描述
硬件：FX1N型、FX2N型PLC主机，配置1路简易型的FX1N-1DA-BD扩展模拟量输出板；或模拟量输入输出混合模块FX0N-3A；或两路输出的FX2N-2DA；或四路输出的FX2N-4DA模块等。
优点：PLC程序编制简单方便，调速曲线平滑连续、工作稳定。
缺点：在大规模生产线中，控制电缆较长，尤其是DA模块采用电压信号输出时，线路有较大的电压降，影响了系统的稳定性和可靠性。另外，从经济角度考虑，如控制8台变频器，需要2块FX2N-4DA模块，其造价是采用扩展存储器通讯控制的5～7倍
3 SPEED BICYCLE THE RELIANCE MADE IN ENGLAND 1954
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