SM203 HollySys Main Control Unit, Shanghai Sijian Intelligent Technology Co., Ltd. is engaged in technical development, technical consultation, technical transfer in the fields of intelligent technology, information technology, and automation technology, as well as the sales of electrical equipment, automation equipment, electronic products, communication products, and electromechanical products. Industrial automation products: PLC, DCS, sensors, frequency converters, encoders, relays, servo drives, soft starters, touch screens. Brands involved in the products include: Eurotherm, Schneider, Siemens, ABB, SICK, P+F, E+H, Yokogawa, Yamakawa, Mitsubishi, Emerson, Honeywell, FANUC, GE, Eaton Electrical, CT,
SM203 HollySys Main Control Unit , HollySys SM203 Main Control Functional Module HollySys SM203 Main Control Functional Module Chifeng and uses specialized tools for computer programming and monitoring. Input/Output Expansion Unit I/O expansion interface is used to connect expansion units that increase the number of external input/output terminals to the basic unit (i.e., the main unit). External Device Interface This interface can connect external devices such as programmers, printers, barcode scanners, etc., to the main unit to perform corresponding operations. Working Principle of PLC PLC operates by "sequential scanning, continuous looping." That is, during PLC operation, the CPU cyclically scans the program stored in the user memory according to the control requirements set by the user, following the instruction step sequence (or address number). If there is no jump instruction, it executes the user program sequentially from the first instruction until the program ends.
It then returns to the first instruction and starts a new round of scanning. During each scan, it also completes tasks such as sampling input signals and refreshing output status. A complete PLC scan cycle must go through three stages: input sampling, program execution, and output refresh.
This function is always "enabled." Changing the Motor's Rotation Direction Pressing this key can change the motor's rotation direction. The motor's reverse direction is indicated by a negative sign "-" or a blinking decimal point. Motor Jog Operation Pressing this key when the frequency converter has no output will start the motor. It will operate according to the preset jog operation. When the key is released.
The welcome screen or the main system screen of the controlled system can be used as the main screen, which can navigate to various sub-screens. Each sub-screen can return to the main screen in one step. If the controlled main system screen is used as the main screen, it should display some key parameters of the controlled system to provide a general overview of the entire controlled system on this screen.
Design of Control Screens
This type of screen is mainly used to control the start and stop of the controlled equipment and display internal parameters of the frequency converter. It can also include the setting of frequency converter parameters. This type of screen accounts for the majority of touch screen screens, and the specific number of screens is determined by the actual controlled equipment.