软件配置存储在 CPU 的非易失 RAM 中。储存配置后使得自动配置无效。因 此 PLC 后来启动时将不再重写配置。 然而，实际上从编程器中清除 CPU 中的配置会产生一个新的自动配置。在这 种情况下，自动配置功能将激活直至从编程器重新下装配置。
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