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slik
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樓主  發(fā)表于: 2022-07-04 08:42
通常我們連接Modbus-RTU通訊都是采用菊花鏈形式，也叫手握手，且其通訊規程里也明確講了，只支持總線(xiàn)形式，不支持星型和混合形式
但是在使用中發(fā)現經(jīng)常好幾個(gè)從站的線(xiàn)都是直接并接在一起的，這樣也能通信，這樣其實(shí)就是星型結構。我就不確定了，假如有十幾個(gè)從設備，是不是也可以直接并接在一起？這樣和使用485Hub有啥區別? 使用Hub就是端口與端口之間隔離，那么直接并接可以通信嗎？對于通信端口會(huì )有什么風(fēng)險嗎？

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