Description
首先它以扫描的方式接收现场各输入装置的状态和数据，并分别存入I/O映象区，然后从用户程序存储器中逐条读取用户程序，经过命令解释后按指令的规定执行逻辑或算数运算的结果送入I/O映象区或数据寄存器内。等所有的用户程序执行完毕之后
Cisco 15454-MR-L1-30.3 MULTI-RATE TXP 100M-2.5G 100G
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Juniper PE-1GE-SFP-QPP w/ SFP GBIC IQ PIC M7i M10i
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