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本文介绍MODBUS通讯协议与综合保护继电器的通讯,并结合美国AB公司的PLC与通用GE公司的SR469电机综合保护继电器之间基于协议的应用实例,阐述协议的程序方法。
This article describes the MODBUS communication protocol and integrated protection relay communication, combined with the United States AB PLC and GE GE SR469 motor protection relay based on the agreement between the application examples, elaborate protocol procedures.