咨询热线－－-17750626260

当PLC运行时，是通过执行反映控制要求的用户程序来完成控制任务的，需要执行众多的操作，但CPU不可能同时去执行多个操作，它只能按分时操作（串行工作）方式，每一次执行一个操作，按顺序逐个执行。由于CPU的运算处理速度很快，所以从宏观上来看，PLC外部出现的结果似乎是同时（并行）完成的。这种串行工作过程称为PLC的扫描工作方式。

用扫描工作方式执行用户程序时，扫描是从条程序开始，在无中断或跳转控制的情况下，按程序存储顺序的先后，逐条执行用户程序，直到程序结束。然后再从头开始扫描执行，周而复始重复运行。

【诚信经营】【质量可靠】【进口原装】【拆包防伪】

【超大库存】【当天付款】【顺丰速运】【欢迎抢购】

**********************************************************

厦门莫格电气自动化有限公司

张芳（销售工程师）

电  话：/17750626260

Q    Q：177763184

邮  箱：177763184@qq.cm

传  真：

网址：http://www.mogget.cn

诚信经营，质量为首，诚信至上，莫格电气竭诚为您服务！

**********************************************************

PIAB -70KPA VACUUM SWITCH NIB 3116088

SICK * 30 FGS SAFETY LIGHT CURTAIN * FGSS 900-221

BANNER PLASTIC FIBER OPTIC CABLE PBF26U NIB

RDP SENSOR RDP4100-138P-T 102577

NAMCO EE280-92140 CYLINDICATOR SENSOR, NNB

IFM ELECTRONIC PHOTOELECTRIC SENSOR 0GE500

COOPER INSTRUMENTS AC POWERED SIGNAL CONDITIONER BRIDGE SENSOR DCM 433

BANNER MULTI-BEAM SCANNER BLOCK 9150

DELPHI OXYGEN SENSOR ES10732 NIB

PEPPERL + FUCHS * PROXIMITY SENSOR NIB * 094310

DELPHI OXYGEN SENSOR ES10346 NIB

DELPHI OXYGEN SENSOR ES10588 NIB

CROMPTON INSTRUMENTS 256-TWMU PALADIN TRANSDUCER, NNB

KEYENCE LIGHT CURTAIN RECIEVER SL-C48HM-R

BANNER REMOTE SENSOR SP100E

MICRON POSITION TRANSDUCER 36-107-204-1358

BANNER POWER BLOCK SENSOR SCANNING HEAD OPBTEQDH

BENTLY NEVADA VELOCITY SEISMOPROBE 16699-01-05-01

BANNER OPPOSED MODE SENSOR T186EQ NIB

SICK 24VDC 50/60HZ OPTIC ELECTRONIC SAFETY 

PRINTRONIX PAPER MOTION SENSOR 108616-901

CUTLER HAMMER COMET PHOTOELECTRIC SENSOR 13104R6517 NIB

RIPLEY LIGHT WATCHMAN PHOTO SELL SWITCH 7001

TELEMECANIQUE PHOTO ELECTRIC SENSOR XUE-H017535

SMC AUTOSWITCH/SENS?OR D-A73H

NAMCO PROXIMITY SWITCH EE951-02103 NIB

NOSHOK 2.5" 0-1500PSI PRESSURE GAUGE 1500

BALLUFF PROXIMITY SENSOR 516-420-A0-LPC NIB

ELECTRO SENSOR SPEED SWITCH SS-100

SMC AUTO SWITCH PROXIMITY SWITCH D-A53

IFM EFFECTOR IN2004FRKG IN5262 PROXIMITY SWITCH NIB

TELEMECANIQUE * ZCK Y091 LIMIT SWITCH ACTUATING KEY * 059973

PRIME CONTROLS DUAL PROBE SENSOR P1000BC

CUTLER-HAMMER, 18MM TUBULAR PHOTOELECTRIC REFLEX NIB

IFM EFECTOR 20-140VAC INDUCTIVE SENSOR ID0039 IDC2050BARKA/LS?-100AK

SICK LIGHT CURTAIN C40E-0603AN310

HARTMANN & BRAUN SENSYCON 0-20mA CONVERTER TEIP 11

STI 43531-0360 36" 0.3-30M RANGE LIGHT CURTAIN TRANSMITTER

DELPHI OXYGEN SENSOR ES10714 NIB

DELPHI OXYGEN SENSOR ES10297 NIB

SICK SENSOR WL250-N430

BEI TECHNOLOGIES INDUSTRIAL ENCODER 924-01002-9714

EATON CUTLER-HAMMER 13107RSQD03 COMET SERIES 20-264 VAC PROXIMITY SENSOR, NNB

OTHER * IFM EFFECTOR PHOTOELECTRIC SENSOR * OGT500

SICK 8W LIGHT CURTAIN FSGE 1800-211

SICK 8W LIGHT CURTAIN FSGE 1800-211

SKF PEAK SENSOR CMSS2200

SKF VIBRATION SENSOR CMSS799LF

SICK FIBER OPTIC LIGHT GUIDE LBST NIB 32900

BANNER SENSOR POWER SUPPLY 65849 NIB

COMPACT * LIGHT CURTAIN TRANSMITTER * CT30-1650

BANNER 27190 PHOTOELECTRIC DC POWER BLOCK OPBTEQDH

CTC PROTECTION & RELIABILITY OPTIMZATION INSTRUMENT SC203100A002IR0?1001K

DELPHI SS10484 SPEED SENSOR, NIB

BANNER MAXI-BEAM SENSOR MODEL RSBF

PEPPERL + FUCHS RHINO NO P/N

FOXBORO TEMPETURE SENSOR MT-13NJGS-012