描述
在用户程序执行过程中,只有输入点在I/O映象区内的状态和数据不会发生变化,而其他输出点和软设备在I/O映象区或系统RAM存储区内的状态和数据都有可能发生变化,而且排在上面的梯形图,其程序执行结果会对排在下面的凡是用到这些线圈或数据的梯形图起作用;相反,排在下面的梯形图,其被刷新的逻辑线圈的状态或数据只能到下一个扫描周期才能对排在其上面的程序起作用。
MICROSCAN MS-810 SCANNER FIS-0810-0014
MICROSCAN QUADRUS EZ BAR CODE SCANNER FIS-6700-0006G
MICROSCAN QUADRUS EZ FIS-6700-0003 BAR CODE SCANNER
MICROSCAN MODEL FIS-0850-0001 SCANNER MODULE LNC
MICROSCAN MS-7080 Fixed Mount Scanner Lot of 2
Microscan MS-810 FS-0810-0009 Barcode MS810 w/ base arm
Microscan FIS-6300-0003G Quadrus Mini Barcode Scanner
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Microscan FIS-6700 Barcode Scanner Reader Quadrus
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Microscan MS-3 Barcode Scanner Scan Head IB-131 Adapter
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Microscan MS-3 Barcode Scanner Scan Head IB-131 Adapter
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MICROSCAN MS-710 BAR CODE SCANNER NIB
USED MICROSCAN QUADRUS IMAGER MINI FIS-6300-0002G
Microscan MS710 Serial scanner, power supply,cable & SW
Expedited shipping available
MICROSCAN QUADRUS EZ BAR CODE SCANNER FIS-6700-0006G