描述
S7-300 PLC模拟量模块可通过变换信号类型卡支持各种类型信号。当改造老生产工艺线时,不可避免地会遇到多类信号。因此,设计时最好不把几种信号接到同一模块;同时必须先组态好模块,再接信号线,检查无误后送电。此外,应避免两线制与四线制信号、电流与电压信号的混接,以免烧坏模块。
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