描述
PLC在进行逻辑运算之前，必须对外部信号进行采样[8]，若要实现指令的功能，首先要设置外部I/O在梯形图中的地址，系统才能够对用户程序中所使用的I/O地址与单片机的引脚地址相匹配。本设计在I/O设置对话框底层设计了如表1所示的数据处理函数。
HP AGILENT E7495B BASE STATION SCREEN 10MHZ-2.7GHZ
HP Agilent 83446A Lightwave Clock/Data Receiver
HP Agilent 83447A Lightwave Trigger
One-day shipping available
HP Agilent 8903B Audio Analyzer, 20 Hz – 100 kHz W/OPT
Agilent/HP Plane Mirror Interferometer HP 10706A
Agilent/HP 8901B Modulation Analyzer 150kHz to 1300MHz
HP/Agilent 85024A 300 KHz – 3 GHz High Frequency Probe
Agilent / HP 6654A System DC Power Supply
HP/Agilent J2301B/001/200/220/221 Internet Advisor
w/ J2309B Ethernet/Token Ring Interface, 30 day warrant
Hewlett Packard / Agilent 4349A 4 Channel High Resistan
