A Design Of PROFIBUS DP Slave Station Interface Card for Modbus Based Intelligent Field Network Instruments

Abstract

The Fieldbus is combination of technology of the modern computer and communication and the control. Recently in the field most intelligent devices are work on the Modbus field protocol. Now a days Profibus DP technique is widely applied in the field of industrial control. We focus on the design of profibus DP interface card through which the automation intelligent devices, which lack of profibus interfaces, can communicate and monitor with the profibus DP protocol instead of Modbus protocol. This interfacing card is based upon microprocessor chip and several interfacing integrated circuits. This paper shows data acquisition and sequence of the data transfer in the profibus DP interface card. As the result of sequence of experiments, we can read and write data on the field devices and accomplish the communication under the direction of related protocols.