It is introduced in this paper that a method to improve the real-time protocol based on Ethernet, referring to Profibus DP field-bus protocol.
对通讯协议以及以太网实时协议改进的研究是对工业自动化系统底层次融合问题的一种探讨。
HART field-bus protocol is used in output of system pressure or differential pressure transmitter, digital signals is transmitted with MODBUS via RS485.
系统压力或差压变送器信号输出采用HART现场总线协议，数字信号传输通过RS485进行MODBUS通讯。
A multiple protocol converter developed by using protocol conversion principle is introduced finally, it supports industrial Ethernet and multiple field bus technology conversion.
最后介绍了采用协议转换原理研究开发的一种支持工业以太网与多种现场总线技术转换的多协议转换器。
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