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Soft starters and frequency converters are two completely different products. Inverter is used in the need for speed control, the output will not only change the voltage but also change the frequency; soft starter is actually a regulator, which is used when the motor starts, the output changes only the voltage is not Change the […]

Siemens S7 series PLC small size, fast, standardized, with network communication capabilities, more powerful, more reliable. S7 series PLC products can be divided into micro-PLC (such as S7-200), small-scale performance requirements of PLC (such as S7-300), and high performance requirements of the PLC (such as S7-400). 1. SIMATICS7-200PLC S7-200PLC is ultra-small PLC, which is suitable […]

First, the touch screen principle   The basic principle of the touch screen is that when the touch screen installed on the front of the display is touched with a finger or other object, the touched position (in coordinate form) is detected by the touch screen controller and sent to the CPU through an interface […]

(1) Fault One: Touch Offset Phenomenon 1: The position touched by the finger does not coincide with the mouse arrow. Cause 1: After installing the driver, the center of the bull’s-eye is not vertically touched when correcting the position. Solution 1: Recalibrate the position. Phenomenon 2: The touch in some areas is accurate and the […]

1. No response from touch screen for the first time after installing driver Symptoms: A touch screen, the first time you start the touch screen after installing the driver will not respond. [Touch Screen Maintenance Technology Analysis and Processing] First of all, confirm whether the touch screen line connection is correct. If it is not […]

The SR area (231~255) is divided into two parts 232~251: often used in units of channels 232~249 can be used as auxiliary auxiliary relay when no specified function is specified in the table 250, 251 can only be used according to the functions in the table, it can not be used for other purposes. 252 […]