ABB INICT13A Symphony Time Keeper Master Module Industrial Drive

HONG KONG SAUL ELECTRICAL LIMITED.

Manager: Jinny

Tel: + 86-15359273791 (WhatsApp)

Wechat: + 86-15359273791

The company is mainly engaged in the accessories of DCS system and PLC system. Main products: Bentley Bentley, Invensys Invensys, Woodward Woodward, Foxboro, Foxboro, Westinghouse, Ryan Ryan Ryan, Schneider Modicon, Schneider Modicon, abb, AB, Siemens Siemens, Motorola, GE Fanuc Rockwell, Allen bradleyge FANUC, Yaskawa Yaskawa, Bosch Rexroth, Bosch Rexroth, aCso, Yokogawa, DCS system accessories, robot system accessories and large servo system spare parts of Rexroth Rexroth and other major brands.

With the wide application of DCS in thermal power plants, its dominant position in the safe and stable operation of units is becoming more and more prominent. Due to the reliability of software and hardware of DCS equipment, the perfection and rationality of control logic, the maintenance and overhaul level of thermal personnel and many other factors, unit false tripping events still occur from time to time. Therefore, effective technical management and correct overhaul and maintenance to maintain the stable and reliable operation of thermal power unit DCs has increasingly become the focus of daily management and maintenance of thermal workers. Therefore, combined with the above case analysis, the author puts forward some preventive measures to improve the reliability of the control system for reference in maintenance: ● implement whole process management for DCS equipment and overhaul and maintenance, find defects as soon as possible and deal with them in time. Improve the DCS self diagnosis and fault alarm functions. The real-time monitoring of DCS operation status should not only monitor the state of the main controller, but also monitor the state of the main controller network. ● formulate a reasonable regular maintenance system, specify the contents, methods and cycles of inspection and maintenance in detail, analyze the inspection results and take targeted preventive measures. Since the trial implementation of this system, Zhenhai Power Plant has effectively controlled the occurrence of DCS faults. ● formulate DCS emergency plan and typical fault handling scheme to prevent DCS faults caused by improper maintenance. ● select high-quality spare parts, such as cooling fan and DP plug of main controller, and replace vulnerable parts regularly. ● remotely monitor the ambient temperature of the electronic room, access the DCS display, and master the change of the ambient temperature of the electronic room in real time. The electronic room with central air conditioner shall also pay attention to the control of humidity. If necessary, an independent air conditioner or dehumidification device shall be installed. ● check the appearance of module circuit board during maintenance, which can play a good preventive effect.

Main application fields of PLC

ABB INICT13A

1. Industrial process control

In the process of industrial production, there are some continuously changing quantities (i.e. analog quantities) such as temperature, pressure, flow, liquid level and speed. PLC uses corresponding a / D and D / a conversion modules and various control algorithm programs to process analog quantities and complete closed-loop control. PID regulation is a regulation method used more in general closed-loop control system. Process control is widely used in metallurgy, chemical industry, heat treatment, boiler control and so on.

2.Motion control

PLC can be used to control circular motion or linear motion. Generally, special motion control modules are used, such as single axis or multi axis position control modules that can drive stepping motors or servo motors. They are widely used in various machinery, machine tools, robots, elevators and other occasions.

3.Data processing

PLC has the functions of mathematical operation (including matrix operation, function operation and logic operation), data transmission, data conversion, sorting, table lookup, bit operation, etc., and can complete data acquisition, analysis and processing. Data processing is generally used in some large-scale control systems such as papermaking, metallurgy and food industry.

4.Communication and networking

PLC communication includes communication between PLC and communication between PLC and other intelligent equipment. With the development of factory automation network, PLC now has communication interface, which is very convenient

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ABB INICT13A