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厦门莫格电气自动化有限公司
厦门莫格电气自动化有限公司
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3BSE025255R1
1、高效率等级降低了能耗，直接使用户节约成本
2、较高的防护等级（IP55），保证客户使用安全可靠
3、较高的性价比。
3BSE025255R1
3BSE025255R1
：祖巧丽
：
当PLC投入运行后，其工作过程一般分为三个阶段，即输入采样、用户程序执行和输出刷新三个阶段。完成上述三个阶段称作一个扫描周期。在整个运行期间，PLC的CPU以一定的扫描速度重复执行上述三个阶段。
(一) 输入采样阶段
在输入采样阶段，PLC以扫描方式依次地读入所有输入状态和数据，并将它们存入I/O映象区中的相应得单元内。输入采样结束后，转入用户程序执行和输出刷新阶段。在这两个阶段中，即使输入状态和数据发生变化，I/O映象区中的相应单元的状态和数据也不会改变。因此，如果输入是脉冲信号，则该脉冲信号的宽度必须大于一个扫描周期，才能保证在任何情况下，该输入均能被读入。
(二) 用户程序执行阶段
在用户程序执行阶段，PLC总是按由上而下的顺序依次地扫描用户程序(梯形图)。在扫描每一条梯形图时，又总是先扫描梯形图左边的由各触点构成的控制线路，并按先左后右、先上后下的顺序对由触点构成的控制线路进行逻辑运算，然后根据逻辑运算的结果，刷新该逻辑线圈在系统RAM存储区中对应位的状态；或者刷新该输出线圈在I/O映象区中对应位的状态；或者确定是否要执行该梯形图所规定的特殊功能指令。
即，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。
Newly listedESKOWATER FLOW METER VDK-3MG-DN
FORCE CONTROL 502-M2-MS-03 SERVICE PARTS KIT, NEW IN BAG
INGERSOLL-RAND / SOCATT PAD 77A-M825-7 *NEW*
BRADLEY PLASTIC EYEWASH BOWL DUST COVER S45-1964 *NEW*
BANNER 3FT RIGHT ANGLE SENSING END FIBER OPTIC CABLE ITA13S *NEW*
COSTGUARD 5 MICRON WATER FILTER CARTRIDGE CG5-20 *NEW*
WIDIA 1/4 BOT TAP 14024 *NEW*
WIDELL 1 7/8-12 H6 6FL S/S BOTTOM TAP
STANLEY A30LRA2-5 3/8" DRIVE ANGLE PNEUMATIC NUT RUNNER
FALK STEELFLEX FOR 50 & 1050T10 COVER GRID ASSEMBLY NIB
EAS 1/4" NPT FEMALE MONO COUPLER KBF6 *NEW*
STARCUT 1459758, GUNDRILL COOLANT, 13 7/8" OAL, 0.609", 5 1/2" SHANK, NIB
BELL & GOSSETT 3" X 4" CENTRIFUGAL PUMP SIZE 185016
APPLETON 1" ANGLE LIQUID TIGHT MALL IRON CONNECTOR ST-90100 *NEW LOT OF 3*
EATON 1/4"NPTM BRASS FITTING 68X6 *NEW LOT OF 10*
HARDING CS 001185001 FAN GRILL, LOT OF 2, NEW IN BAG
MORSE 2 1/2 - 4, TAP, NC, HS, GH-7, 6 FLUTE, 8 3/4" OVERALL LENGTH
OMRON E3C-S10 PHOTOELECTRIC SWITCH
YALE BACKCHECK SPRING ADJUSTMENT REVERSIBLE ALUMINUM DOOR CLOSER 3501 NEW
FESTO MINI PNEUMATIC CYLINDER AV-12-4
FALK 1.625" KW 3/8" X 3/16" COUPLING HUB, 1040T *NEW*
PHD CYLINDER ONLY BS10 1 X 20 -B-H4 NNB
FESTO MAINFOLD BLOCK FR-4-1/4C
WATTS FLUIDAIR 1/4" NPT INSERT KIT, IK20Y *NEW*
MOORE I/P CONVERTER 4-20MDAC 3-15PSI
TALEMA TOROIDAL POWER TRANSFORMER 8755-P2S2
