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。
RELIANCE 0-51829-2 LINEAR VOLTAGE TIMING MODULE NIB
Expedited shipping available
RELIANCE ELEC. 0-54349-2 SEQUENCE CARD 0543492 NIB FS
Expedited shipping available
RELIANCE ELECTRIC 0-51862-1 USAB CARD 0518621 New
Reliance/ Baldor 2hp 3Phase AC Motor New
Reliance Electric 415710-13A Meter Calibration PCB
Reliance Electric 415710-13A Meter Calibration PCB
Reliance Electric 415710-13A Meter Calibration PCB
Reeves/Reliance Adjustable Speed Motor Drive 2HP 3Phase
ROCKWELL/RELIANCE ELECTRIC A/C MOTOR, WITH DISK BRAKE
Reliance Electric P18G4901EC 5HP 3475RPM AC Motor
