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主营AB/ABB/GE/施耐德/本特利/ TRICONEX 巴赫曼/西屋/黑马 福克斯波罗 霍尼韦尔 等PLC 模块卡件
PLC以微处理器为核心，具有微机的许多特点，但它的工作方式却与微机有很大不同。
微机一般采用等待命令的工作方式工作。
PLC是按集中输入、集中输出，周期性循环扫描的方式进行工作的。每一次循环扫描所用的时间称为一个扫描周期。
对每个程序，CPU从条指令开始执行，按顺序逐条地执行指令做周期性的程序循环扫描，如果无跳转指令，则从条指令开始逐条顺序执行用户程序，直至结束又返回条指令，如此周而复始不断循环。
PLC在每次扫描工作过程中除了执行用户程序外，还要完成内部处理、输入采样、通信服务、程序执行、自诊断、输出刷新等工作。PLC工作的全过程包括三个部分，即上电处理、扫描过程和出错处理。PLC工作的全过程可用图4所示的运行框图来表示。
PLC通电后，CPU在系统程序的控制下行内部处理，包括硬件初始化、I/O模块配置检查、停电保持范围设定及其他初始化处理等工作。
MASONEILAN DRESSER SVI2-21123111 SVI-II DIGITAL VALVE POSITIONER 150PSI D597302
MASONEILAN DRESSER 8012-2C ELECTRO-PNEUMATIC VALVE POSITIONER D569537
MASONEILAN DRESSER 8012-4C ELECTRO-PNEUMATIC VALVE POSITIONER D569590
GOULDS 053224G0001002 5322400AA IRON PUMP DISK D560712
FISHER 3582C-NS11 PNEUMATIC VALVE POSITIONER 3-15PSI D560764
MOYNO TS A2B5000 STAINLESS 8IN PUMP ROTOR D587607
GORMAN RUPP 38515-548 1706H STAINLESS PUMP SHAFT D578781
VALVCON LVW2500TE2S115VAC ELECTRIC VALVE ACTUATOR 115V-AC D574617
FLOWSERVE 134625 DURASEAL 1.499 IN STAINLESS SHAFT SEAL ASSEMBLY D522005
IMO 3222/112R SCREW PUMP REPAIR KIT D543454
PARKER 10GAL 5000PSI HYDRAULIC ACCUMULATOR BLADDER D497539
SULZER K111-6 REPAIR SEAL KIT 2.25IN D577026
PACO 91910195 GENUINE REPAIR SEAL KIT 2.25IN D574489
JOHN CRANE M123093 STAINLESS TYPE 8-1 SEAL ASSEMBLY 2.375IN D589660
PATERSON 7-VANE 14-1/4 IN BRONZE PUMP IMPELLER D530999
GOULDS 3196 LT 2X3-13IN PUMP POWER END D499399
GOULDS 3196 MT CENTRIFUGAL IRON PUMP POWER END D591486
GOULDS 3196 MT IRON CENTRIFUGAL PUMP POWER END D591204
GOULDS 3196 MT CENTRIFUGAL PUMP POWER END 1X2-10 30GPM 1800RPM D591099
FISHER 2516 MULTI-TROL VALVE RECEIVER/CONTROLLER 3-15PSI D587027
GOULDS 3298 ITT PUMP CASING & FRAME ADAPTER D585993
REXROTH VT-VRPA 1-527-20/V0/RTS-2/2V HYDRAULIC VALVE AMPLIFIER CARD D555723
GOULDS 3196MT VANE STAINLESS PUMP IMPELLER 12IN D581469
SPX 132357+ WAUKESHA PEEK SEAT INSTALL TOOL KIT D574467
MASONEILAN DRESSER FVP110 F1A3N/LC1/FF1 VALVE POSITIONER 20-60PSI D569606
FLOWSERVE EK342 STAINLESS PUMP SEAL KIT PTO-2.500-E U 5 E F/V V V D563895
LIMITORQUE SMC-031 VALVE ACTUATOR D564577
ROSEMOUNT 03031-1045-0022 PRESSURE TRANSMITTER SENSOR D595614
BETTIS T-312B ROBOTARM 115PSI PNEUMATIC VALVE ACTUATOR D563976
VALVCON LVW1000KSTN115AC 0.8A 115V-AC 1000IN-LBS VALVE ACTUATOR D579771
VALVCON LVW1000KS2TN115AC ELECTRIC VALVE ACTUATOR 115V-AC D579474
