1756-OW16I
1756-OW16I
1756-OW16I
(2)执行程序 在执行用户程序过程中,PLC按梯形图程序顺序自上而下、从左至右逐个扫描执行,即按助记符指令表的先后顺序执行。但遇到程序跳转指令,则根据跳转条件是否满足来决定程序跳转地址。程序执行过程中,PLC从输入映像区中取出输入变量的当前状态,然后进行由程序确定的逻辑运算或其他运算,根据程序指令将运算结果存入相应的内部继电器中,包括输出继电器、内部辅助继电器、定时器、计数器等。输出继电器的信号存放在输出映像区,即输出继电器与PLC外部的同编号的输出点对应。
在程序执行过程中,同一周期内,前面的逻辑结果影响后面的触点,即后执行的程序可能用到前面的***新中间运算结果;但同一周期内,后面的运算结果不影响前面的逻辑关系。该扫描周期内除输入继电器以外的所有内部继电器的***终状态(导通与否),将影响下一个扫描周期各触点的开与闭。
(3)输出刷新 程序执行阶段的运算结果被存入输出映像区,而不送到输出端口上。在输出刷新阶段,PLC将输出映像区中的输出变量送入输出锁存器,然后由锁存器通过输出模块产生本周期的控制输出。如果内部输出继电器的状态为“1”,则输出继电器触点闭合。全部输出设备的状态要保持一个扫描周期。
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PACIFIC HYDRAULIC RELIEF VALVE MANIFOLD 10M-J26D-W1
PILLAR TECHNOLOGIES SCR MODULE AB1301-2
BODINE ELECTRIC ***ALL MOTOR 42Y3BFPP WITH BOSCH GEAR RE
DATARAM MEMORY CARD 63016-CO-189370039
ENDRESS & HAUSER PMP75-RBC1PB1TBDBA TRAN***ITTER
DORRIS DOUBLE REDUCTION BASE TYPE GEAR DRIVE 12174 17.3
VEXTA 2 PHASE STEPPING MOTOR PH26102B-C6 1.8o/STEP
ORMEC D-SERIES SERVO DRIVE SAC-D19P/A REFURBISHED
MODICON MAINBOARD 486-GVT-2 CPU PROCESSOR K4088572
METTLER TOLEDO 1000K MECHANICAL SCALE CONVERSION 0951
GE TRANSFORMER HT01AH852 2 KVA 9T51B0012G04
RECONDITIONED REULAND 3 Hp DUAL SHAFT ELECTRIC MOTOR 21
BENDER GROUND FAULT MONITOR 90-132 VAC 50/400 Hz MO
DEVRON HERCULES AUTO SLICE SYSTEM HARMONIC ACTUATOR
VELAN 1/4" BALL VALVE CF8M FLANGED W/HYTORK-25 ***-
BOSCH OUTPUT MODULE 1070075333-102
ACME ELECTRIC T-2-53516-3S TRANSFORMER 10 KVA PRI 240/4
GOULD SHAWMUT 3000 AMP FUSE 600 VAC CURRENT LIMITIN
ALLEN BRADLEY 1391-DES15-DI-AQB SERVO DRIVE 230 VOLT AC
ROSEMOUNT 1151 PRESSURE TRAN***ITTER 1151DP4S22S2M1
RELIANCE ELECTRIC CIRCUIT BOARD 0-58719-2 B
PREMIA 75 SOLENOID METERING PUMP KIT MODEL No. KH7K
STAINLESS STEEL PEER ROLLER CHAIN T-2752 1-1/3" PIT
COSTAR CS-2000 LABORATORY CIRCULATION PUMP MODEL # 3133
FLOWSEAL 3" STAINLESS STEAL BUTTERFLY VALVE
RELIANCE ELECTRIC 1/2HP 75V 6.50 AMPS 1750 RPM SHAF
IBS HUEHNE SEILLANGENGEBER WIRE ACTUATED ENCODER SG400S
IBS HUEHNE SEILLANGENGEBER WIRE ACTUATED ENCODER SG500
LITTON SERVOTECHNIK ENCODER 2500-120-12CP G70DSLDBI
SQUARE D SIZE 1 STARTER WITH NEMA 12 ENCLOSURE 8536
PMC ELECTRONIC PRESSURE TRAN***ITTER 24 VDC 30 PSIG
PMC ELECTRONIC PRESSURE TRAN***ITTER 24 VDC 60 PSIG
WILDEN 02-9146-20 KIT P2 POLYPRO RUBBER/TYPE 1
PMC ELECTRONIC PRESSURE TRAN***ITTER 24 VDC 15 PSIG
