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First, the following some of the system to pay special attention to anti-electromagnetic interference: 1, the microcontroller clock frequency is particularly high, the bus cycle is particularly fast system. 2, the system contains high-power, high current drive circuit, such as the spark of the relay, high current switch. 3, with weak analog signal circuit and […]

As long as the factory is more or less will use the touch screen, touch screen failure is more, the touch screen repair has become a factory problem, no way to operate can not work, today I touch screen repair case here for everyone ,for reference. First, the Siemens touch screen repair TP270 Symptoms: power […]

1, the motor connected to the power start, the motor does not turn but a buzz sound may be: ① due to the power of the problem, resulting in single-phase operation; ② motor overload capacity; ③ drag mechanical stuck; ④ winding motor rotor circuit open into a broken line; ⑤ stator head end of the […]

When updating the operating system, Siemens PLC should always be updated with the latest version available for the relevant order number. Previous versions of the operating system were available as backups to allow the user to revert to the original version, although so far no such necessity has been found. The latest version of the […]

This article mainly introduces some common fault diagnosis and repair methods of the frequency converter, and briefly describes the causes and prevention measures of the fault. Need to understand the inverter repair knowledge, you can start from the following five aspects. First, understand the difference between analog and digital The difference between analog and digital […]

Should follow the following principles and steps, in an orderly manner. Principle one, look at the amount Use tools: multimeter, magnifying glass When holding a circuit board to be repaired, good habits should first of all be dealt with visually and, if necessary, with a magnifying glass to see what? Mainly look: 1, whether there […]