrochemical Co., Ltd. (hereinafter referred to as Qingdao Petrochemical) 5 million tons/year oil refining integration project, which was upgraded and transformed by Hollysys, was successfully operated, marking the successful completion of the DCS equipment upgrading task. This upgrade is a major development for Sinopec Industrial Holdings.

On April 7, 2021, the "2021 China Software Industry Annual Conference" hosted by the China Software Industry Association was held in Beijing. With years of technology accumulation and outstanding strength, Hollysys Group won the title of "The Most Influential Enterprise in China's Software Industry in 2020", as well as the "...