Development Of Discrete I/O Device Based On WorldFIP Fieldbus Technology

In recent years,electronic technology has developed quickly, and has changed the status oftechnology. In the industrial control area, FCS(Fieldbus Control System) has emerged as the timesrequire. Control functions spread to the field. WorldFIP is one of the fieldbus standards. Itconforms to the IEC physical layer standard. WorldFIP provides with dual-media redundancy andtime-critical transmission mechanism.In this paper, characteristics of the Discrete I/O device based on WorldFIP are presented. Thismodule connects WorldFIP fieldbus with traditional discrete I/O devices. Working principle and thesoftware/hardware development are discussed. The discrete input circuit is detailed and thoroughly.The module is based on ARM9 platform, which supports the soft PLC virtual machine. Theexecuting system of the soft PLC virtual machine explains and executes the Middle Code. During thedevelopment, I carry out some relevant debugging and tests.