ASCO 067176-003 RED-HAT FP86366 SOLENOID VALVE COIL KIT D545511
SUNDSTRAND MCV104A7501 TWO-STAGE ELECTROHYDRAULIC PUMP STROKE CONTROLLER D591614
GOULDS 3196 2X3X13IN STAINLESS PUMP CASING D594022
CHESTERTON 280 STAINLESS DUAL CARTRIDGE STACK PUMP SEAL 3IN D594312
MASONEILAN DRESSER TYPE 38 SIZE 15 PNEUMATIC SPRING ACTUATOR 6-30 PSI D592787
VALVCON LVW1000KS2TN115AC ELECTRIC VALVE ACTUATOR 115V-AC D579764
REXNORD 620735 THOMAS DPK AMR 500 HHS STAINLESS COUPLING DISC PACK D561734
VALVCON LVW1000FTE2S115VAC ELECTRIC VALVE ACTUATOR 115V-AC D574428
PACO 91911104 GENUINE PUMP REPAIR KIT D574492
FISHER TL122 MANUAL LOADING STATION D569026
ABB AV442100N PULSE INPUT VALVE POSITIONER 150PSI 50MA 34V-DC D591266
ALFA LAVAL 7610210SM2H202SSSSYS121 TRI-CLOVER STAINLESS VALVE ACTUATOR D599322
BECK 20-2705-21 VALVE ACTUATOR MOTOR ASSEMBLY 3NM D583891
JAMESBURY QPX2D/M QUADRA-POWR X VALVE ACTUATOR D553882
FLOWSERVE 2114549-183-CHPH 18-1/2 IN 4-VANE STEEL PUMP IMPELLER D562987
SPX 132356+ WAUKESHA PEEK SEAT INSTALL TOOL KIT D574465
CHESTERTON 280 168299 SIZE 17 DUAL CARTRIDGE SEAL 2-1/8-IN SHAFT D596052
EL-O-MATIC ED1600.U1A00A.46K0 PNEUMATIC VALVE ACTUATOR D597082
EL-O-MATIC ED1600.U1A00B.46K0 PNEUMATIC VALVE ACTUATOR D597084
EL-O-MATIC EL1600 ELECTRIC VALVE ACTUATOR 110V-AC D597086
FLO-TORK A500-184-CB-ET-MS1-PKH-N ROTARY VALVE ACTUATOR 125PSI D597399
WEIR B005M WARMAN PUMP BEARING ASSEMBLY D599409
REXNORD 318484 SR71 412 STL COUPLING PARTS KIT D559622
BLACKMER 2X3X10 STAINLESS CENTRIFUGAL PUMP CASING WITH IMPELLER D568760
AUR-O-MET 3410 D02497A01 5VANE 13-1/2IN BRONZE PUMP IMPELLER 1-3/4IN D581640
FLOWSERVE 25APKD3AX3G CCN62556550 PUMP IMPELLER 12IN OD 2IN BORE D561156
JOHN CRANE MD68067R CARTRIDGE 676 LASCO DEFLAKER 3IN PUMP SEAL D592730
CHESTERTON 280-16 STAINLESS DUAL CARTRIDGE PUMP SEAL 2IN D589665
EL-O-MATIC EL1600 ELECTRIC VALVE ACTUATOR 110V-AC D597204
WATTS RK 909 CK2 6 SECOND CHECK VALVE REPAIR KIT D580503
SUMMIT 2196STO STO IRON CENTRIFUGAL PUMP POWER END 1X1.5-8IN D594141
GOULDS 3196 MTI IFRAME CENTRIFUGAL IRON PUMP POWER END D594035
FISHER 3582G PNEUMATIC VALVE POSITIONER D560115
ASCO 214093 RED-HAT II SOLENOID VALVE REBUILD/REPAIR KIT D563959
DODGE 132158 SLEEVOIL SIZE 8 SPLIT THRUST COLLAR D559949
MDC 937076 GV 2.0-2.5V C2 STAINLESS BELLOWS ASSEMBLY D596811
ABB V001 TZIDC ELECTRO-PNEUMATIC VALVE POSITIONER D597118
EL-O-MATIC ED0950.U1A00A.36K0 PNEUMATIC VALVE ACTUATOR 116PSI D597378
