In 1990, the German some famous numerical control systems and the servosystem manufacturer, like SIEMENS, INDRAMAT, BOSCH, AMK, as well as some important scientific research institutions initiated have established the SERCOS association, the goal are together must establish unified CNC in Germany (Computer Numerical Control, computer numerical control) between the unit and the numeral servo unit interface standard, thus guaranteed follows the related equipment which this standard developed to have the good interchangeability. In 1992, this standard is proposed for German and international standard DIN/IEC 44. In 1995, this standard is authorized for international standard IEC 61,491. From this time on, the SERCOS agreement widely accepts by European many countries and American and Japan's numerical control system and the servosystem manufacturer, and starts to develop and to produce conforms to this agreement product. This agreement application into since a at the end of 1990s servos technology important development direction, its application domain also has expanded from the initial numerical control engine bed to each kind of numerical control machinery.

The numeral servo unit appearance is in the numerical control technology history an important milestone. Uses the numeral servo unit, causes all instructions value and the actual value all can complete processing in a micro controller, not only can realize the tradition to turn the matrix ring and the speed ring control, moreover can become a ghost in the extremely short time inserts makes up, realizes the snap ring control. Compares with the use simulation servo unit, uses the numeral servo unit to be able to obtain the higher processing precision and the processing speed, also the control hardware is simple, the system complexity and the cost all greatly reduce.

Is following the numeral servo unit development, how realizes between the control unit and the numeral servo unit data communication becomes a key question, namely must provides the appropriate digital interface for the control unit and the numeral servo unit. The practice proved that, uses the SERCOS connection connection control unit and the numeral servo unit, the realization serial real-time data communication, has following merit: Between simplification control unit and servo unit wiring; The simplification control hardware, causes the debugging to be more convenient; May transmit data and so on parameter, instruction and condition; The data transmission has not drifted, may realize the remote control.

Specially uses in as one kind between the control unit and the numeral servo unit serial real-time data communication connection, SERCOS is multitudinously occupied by its fine performance by the world the dominant position the numerical control system manufacturer and the engine bed produces the factory to select. More more importantly, the international electrician committee (International Electro□□technical Commission) authorized it in 1995 for international standard IEC 61,491, English full title was: Electrical equipment to industrial machines□□Serial data link for real□□time communication between controls and drives, has built the solid foundation for it in the world scope promotion and the application.

The national industry mechanical electrical system standardization technical committee has formulated the national standard which 61,491 corresponds with SERCOS international standard IEC: "GB/T 18473-2001 Industry Mechanical Electrical equipment Control And Drive Real-time Serial Communication Data Link", issued by the country quality surveillance examination quarantine bureau to October 24, 2001, on April 1, 2002 starts to carry out. Before this, the SERCOS main line has been applied to the practice, now the whole world has more than 70 companies to be able to provide has the SERCOS connection the digital product, overseas production each kind of printer, food packaging machine, assemble the robot, the semiconductor processing equipment, the spinning and weaving machine and other has the special use in the machine not to lack the SERCOS main line the application. At present, SERCOS is the only movement main line standard, surpasses 120 controllers and the actuation merchant support in the global scope.

The SERCOS connection physics level by the optical fiber cable constitution, the digital communication way (non- signal drifting question, instruction and feedback data precision may reach 32-bit), the communication speed is 4 M bit/sec, will be very quick can achieve 6 Mbit/sec, because has used optics medium, will not be able to receive any electrical system the disturbance. The optical fiber connection has substituted in the multiple spindle control system several hundred wiring, thus effectively enhances the project speed, reduces the project debugging and the maintenance time. The low cost plastic optical fiber may support the most length is the 130ft point-to-point distance, most greatly moves in a circle the distance is 32,800ft. (Sees also SERCOS analysis situs chart).

May use in the high performance application based on the SERCOS system, may connect reaches 32 servo drivers and a movement controller. (The SERCOS standard supports 254 drivers and the I/O stand). The SERCOS correspondence agreement support by the movement controller transmission actuation parameter, may realize the automatic establishment connection, the accuracy control and the intelligent diagnosis function to the servo driver. Because the SERCOS agreement characteristic had decided it relative is lower to the network correspondence band width demand, therefore may guarantee all connections are smaller than 1 millisecond in SERCOS network movement controller and the servo driver its correspondence cycle. Uses SERCOS the user to be able to discover that, compares to the traditional simulation technology, SERCOS causes their machinery movement fast, moreover the precision is higher.

TRIO Corporation does is one of SERCOS initiators, continuously devotes to the SERCOS product development and the development. In in the TRIO Corporation's movement controller series, promotes SERCOS to control the sub- board, its may peg graft in MC206 and MC224 and so on in a series of products, may cause the user according to need to support the SERCOS connection with any factory the servo driver direct connection use, breaks technical barrier which forms by some big companies, moreover coordinates the TRIO high performance movement controller the control function, can complete the present overwhelming majority the complex application. At the same time, the user also may while use the SERCOS communication control mode, again uses the traditional way control servo movement, thus achieves the two the organic fusion.

At present China's SERCOS high end market is monopolized by the European and American two everybody enterprises, profits for Chinese more enterprises from this kind of advanced SERCOS main line technology, TRIO Corporation in the low power aspect and Hitachi, An Chuan, the ohm dragon servo driver match, high efficiency and the German kopeck company servo driver match, the constitution price compared to the extremely superior movement control system. The systems control parameter establishment simple has been bright, the programming way uses the extremely friendly direct-viewing Chinese user contact surface.

The global SERCOS association's highly takes SERCOS to coordinate the TRIO movement controller in each domain application, unfolded the duration in IAC2006 SERCOS whole world association president Mr. Peter Lutz once to arrive personally the TRIO booth to instruct

During IAC2006, TRIO Corporation wins "the industrial design big prize" in US MC206 and for settles the SERCOS module through it which the Sichuan company develops, the Japanese Hitachi servo, settles the Sichuan servo and the German kopeck servo perfect unifies in together. In the following chart the floor shows:

SERCOS was the digital servo network shop on a strip width extravagant main road, was allowed to foresee, in not the far future, will have the SERCOS connection the servosystem to be able to enter each and the servo application related domain. Person of great strength happy Indramat Corporation in 1999 therefore occupies the North America servo to actuate the market 10.5% shares, to be situated first, on the one hand is this company in the application project, sales, the service and user support aspect strengthening, another primary factor pledges opening structure - SERCOS. At present China is being at the stage which the industry promotes, must want to enhance the mechanical and electrical product in the international market core competitive ability, uses each advanced technology is the inevitable choice, TRIO Corporation hopes take the high quality product and the technology serves as the user communities, helps the Chinese user as soon as to unfold the elegant demeanour in the world-class stage.