描述
在程序执行的过程中如果使用立即I/O指令则可以直接存取I/O点。即使用I/O指令的话,输入过程影像寄存器的值不会被更新,程序直接从I/O模块取值,输出过程影像寄存器
当扫描用户程序结束后,可编程逻辑控制器就进入输出刷新阶段。在此期间,CPU按照I/O映象区内对应的状态和数据刷新所有的输出锁存电路,再经输出电路驱动相应的外设。这时,才是可编程逻辑控制器的真正输出。
MICROSCAN MS-710 BarCode Scanner Microplate Scanner
One-day shipping available
Microscan Quadrus Mini Barcode Scanner System No Power
Microscan barcode scanner UPC laser MS-810 FIS-0810-004
MICROSCAN QUADRUS MINI BAR CODE SCANNER FIS-6300-0003G
Microscan MS-810 FS-0810-0009 Barcode Scanner MS810
Microscan: 99-420001-01, M10076, IB-105 w/AC Adapter
Microscan Mdl. FIS-0710-0013 Scanner, MS-710 Series
MICROSCAN MS-610 Rotary Motor Mount SMC MSQB20AX-X29
One-day shipping available
MICROSCAN QUADRUS EZ SCANNER M/6 152.4mm FIS-6700-0006
One-day shipping available
NICE MICROSCAN BAR CODE SCANNER MODEL FIS-0610-0045
Microscan MS-615 Infrared Laser Scanner
Microscan MS-710 FIS-0710-0023 Scanner
MICROSCAN MS-1200 Barcode Scanner Lot of 4
Micros Systems PC ISN/AT 400378-001 Microscan ISA 1995