说明：  ModBus通讯协议分为RTU协议和ASCII协议，我公司的多种仪表都采用ModBus RTU通讯协议，如：YD2000智能电力监测仪、巡检表、数显表、光柱数显表等。下面就ModBus RTU协议简要介绍如下： 一、通讯协议
(ModBus RTU communication protocol into ASCII protocols and agreements, the company used a variety of instruments ModBus RTU communication protocol, such as : YD2000 intelligent power monitoring device, Inspection Table, several distinct forms Bargraph few significant and so on. Now, ModBus RTU briefed the agreement are as follows : a communications agreement)