The Test Bench Of Fieldbus Intelligent Instrument Based On SHCAN

Fieldbus is connected smart devices and automation systems bidirectional transmission network. Fieldbus involving almost all industrial areas, due to meet the needs of industrial control systems for distributed, networked, intelligent direction of development, it has become a popular global industrial automation technology. In the three-tier structure of the system, fieldbus intelligent instrument is based on the core components. Because of its factors and the influence of ambient intelligent instrument, its performance may produce changes in order to ensure the quality, the use of various instruments, must regularly be detected by monitoring equipment appropriate accuracy.Theme of this paper is based on the control system is widely used-SHCAN2000fieldbus control system, designed a system dedicated to the monitoring and control of various series of smart meter test bench. The test rig set automatic calibration, aging testing recording and automatic alarm functions in one. The SHCAN2000system has been very mature, it has developed into a broad application of control systems, with a variety of products and a variety of instruments, test bench design of the project is for SHCAN2000various series of instruments in the input/output analog and switch, the design of a universal instrument can detect systems.The test rig is mainly used fieldbus smart meter data transmission, data transmission between computers; using RS232serial port and CAN protocol conversion controller to complete the PC configuration downloaded to the next machine, the next crew to the host modem upload; test platform also uses real-time processing technology and bus communication functions of the computer, the final completion of the detection of SHCAN2000series instrument. Also designed a method for determining the location of the function fails, you can find exactly substandard equipment, also can automatically identify the type of error is displayed on the computer monitor screen or alarm and operating personnel. The accuracy of the test bench set is also very flexible and can be set according to the user’s own needs in order to meet different needs.