EL-O-MATIC ES0950.U1A03A.S36KS0 PNEUMATIC VALVE ACTUATOR 116PSI D598346
FLOWSERVE 9940 10076821 XL SERIES VALVE POSITIONER D598834
EL-O-MATIC ES0950.U1A04A.36K0 PNEUMATIC VALVE ACTUATOR D597081
SIEMENS 74G PNEUMATIC VALVE POSITIONER D599135
UNITORQ UTQ-020 QUARTER-TURN ELECTRIC VALVE ACTUATOR 120V-AC D599933
REXNORD 620735 THOMAS DPK AMR 500 HHS STAINLESS COUPLING DISC PACK D560607
FLOWSERVE AR218192-01 BALANCED PUSHER SEAL A/S:I DE DQ22505N4U DB/DB D591080
DODGE 132222 5-7/16 RT THRUST PLATE KIT D591087
MISSION 1551715 MFK MUD PUMP SELF ALIGNING PISTON ROD D593578
GOULDS 3196MTX CENTRIFUGAL PUMP POWER END D594036
GOULDS 3196MTX CENTRIFUGAL PUMP POWER END D594036
ROSEMOUNT 03031-1045-0012 STAINLESS DIFFERENTIAL SENSOR MODULE D594611
EL-O-MATIC ES0350.U1A04A.27K0 PNEUMATIC VALVE ACTUATOR 116PSI D597278
DODGE 132220 4-7/16 RT THRUST PLATE KIT D591100
MASONEILAN DRESSER SVI2-31123121 SVI-II DIGITAL VALVE POSITIONER 150PSI D597344
STURM 14IN OD 2IN ID BRONZE PUMP IMPELLER D511627
FOXBORO P110 VALVE ACTUATOR D523967
ABB AV4421000 PNEUMATIC VALVE POSITIONER D536638
WEIR 44395 BEARING CARTRIDGE ASSEMBLY SLURRY CENTRIFUGAL PUMP D532039
8-VANE 20IN OD 2-3/8IN ID BRASS PUMP IMPELLER D533223
JOHN CRANE 676GLC-SGF727-46 MECHANICAL PUMP SEAL D580048
FLOWSERVE RG210SR4SN0GE00 AUTOMAX PNEUMATIC VALVE ACTUATOR D579969
BALDOR DODGE 132953 PILLOW BLOCK BEARING LINER STEEL D575979
BECK 20-2701-20 VALVE ACTUATOR MOTOR ASSEMBLY 1NM D583792
GOULDS 1K357 STEEL MOTOR PUMP FRAME ADAPTER D584392
GOULDS 68643 11-3/4 IN OD 3/4 IN ID 5 VANE STAINLESS PUMP IMPELLER D581625
FISHER DVC6005 FIELDVUE POSITIONER VALVE 4-20MADC 145PSI 30V-DC D585649
ENDRESS HAUSER MODEL E1 TRANSMITTER PROBE HOUSING ASSEMBLY 10FT D577123
TACO 953-1371L 7-1/2IN 7 VANE STAINLESS PUMP IMPELLER 7/8IN BORE D595255
ALFA LAVAL 761011SM2H201SSSSYS121 TRI-CLOVER STAINLESS VALVE ACTUATOR D595208
BWIP 2R12870DB-A QBQ2500 BW SEALS STAINLESS PUMP SEAL D595949
EL-O-MATIC ES0200.U2A03A.S22KS0 PNEUMATIC VALVE ACTUATOR D596942
BARBER COLMAN EA23-11010-000-0-00 ELECTRIC ROTARY ACTUATOR 120V-AC D597173
EL-O-MATIC FD0350U PNEUMATIC VALVE ACTUATOR D597281
FLOWSERVE CSG-0940-S1 INNOMAG IRON CENTRIFUGAL PUMP CASING 2-1/2 X 2IN D597309
MASONEILAN DRESSER SVI2-31123121 SVI-II DIGITAL VALVE POSITIONER 150PSI D597298
DODGE 043619 H3132-SNW-507 BEARING ADAPTER D598882
GEA DE-IPS4-SZ-N21-RH STAINLESS VALVE ACTUATOR D559874