PMC ELECTRONIC PRESSURE TRAN***ITTER 24 VDC 10 PSIG
STI FLOW METER 321-3A4B-100-385-1C00-006 120VAC SPDT 10
SQUARE D CIRCUIT BREAKER 225 AMP KAP36225
STI FLOW METER 341-0442-103/385-1C00-006 120VAC SPDT 10
STI FLOW METER 345-0442-103/385-1K00-006 120VAC SPDT 10
BALDOR MOTOR FOR HAZARDOUS LOCATI*** .75 HP 7 AMPS
IBS HUEHNE SEILLANGENGEBER WIRE ACTUATED ENCODER SG500S
SQUARE D FC34070 CIRCUIT BREAKER 70 AMP I LINE CIRCUIT
IBS HUEHNE SEILLANGENGEBER WIRE ACTUATED ENCODER SG02
ARMSTROMG STEAM TRAP 11 *** 400 PSIG 27.6 BAR 100oF/
SQUARE D 225 AMP 125 AMP MAIN BREAKER ELECTRICAL PANEL
ITE HE3-B050 CIRCUIT BREAKER 50 AMP 3 POLE 600 VOLTS AC
RECONDITIONED ELECTRA GEAR SPEED REDUCER 16:1 RATIO MOD
WATSON MARLOW PNEUMATIC PERISTALTIC PUMP DRIVE 501P-110
GL HYDRAULIK HYDRAULIC CONTROL VALVE MS43P06CF01A1B
CROUSE HINDS HAZARDOUS LOCATION LIGHT EVBS230R/120
ATLAS SOUND EXPLOSION PROOF LOUDSPEAKER DRIVER 60 W
MARATHON 1/4 HP ELECTRIC GEARMOTOR 39.7 OUTPUT RPM
NORD UNICASE INLINE GEARBOX .33 HP RATIO 262.24 6.2
TEXTRON CONE DRIVE GEAR REDUCER 30:1 HV35A022-W7A
RELIANCE GEARMOTOR DRIVE 3.4 Hp 25:6 RATIO OUTPUT RPM 8
MOVO GEARMOTOR DRIVE .3/1.8 Hp RPM 13.8/84 RPM MODEL No
DYNAPAR TACHOMETER WITH ALARM 115/230 VAC MTJR1S00
REFURBISHED LETAG 2.2 KW MOTOR 1710 RPM 277 / 480 VAC P
PEERLESS 10 HP CENTRIFUGAL PUMP 2" X 1" MODEL PE835
WESTINGHOUSE CIRCUIT BOARD 2840A18
FISHER PROVOX CL7661X1-BA1 MPU/MEM CL7661X1-A5 MPU P2.2
RELIANCE MASTER XL GEARMOTOR 230/460 VAC 31:4 RATIO 1/2
SIMPLEX 4100 RS232 / 2120 MODEM CARD 565-415
ELECTRA-GEAR 26MC520N CX0002 REDUCER 20:1 RATIO 1.2
HAYWARD STAINLESS STEEL BASKET STRAINER 262F
DODGE TORQUE ARM REDUCER TXT305ASV 213155JF 17.85HP RAT
ASCO OVER VOLTAGE MONITOR 120 VAC 1 PHASE TRIP 138 VOLT
ALLENAIR BRASS HYDRAULIC CYLINDER CH-B-RH-36
SQUARE D 90 AMP I-LINE CIRCUIT BREAKER 600 VAC 3 POLE 2
CENTERLINE 53 MANUAL ACTUATED 8" BUTTERFLY VALVE 50
BALDOR 1 HP INVERTER ID15H401-E W/ GSD PROFIBUS BOARD
VICKERS HYDRAULIC DIRECTIONAL CONTROL VALVE DG5S H8
AUTODRIVE FREQUENCY INVERTER MOTOR CONTROLLER POWER SUP
SIEMENS CONTROLLABLE SIGNAL MODULE C***-4
HAYWARD 7BCF-2236 FILTER BASKET .006 SLOT 6080SS626
JOHNSON CONTROLS METASYS AS-FMK100-0 FUNCTION MODUL
SQUARE D SIZE 0 ENCLOSED MOTOR STARTER 8536SBG2 NEMA 3R
DANFOSS VLT 2025 2000 SERIES VFD DRIVE 2.2 KVA 460 VOLT
