After 1850 set up offices in London and 1855 in St. Petersburg, Siemens quickly set up offices in other parts of the world. Such as Brussels (187 1), Paris and The Hague (1879), Vienna and Warsaw (1879), Stockholm and Turin (1880), new york (1889).
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Siemens Inverter is a well-known inverter brand developed, produced and sold by Siemens Company in Germany, which is mainly used for speed control and regulation of three-phase AC asynchronous motors. With its stable performance, rich combined functions, high-performance vector control technology, low speed and large torque output, good dynamic characteristics, super overload capacity, innovative BiCo (internal function interconnection) function and unparalleled flexibility, it occupies an important position in the inverter market.
Siemens classifies according to the control scale:
It can be divided into mainframe, medium-sized computer and minicomputer.
Minicomputer: The control point of minicomputer is generally less than 256 points, which is suitable for single machine control or small system control.
Siemens minicomputer has S7-200: processing speed is 0.8~ 1.2ms, memory is 2k, digital quantity is 248 points, and analog quantity is 35 channels.
Medium-sized machine: The control point of medium-sized machine is generally less than 2048 points, which can be used for direct control of equipment and monitoring of multiple lower-level programmable controllers. It is suitable for the control of medium or large control systems.
Siemens medium-sized computers include S7-300: processing speed 0.8~ 1.2ms, memory 2k, digital quantity 1024 points, analog quantity 128 channels, network PROFIBU, industrial Ethernet and MPI.
Mainframe: The control points of mainframes are generally greater than 2048 points, which can not only perform complex arithmetic operations, but also perform complex matrix operations. It can be used not only for direct control of equipment, but also for monitoring multiple lower-level programmable controllers.
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