Ramadan is the ninth month of the Islamic calendar, and based on lunar phase observations, it is expected to start from March 23 to April 21 in 2023. In this auspicious month of Muslim reunion and prayer, between sunrise and sunset every day, they will purify their character, regulate themselves, and enhance restraint and self-discipline through fasting forms such as "not eating...
Qingming Festival (Tomb Sweeping Festival) is one of the traditional festivals in China, usually between the 4th and 6th of April each year, and is an important day for paying respect to ancestors and for prudent thinking and respect for relatives. On this day, people visit the graves of their ancestors to pay their respects, offer flowers, offer incense and sweep their tombs to express their reme...
A power plant, 2×300MW coal-fired units The thermal system is a unit system . Each unit is equipped with a centralized control building, which adopts the centralized control mode of machine , furnace and electric unit . The elevation of the unit control room is 12.6m, which is consistent with the elevation of the operation floor . DCS adopts WDPF-Ⅱ, and the I/O points designed for eac...
Reducing information round trips and reducing system cabling Reducing information round trips and reducing system cabling are sometimes at odds with each other. At this time, the principle of saving investment should still be used as the choice. If the response time of the selected system allows, a cable-saving solution should be selected. If the response time of the selected system is rela...
The basis of the FCS system is a digital intelligent field device. The digital intelligent field device is the hardware support and foundation of the FCS system. The reason is very simple. The FCS system implements the two-way digital communication field bus signal system between the automatic control device and the field device. If the field device does not follow the unified ...
Difference of DCS, PLC and FCS in system 1. Main points of difference (1) How much I/O information the system can handle. (2) How much control-related control loop information the system can handle. (3) How many users and devices (CRT, control station, etc.) can be adapted. (4) How thoroughly the integrity of the transmitted data is checked. (5) What is the maximum allowable length of the d...
The difference between the three major control systems of DCS, PLC and FCS We already know that FCS is developed from DCS (Siemens 6ES7322-1HH01-0AA0 SIMATIC S7-300 Digital Output Module) and PLC(Allen Bradley 1785-L60B Enhanced Ethernet Controller). FCS (B&R X20CS1070 Communication Module)not only has the characteristics of DCS and PLC, but also takes a revolutionary st...
Power supply to power the programmable controller In the power system, using 220V DC power supply (battery) to power the programmable controller can significantly reduce the interference from the AC power supply, and can also ensure the normal operation of the programmable controller when the AC power supply disappears. In the power input terminal of some programmable cont...
Power supply`s running in PLC module The low-pass filter can absorb most of the " burrs " of the power supply .L1 and L2 in the figure are used to suppress high-frequency differential mode voltage . L1 and L2 are reversely wound on the same magnetic ring with equal length wires , The magnetic flux generated by the power frequency current in the magnetic ring cancels each other, and the m...