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可编程控制器PLC系统程序、用户程序、编程语言

1、系统程序

系统程序是PLC赖以工作的基础，采用汇编语言编写，在PLC出厂时就已固化于ROM型系统程序存储器中。

系统程序分为系统监控程序和解释程序。

系统监控程序用于监视并控制PLC的工作，如诊断PLC系统工作是否正常，对PLC各模块的工作进行控制，与处设交换信息，根据用户的设定使PLC比处在编制用户程序状态或者处在运行用户程序状态等。

解释程序用于把用户程序解释成微处理器能够执行的程序。来自PLC之家。 

2、用户程序

用户程序又称为应用程序，是用户为完成某一特定   的控制任务而利用PLC的编程语言编制的程序。 来自PLC之家。 

用户程序通过编程器输入到PLC的用户程序存储器中。 

3、编程语言

可编程控制器是通过程序对系统进行控制的，所以各种机型的PLC都有自己的编程语言。

PLC的编程语言有多种，如梯形图、语句表、逻辑功能图、逻辑方程式等。下面介绍常用的梯形图和语句表编程语言。

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 V18345-201050001 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