3E032455

详情描述：

3E032455

3E032455

3E032455

PLC是采用“顺序扫描，不断循环”的方式进行工作的。即在PLC运行时，CPU根据用户按控制要求编制好并存于用户存储器中的程序，按指令步序号（或地址号）作周期性循环扫描，如无跳转指令，则从条指令开始逐条顺序执行用户程序，直至程序结束。然后重新返回条指令，开始下一轮新的扫描。在每次扫描过程中，还要完成对输入信号的采样和对输出状态的刷新等工作。

PLC的一个扫描周期必经输入采样、程序执行和输出刷新三个阶段。

PLC在输入采样阶段：首先以扫描方式按顺序将所有暂存在输入锁存器中的输入端子的通断状态或输入数据读入，并将其写入各对应的输入状态寄存器中，即刷新输入。随即关闭输入端口，进入程序执行阶段。


BELDEN 9553 CABLE 300:VOLT AWG:18 154394

CARRIER 19DM3321504 DISCHARGE VOLUTE 3 FOR:19D-SERIES

WINSMITH 943MDNS15DLR132-B542 METRIC SPEED REDUCER 15:1

TRANE 2TEE3F62A1000A 5 TON MULTIPOSITION FAN COIL R22

MILLIPORE CORPORATION FTPF05441 DEGASSER 145862

DAYTON 1/2-2 HP EXHAUST VENTILATOR 551-875 RPM 146597

BLACK BOX TD202-R2 ETHERNET AND TOKEN RING BOOKS 156337

ECOLOGIX DRT60 3.5 TON AIR HANDLER 153384

PHOENIX PD6231 AEROCOOL EVAPORATIVE COOLER 230V 159012

WEG 03018EP3E286T 30 HP ELECTRIC MOTOR RPM:1755 153341

ASTERIA 9760959 59x59 CORNER WHIRLPOOL BATH 160798

RHEEM RAND-048DAZ 4 TON 13 SEER SS AIR CONDITIONER

CARRIER 17DA831104 SHAFT 5"DIA X 43"L 150176

RHEEM RANL-048YAZ 4 TON SS AIR CONDITIONER 3-PHASE

HEATILATOR GDST60I 36" TWO SIDED NATURAL GAS FIREPLACE

HEATILATOR GDST60I 36" 2-SIDED NATURAL GAS FIREPLACE

HEATILATOR GDST60I GAS FIREPLACE 36" TWO SIDED

ICP PAB048N1H 4 TON ROOFTOP AIR CONDITIONER 56517

DAYTON 20" BENCH DRILL PRESS 1HP 120V 60HZ 16AMPS 70241

REZNOR HMA400AL42VTSE2N 400,00 BTU DUCT FURNACE TUBES

CARRIER 50HQ-900521 LOOP CONTROLLER W/ B OPTION 146286

SQUARE D DT362 FUSIBLE SAFETY SWITCH 161221

DAYTON 36" FAN CIRCULATOR 1 HP 115/230V 1140:RPM 91777

DAY AND NIGHT C9MPV050F12D 50,000 GAS FURNACE 92%

MITSUBISHI CMB-106NU-F BC CONTROLLER 208/230V 145999

MITSUBISHI CMB-106NU-F BC CONTROLLER 208/230 VOLT

WINSMITH 935MDSN METRIC SPEED REDUCER 5:1 345:RPM 45999

WINSMITH 935MDSN50DLR90-B1435 SPEED REDUCER 50:1 61542

COPELAND ZR16M3-TW7-568 13 TON SCROLL AC/HP COMPRESSOR

WINSMITH 943MWNS076X0GC METRIC SPEED REDUCER 60:1

JACUZZI K374969 60" OYSTER FIBERGLASS BATH 160252

WEG 02518EP3E284TC 25 HP MOTOR 208-230/460 VOLT 159310

TRANE 2TEE3F65A1000A 5 TON MULTIPOSITION FAN COIL 55459

DAYTON 36" INDUSTRIAL HAZARDOUS LOCATION AIR CIRCULATOR

MI-T-M GC-2403-0MHB 5.5HP PRESSURE WASHER 2400PSI 81640

RHEEM RPNL-042JAZ 3.5TON 13 SEER SPLIT SYSTEM HEAT PUMP

RHEEM RPNL-042JAZ 3.5TON 13SEER SPLIT SYSTEM HEAT PUMP

CHAMPION COOLER 4001DD-N43/48D EVAPORATIVE COOLER 53789

DAYTON 36 CABINET EXHAUST FAN/RPM 611 156894

CARRIER 50HQ-900531 LOOP CONTROLLER W/ C OPTION 146287

THERMO SCI BARNSTEAD LABLINE 95097 PREMIUM CONTROLLER

AVAYA HD-700009517-EXPO SYSTIMAX OPTICAL CABLE 156301

DAYTON 5VD79A 150,000 INFARED TUBE HEATER 152403

CORNING TB110FNRUL 540 FEET FIBER OPTIC CABLE 154396

ETHERNET CISCO2505#CH(UTP HUB PORTS)DUAL SERIAL RT

KOHLER K-1164-47 72x42 ALMOND WHIRLPOOL BATH 160573

DAYTON SUPPLY VENTILATOR/DIRECT DRIVE DOWNBLAST 160086

TRANE CSHB175KO*OM 17.6T REFRIGERATION COMPRESSOR 10638

U-LINE ULN-BI98WH-00 ICEMAKER, 23 LBS/DAY, WHITE 49232

DAYTON 1-HP HI VOLUME & VELOCITY CIRCULATOR FAN 60469

COZY 90N75A 75,000 BTU FLOOR FURNACE 159688

MULTI SERVSWITCH KV155A-SFI 153220

TRANE TDX1B040A9H21B 40,000 DOWN/HORIZ GAS FURNACE 91%

TRANE TDX1B040A9H21B 40,000 DOWN/HORIZ 91% GAS FURNACE

DAYTON 36 INCH TUBEAXIAL FAN 162549

A HIGH SPEED T1 FORMAT PROCESSOR MT202A-449-R2 153235

BLACK BOX EB-LR3001A-CT21 REMOTE BRIDGE/ROUTER 155142

RHEEM EGSP30-B 30 GALLON 240 VOLT WATER HEATER 160639

BLACK BOX TD115VE#R3 SERIAL TEST COMPROBE FOR WINDOWS

ALLEGRO 9516 115/230 VOLT HIGH OUTPUT BLOWER 158058

AO SMITH BN37 7.5 HP MOTOR 230/460 VOLT 1765 RPM 81637

WINSMITH 935** 60:1 METRIC SPEED REDUCER 29:RPM 66342

TRANE 2TEE3F49A1000AA 3.5TON MULTIPOSITION FAN COIL R22

TRANE 2TEE3F49A1000AA 3.5T MULTIPOSITION FAN COIL R22

TRANE 2TEE3F49A1000AA 3.5t MULTIPOSITION FAN COIL R22

TRANE 2TEE3F49A1000AA 3.5Ton MULTIPOSITION FAN COIL R2

TRANE 2TEE3F49A1000AA 3.5ton MULTIPOSITION FAN COIL R2

BLACK BOX SW998A-R2 16 TO 1 SERVMANAGER 159710

JACUZZI B540969 42" x 72" OYSTER WHIRLPOOL BATH 160680

DAYTON 4ZA51A 230 VOLT, 3 HP CENTRIFUGAL PUMP 165130

BLACK BOX LR7001A-25 LASAT SAFEPIPE 25 155280

SMARTVUE S2C4/EU 4MM WIRELESS CAMERA 162957