施耐德140NOE77101
施耐德140NOE77101
可以PLC對(duì)程序執(zhí)行有限次數(shù)掃描（從1次掃描到65,535次掃描），通過PLC運(yùn)行的掃描次數(shù)，可以監(jiān)控程序過程變量的改變。*次掃描時(shí)，SM0.1數(shù)值為1。
1. 執(zhí)行單次掃描
“單次掃描”使PLC從STOP轉(zhuǎn)變成RUN，執(zhí)行單次掃描，然后再轉(zhuǎn)回STOP，因此與*次相關(guān)的狀態(tài)信息不會(huì)消失。操作步驟如下：
（1）PLC必須位于STOP（停止）模式。如果不在STOP（停止）模式，將PLC轉(zhuǎn)換成停止模式。
（2）用菜單“調(diào)試”→ “*掃描”。
圖1 “執(zhí)行掃描”對(duì)話框
2. 執(zhí)行多次掃描
步驟如下：
（1）PLC須位于STOP（停止）模式。如果在STOP（停止）模式，將PLC轉(zhuǎn)換成停止模式。
（2）用菜單“調(diào)試” →“ 多次掃描” →出現(xiàn)“執(zhí)行掃描”對(duì)話框。如圖3-23所示。
（3）輸入所需的掃描次數(shù)數(shù)值，單擊“確定”。
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IFM ELECTRIC 10-36VDC 4-PIN PHOTOELECTRIC SENSOR 0G5098 0GH-FPKG/V4A/US
TURCK 10-65VDC 4 PIN PROXIMITY SENSOR Bi20U-Q50-VP4X2?-H1141
PEPPERL + FUCHS * SENSOR KIT * 82G63-E4
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IFM ELECTRIC 10-36VDC 4-PIN PHOTOELECTRIC SENSOR 0F5027 0FB-FPKG/US
ALLEN BRADLEY 10-40VDC 4VA PHOTOSWITCH 42GRU-9000-QD SER. A
TURCK Uprox 20-250VAC / 10-300VDC PROXIMITY SENSOR Bi20U-CA40-ADZ3?0X2-B1131
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ATC 10-30VDC CONVERGENT BEAM LASER SENSOR 7706AD04N3BQP
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NAMCO 20-230VAC/DC 3,000 PSI CYLINDER PROXIMITY SWITCH EE230-10420
OMRON SAFETY LIGHT CURTAIN F3S-A162P-L WITH F3S-A482P-L
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CTC CABLE CB102-B2N-100-Z
HONEYWELL MICROSWITCH 973AB3XM-A7T-L NIB
OMRON SENSOR 2A 24V D4 E-1A23L2N
PCB PIEZOTRONICS 100 MV/G 2-PIN VIBRATION CALIBRATION ACCELEROMETER, U328B07
