摘  要：本文以基于MODBUS通信協議的三相電量采集模塊為研究對象，首先介紹了通用的MODBUS通信協議，然后以實例介紹了三菱L系列PLC同電量采集模塊之間的RS485通信解決方案。 關鍵詞：三菱L系列PLC   電量采集模塊   MODBUS Abstract: A three-phase power acquisition module based on MODBUS protocol is chosen as a research object, this paper first introduces the general MODBUS communication protocol, and then introduced an example that to realize the communication with MITSUBISHI L serie[登陸后可查看全文]