DOOSAN WASHER TONGUE D917238 LOT OF 2 NEW
PARKER 3/8"NPT HYDRAULIC ROTARY ACTUATOR SERIES PS
BROWNING J50 S/C C/L CONNECTING CHAIN LINKS, LOT OF 2, NEW IN BAG
SLOAN A-15-A MOLDED DISC DIAPHRAGM FOR ROYAL & REGAL, LOT OF 5 NEW IN BAG SEALED
SMC 1/2" NPT MODULAR PIPING ADAPTOR E40T-04 *NEW IN BAG*
CARD 1-3/16-7 NS 4-FLUTE HAND TAP B-1
PARKER 4F-C4L-10-B CHECK VALVE, 1/4" NPT, 3000 PSI, NIB
EMECANIQUE ZCK J922H4 BODY CONTACT, NEW IN BAG
KAO 5.25" DOUBLE SIDED DOUBLE DENSITY DISKETTES MD2D *NEW LOT OF 10*
SKF EXPLORER BEARING 6205-2Z/C3 NIB
NIAGRA 1-1/2X3/4X1-5/8 2 FLUTE END MILL
SKF SNW 15X2-1/2" BEARING ADAPTER SLEEVE NIB SKF HE315
GREENFIELD 1 3/8-6, ROUND ADJUSTABLE DIE, NC, HS, 4 FLUTE, 3" OD, NIB
SALINA VORTEX CYLINDER DUC4.5X6-MG GRA05-F-S4-MG-W?S1-LL
3M 1" x 50YD, 80 GRADE, CLOTH UTILITY ROLL 051144-05110 *NEW*
FESTO 5-10 BAR CONTROL VALVE GR-1/8B0 151215 K008
HAGER 3.5" x 3.5", 1/2 M.S, FULL MORTISE-STD US 26D *NEW*
ECLIPSE 5/8" PIN DRIVE COUNTERBORE 413 6342
PARKER 250PSI, 2-PORT, 3/8"NPT FLOW CONTROL VALVE 3250G0319 *NEW*
LINCOLN DIVIDER VALVE UV-15S *NEW,SEALED*
CLEVELAND S62154 STYLE FORD SIZE 368 X 469 TAPER SHANK DRILL, 36YA-368 *NEW*
SATURN CIRCUIT BOARD CFUJK3-4 / SDB41024-2
PHD 1-3/8" X 3/4" PNEUMATIC CYLINDER 02942384-01 *NEW*
CLEVELAND 08686, SIZE 22 TAPER LENGTH DRILL, 5-3/4" OAL, HS, LOT OF 11, NEW
HALOGEN LEAK DETECTOR H25C-1N-6-N-E-P?S
HILTI 1" x 6" ANCHOR BOLT KB II 00045412 *NEW, LOT OF 3*
BRAD HARRISON 41360 MINI-CHANGE 5P FEMALE CORDSET, 6', NEW IN BAG
3M BLENDERM 1/2" x 5YD SURGICAL TAPE 1525-0 BOX OF 15
3M 7-1/8" FIBRE DISCS 983 CR *NEW, SEALED LOT OF 25*
UNION BUTTERFIELD 1/4X7, 4 FLUTE HAND TAP
DIXON 2-1/2" TO 5-1/2" RANGE, HOSE CAMPS HS-80 *LOT OF 10, NEW*
SMC 3/16" TUBE, 1/8"NPT FITTING KQU05-34S *NEW* LOT OF 10
WARNER 3/4" OPEN BALL BUSHING TWD-12 WRN *NEW*
BROWNING 7/8" BORE, SPLIT TAPERED BUSHING Q1 1 7/8 *NEW*
CM BIG ORANGE 2G804 1/8" WIRE ROPE CLIPS, LOT OF 5, NEW IN BAG
SANDVIK 2-1/2" STAINLESS STEEL CLAMP 76.1 / 9204 LOT OF 4
BRAD HARRISON 883030D01M003, 3P MALE/FEMALE CORDSET EXTENSION, NEW IN BAG
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