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All brands of PLC  have self-diagnostic functions. The skill of PLC maintenance lies in that when the PLC is abnormal, its self-diagnosis function should be fully utilized to analyze the cause of the fault. For example, if an abnormality occurs in the PLC, first check whether the power supply voltage, the screws of the PLC […]

Inspection methods for oscilloscope faults often include visual inspection, circuit inspection, and comparison inspection. The visual inspection method is to observe whether the oscilloscope has a broken wire, an imaginary weld, a poor contact, whether the components are burnt with buzzing, whether the solder joints are ignited, whether they have scorched odors, smoke, etc., by […]

The sensor converts the physical quantity to be measured into an electrical signal and processes this electrical signal so that it can be easily transmitted and processed. In addition, the sensor can detect the presence of a target (binary sensor). Or the sensor outputs a measurement (analog/digital sensor). sensor A sensor consists of three main […]

The crystal diode is actually a P-N junction, which has unidirectional conductivity and can make the alternating current into direct current. This effect is called rectification. The so-called unidirectional conductivity is that the diode is turned on by the forward voltage under the action of the forward voltage, and the diode is not turned on […]

The common sense of human-machine interface is the first knowledge for beginners. The product consists of hardware and software. The hardware part includes processor, display unit, input unit, communication interface, data storage unit, etc. HMI software is generally divided into two parts. It is two parts, namely the system software running in the HMI hardware […]

1: When repairing the micro-electric push rod, pay attention to the use of sharp utensils for disassembly and assembly, because the micro-electric push rod has many sophisticated electronic components inside, which can easily cause damage. 2: Micro-electric push rods must be removed after the circuit module is removed in the repair process, and the electronic […]