GEA DA-IPS4-APS4-SZ-N21-RH STAINLESS VALVE ACTUATOR D555921
GEA DA-IPS4-SZ-N210-RH STAINLESS VALVE ACTUATOR D555924
DODGE 043619 H3132-SNW-507 BEARING ADAPTER D598879
AUMA SG05.1 SD0050-4/40 1/16HP 460V-AC VALVE ACTUATOR D539132
ATLAS COPCO 2906-0390-00 ZR16C-275 CHECK VALVE KIT D531835
ABB AV442100N PULSE INPUT VALVE POSITIONER 150PSI 50MA 34V-DC D585651
MASONEILAN DRESSER 7 VALVE POSITIONER D586572
TOYODA 7GR-497 CBN120L175VMAGR302 14A1M 11-1/2IN GRINDING WHEEL D586713
TACO 953-1055S 6-VANE 7-1/2IN OD 7/8IN BORE STAINLESS PUMP IMPELLER D591296
TRI CLOVER 761TR-21W-29S ALFA LAVAL STAINLESS DIVERT VALVE ACTUATOR D592903
STANLEY 20M200100K ELECTRIC DRIVER MOTOR ASSEMBLY D592974
FLOWSERVE CSG-0905-S1 INNOMAG SEALLESS IRON CENTRIFUGAL PUMP CASING D593091
PNEUMATIC PRODUCTS 1223088 HCP OUTLET & PURGE VALVE REPAIR KIT D583877
GOULDS 256-115 1013 3196 XLT 14IN OD STEEL PUMP IMPELLER D532495
FLOWSERVE BXHHBW-4000-HXCX/BXH-4000-APCX MECHANICAL PUMP SEAL KIT D580252
FLOWSERVE QBB-3375-5U9X/QBW-3375-5U9X EK 660 MECHANICAL PUMP SEAL D580254
BECK 20-2701-20 VALVE ACTUATOR MOTOR ASSEMBLY 1NM D583794
PNEUMATIC PRODUCTS 1223088 HCP OUTLET & PURGE VALVE REPAIR KIT D583878
6IN THRUST COLLAR 25IN BORE D581149
WATTS 0887762 RK 909M1-RT 10 TOTAL RUBBER REPAIR KIT D590487
BAILEY 258299A2521B 1 TRANSDUCER SPARE PARTS KIT D526103
ALFA LAVAL UNIQUE 7000 LS TRI-CLOVER SANITARY STAINLESS VALVE ACTUATOR D596259
DRESSER 010275042-779-0000 ACTUATOR DIAPHRAGM SIZE 18 3/4IN HOLE D597338
AW103RVD410.5 STAINLESS PUMP IMPELLER 5-VANE 10IN OD D597520
CHESTERTON S10/S20/OS 185382 STAINLESS PUMP SEAL 1.75 GLA KIT S AFL D599708
WEIR M740850 6VCG SLURRY PUMP IMPELLER 6-VANE 15-1/2IN OD D599752
WEIR D3110A05 SLURRY PUMP VOLUTE LINER 4X3IN D599754
FLOWSERVE 01PEX42090 2R54100DB MECHANICAL PUMP SEAL ASSEMBLY D594456
FISHER 667 6-30PSI SIZE 30 PNEUMATIC VALVE ACTUATOR D582958
INPRO/SEAL 2200-A-13351-0 BRASS PUMP BEARING ISOLATOR D591016
GRUNDFOS CR60-30 STAINLESS PUMP IMPELLER STACK ASSEMBLY D586672
WEIR B005M WARMAN PUMP BEARING ASSEMBLY D590816
INPRO/SEAL 2200-A-04260-0 BRASS BEARING ISOLATOR D591361
TRI CLOVER 761TR-21W-29S-2-316L-12-1 ALFA LAVAL DIVERT VALVE ACTUATOR D592940
TRI CLOVER 761TR ALFA LAVAL STAINLESS SANITARY DIVERT VALVE ACTUATOR D592902
MARTIN ENGINEERING 35150 XHV CANNON INSTALLATION KIT D593548
SIEMENS 760P11AAAGNND6 SERIES 760 VALVE POSITIONER D593556
