描述
逻辑功能图是一种由逻辑功能符号组成的功能块来表达命令的图形语言，这种编程语言基本上沿用了半导体逻辑电路的逻辑方块图。对每一种功能都使用一个运算方块，其运算功能由方块内的符号确定。对于熟悉逻辑电路和具有逻辑代数基础的人员来说，使用非常方便。
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