Hollysys DCS - the connection method between thermocouple and DCS

1. High reliability Because DCS disperses the system control function on each computer, and the system structure adopts a fault-tolerant design, the failure of one computer will not lead to the loss of other functions of the system. In addition, due to the fact that the tasks undertaken by the various computers in the system are comparatively ...

1. Data backup When carrying out maintenance, we must cut off the power, data backup between power outages is an important link, for the data that needs to be archived for a long time, you can back up the historical trend data to the mobile hard disk, and then turn off the Windows-based operating system (Note...

The "2023 China Automation + Digital Industry Annual Conference", "The 19th CAIMRS and Digital Leaders Forum" and the "Annual Award Ceremony" were successfully held in Suzhou. The theme of this summit is "Powerful Digital Intelligence, Junfa New Industry", combined with post-epidemic recovery, digital intelligence, and new industrialization.

1. Correctness (low debugging cost) First of all, the PLC program must be able to work correctly to meet the requirements of the actual control process. This is the essence of the PLC program, and if you don't do that, nothing else makes sense. 2. Reliability (low maintenance cost) Not only to ...

(1) Computing function The computing functions of a simple PLC include logic operation, timing and counting functions; The operation functions of ordinary PLC also include data shift, comparison and other calculation functions; More complex arithmetic functions include algebraic operations, data transmission, etc.; There are also analog PIDs in large PLCs.

1. The physical structure of the interface 1. RS232 interface: One of the computer communication interfaces, usually RS-232 interface in 9 pin (DB-9) or 25 pin (DB-25) form, generally there will be two sets of RS-232 interfaces on personal computers, respectively called COM ...

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. Data backup When carrying out maintenance, we must cut off the power, data backup between power outages is an important link, for the data that needs to be archived for a long time, you can back up the historical trend data to the mobile hard disk, and then turn off the Windows-based operating system (Note...

Recently, Hollysys successfully signed a contract with Luxi Chemical Group Co., Ltd. (hereinafter referred to as Luxi Chemical) for a 1.2 million tons/year bisphenol A equipment project. The project is a key project in Shandong Province in 2021, which will not only greatly improve the competitiveness of Luxi Chemical polycarbonate in the industry, but also have a significant impact on China's phenol ...

On December 18, 2020, the "8th Member Congress and 2020 Zhejiang Enterprise Leaders Summit" hosted by Zhejiang Enterprise Confederation, Entrepreneur Association and Industrial Economics Federation (hereinafter referred to as the "Three Associations" of Zhejiang Province) was held in Hangzhou. At the conference, the top 100 in Zhejiang Province in 2020 were commended.

(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 ...

(1) Select the appropriate PLC model and I/O points, and select the special function module when there are special function requirements. (2) Familiar with the selected PLC programming instructions and compilation software. (3) Carry out soft component planning, including internal relays, holding relays, data registers, ...

1. PLCZ self-fault judgment 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; PLC output relay ...

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. Power supply: The power supply is used to convert the alternating current into the direct current required inside the PLC, and most of the PLCs are powered by switching regulated power supply. 2. Central processing unit: The central processing unit (CPU) is the control center of the PLC, and it is also the core component of the PLC.

1. Preliminary preparations Engineering configuration is operated at the engineer station, and before engineering configuration, it is necessary to have the necessary tools and information, specifically: Tools: refers to the hardware environment and software environment used in engineering configuration, usually refers to the ...

1、-10—10V。 When the voltage of -10V-10V is converted to F448-0BB8Hex (-3000-3000) at 6000 resolution; At 12000 resolution, it is converted to E890—1770Hex (-6000—6000). 2、0—10V。 At a voltage of 0-10V, at a resolution of 12000 ...

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 ...

1 Universal serial port module Based on the serial port communication module to realize the network connection, the network structure is shown in Figure 1, the form of computer link is adopted, the corresponding settings are carried out in the configuration software of the host computer, and the communication can be carried out with multiple PLCs without programming, and the FXlS of Mitsubishi ...

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 ...