Hollysys safety barriers won excellent products

1. Rich networking and interface functions, easy to deploy It supports 5G/4G/3G/WIFI/Ethernet, WAN/optical fiber and other network access modes, network port/serial port/IO port/CAN port and other equipment access, and supports LoRa wireless transmission, disconnection reconnection and multi-network mutual backup function. 2. Abundant ...

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 ...

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 ...

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 ...

(1) Overhaul projects DCS system overhaul is carried out in the random group of main equipment overhaul, and the overhaul project includes the following: 1) Conduct a comprehensive inspection of the control equipment and make a record. 2) Copy the configuration of all modules, and verify the marks and addresses of the modules. 3) Qing ...

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 ...

1. Relay output circuit This type of output circuit form can be either DC or AC. The output circuit form of PLC relay allows the load to be generally below AC250V/50V, the load current can reach 2A, and the capacity can reach 80-100VA (voltage × current), so ...

(1) Development in the direction of integration: the development of standardized data communication links and communication networks, and the formation of a large system of various single (multi) loop regulators, PLCs, industrial PCs, NCs and other industrial control equipment to meet the requirements of factory automation and adapt to the general trend of openness. (2) To the intelligent ...

In order to further strengthen the comprehensive cooperation with Shaanxi Traffic Control Group, on August 11, 2022, Xu Yue, Chairman and Co-President of Hollysys Group, visited Zhang Wenqi, Secretary of the Party Committee and Chairman of Shaanxi Traffic Control Group, and the two sides conducted in-depth exchanges and cooperation on topics such as business ecology and smart highways.

Merit: 1. High reliability: The DCS system has multiple redundancy, backup and recovery mechanisms, which can ensure the high reliability and stability of the system. 2. Sensitivity: The DCS system can be customized according to different industrial processes to meet different control requirements. 3. Efficiency: D...

When the PLC understands the interrupt function, it needs to understand the PLC's operating cycle or scan cycle. It is necessary to talk about the process of PLC sequential control loop execution, which is a prerequisite for understanding interruptions and must be mastered. It is divided into three parts, input processing, program processing, and output processing. 1、 ...

1. Open empty A master air switch that is the power control for the entire cabinet. 2. Power supply A 24VDC switching power supply. 3、PLC This should be chosen according to the needs of the project. If the scale of the project is small, the integrated PLC can be used directly; If the item ...

Simplicity Make the PLC program as simple as possible. Simplicity means using a standardized procedural framework as much as possible and using simple instructions as much as possible. If you want the program to be simple, in a big way, you should optimize the program structure, simplify the program with process control instructions, and ...

On November 13, 2022, Zhong'an United Coal Chemical Branch came with exciting news that the 20,000 tons/year butene-1 plant produced qualified butene-1 products at 22 o'clock on the same day, and the one-time start-up was successful. The control system of the device adopts the innovative technology product "OCS Industrial Optical Bus Control ...

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 ...

1. Circuit isolation The isolation of analog circuits is more complex, mainly depends on the accuracy requirements of the transmission channel, the higher the accuracy requirements, the higher the cost of the channel; However, when the performance requirements rise to the main contradiction, the isolation components should be selected based on performance, and the ...

1. Grounding problems The grounding requirements of the PLC system are relatively strict, and it is best to have an independent dedicated grounding system, and it should also be noted that other equipment related to PLC should also be reliably grounded. When multiple circuit grounding points are connected together, unexpected currents can be generated, resulting in logic errors or ...

Recently, Hangzhou Hollysys Automation Co., Ltd. successfully signed the first 100 billion cubic meters of gas field project in Bohai Bay (1) - CNOOC Tianjin Branch Bozhong 19-6 condensate gas field phase I development project (hereinafter referred to as: Bozhong 19-6 project), and will provide PCS (DCS), ESD, FGS, ...

To put it simply, DCS is mainly used for process automation, PLC is mainly used for factory automation (production lines), and SCADA is mainly for wide-area needs, such as oil fields and pipelines that stretch for thousands of miles. If from the point of view of computers and networks, they are unified, and the reason for the difference is mainly in ...

PLC is essentially a kind of computer dedicated to industrial control, and its hardware structure is basically the same as that of a microcomputer, and its basic composition is as follows: 1. Power supply The power supply of the PLC plays a very important role in the whole system. If you don't have a good, reliable power system that is ...