北京市E4809-770-079

E4809-770-079联系人：傅工 手机：18030132582 QQ：1506179174我的优势：“专业、诚信、创新、合作、共赢”的经营理念、不断开发新产品
[仲鑫达]备件DCS PLC系统模块备件,用于集散控制系统，可编程控制器，面板控   制器和驱动器。包括以下产品。
BOSTON F732-15-B9-J GEAR REDUCER INPUT HP 3.590 RATIO 1...
 
EGS HEVI-DUTY TRANSFORMER CAT# TSH30S , 30KVA NEW
 
KINNEY MDO: KLRC-40-S LIQUID RING PUMP REBUILT OLD STOC...
 
GASTRONICS CONTROL IN HOFFMAN ENCLOSURE - #A-161608LP -...
 
CUTLER HAMMER AF95 ADJUSTABLE FREQUENCY DRIVE ,USED
 
ALLEN-BRADLEY 1305 DRIVE - CAT#1305-BA04A - USED

1、PLC程序的经验设计法 在PLC发展的初期，沿用了设计继电器电路图的方法来设计梯形图程序，即在已有的些典型梯形图的基础上，根据被控对象对控制的要求，不断地修改和完善梯形图。有时需要多次反复地调试和修改梯形图，不断地增加中间编程元件和触点，最后才能得到一个较为满意的结果。这种方法没有普遍的规律可以遵循，设计所用的时间、设计的质量与编程者的经验有很大的关系，所以有人把这种设计方法称为经验设计法。它可以用于逻辑关系较简单的梯形图程序设计。 用经验设计法设计PLC程序时大致可以按下面几步来进行：分析控制要求、选择控制原则；设计主令元件和检测元件，确定输入输出设备；设计执行元件的控制程序；检查修改和完善程序。 2、经验设计法的特点 经验设计法对于一些比较简单程序设计是比较奏效的，可以收到快速、简单的效果。但是，由于这种方法主要是依靠设计人员的经验进行设计，所以对设计人员的要求也就比较高，特别是要求设计者有一定的实践经验，对工业控制系统和工业上常用的各种典型环节比较熟悉。经验设计法没有规律可遵循，具有很大的试探性和随意性，往往需经多次反复修改和完善才能符合设计要求，所以设计的结果往往不很规范，因人而异。 经验设计法一般适合于设计一些简单的梯形图程序或复杂系统的某一局部程序（如手动程序等）。如果用来设计复杂系统梯形图，存在以下问题：    1)．考虑不周、设计麻烦、设计周期长   用经验设计法设计复杂系统的梯形图程序时，要用大量的中间元件来完成记忆、联锁、互锁等功能，由于需要考虑的因素很多，它们往往又交织在一起，分析起来非常困难，并且很容易遗漏一些问题。修改某一局部程序时，很可能会对系统其它部分程序产生意想不到的影响，往往花了很长时间，还得不到一个满意的结果。   2)．梯形图的可读性差、系统维护困难 用经验设计法设计的梯形图是按设计者的经验和习惯的思路进行设计。因此，即使是设计者的同行，要分析这种程序也非常困难，更不用说维修人员了，这给PLC系统的维护和改进带来许多困难。

 
COPELAND KAL-0100-TAC REFRIGERATION COMPRESSOR REMANUFA...
 
GENERAL ELECTRIC TRANSFORMER - #9T51B0135 - NIB
 
AKG THERMAL SYSTEM OIL COOLER - #C66-38259 - NEW
 
SIEMENS MFC3M700 700 AMP SENTRON CIRCUIT BREAKER ,NIB(B...
 
LIGHTNIN?, 52638, PROPELLER, NEW
 
US MOTORS F-3488-00-185 ELECTRIC MOTOR, 3HP, 3450RPM, 8...
 
CURTIS D97 27A-9104 AIR COMPRESSOR w/ MOTOR AND TANK U...
 
ALLEN-BRADLEY 2098-DSD-HV100-?SE 3000 KINTEX 3 PH CONTRO...
 
WARREN RUPP SANDPIPER SIFB1AGTANS100 DIAPHRAGM PUMP USE...
 
PERMCO ? NO TAG HYDRAULIC PUMP 13 SPLINE USED
 
HUB CITY MODEL # 66 1/1 RATIO GEAR REDUCER NEW OLD STOC...
 
GENERAL ELECTRIC 1200 AMPS TPR6612 POWER BREAK, USED
 
TOSHIBA VT130E3U2035 TRANSISTOR INVERTER ,USED
 
LIGHTNIN MIXER MOTOR - #V76R4575NZJ - USED
 
SEW EURODRIVE MOTOR # DFT90S4BMG2HR , 1.5H.P. 1740 R.P...
 
TIGEAR MR94651L1 GEAR REDUCER w/MOTOR 40:1 RATIO USED
 
WORTHINGTON C1-INT 1750RPM INGERSOLL-RAND DRESSER PUMP
 
YAMADA ALUMINUM DIAPHRAGM PUMP # NDP/5DBAN 2'' USED
 
SEW-EURODRIVE SF32D17IC4 GEAR REDUCER w/MOTOR, RATIO:24...
 
SIEMENS 6ES5441-4UA14 DIGITAL OUTPUT MODULE ,NIB(BD)
 
FOXBORO 8000A SERIES MAGNETIC FLOWTUBE 801EA-WCR-PJGF8?G...
 
2pcs ALLEN-BRADLEY 1606-XL 240DR XC POWER SUPPLY USED
 
ALLEN-BRADLEY 20A D 022 A 0 AYNANNN POWERFLEX 70 DRIVE ...
 
CANADIAN GENERAL ELECTRIC 1F3256P 10HP INDUCTION MOTOR ...
 
GODURIN HL-5 CENTRIFUGAL PUMP w/ 6CYL. DEUTZ DIESEL MOT...
 
RELIANCE ELECTRIC ID: P25G4902 DC EOMASTER ENERGY EFFIC...
 
GRACO GLUTTON P/N 220-666 DIAPHRAGM PUMP USED
 
BRIDGED CRANE DRIVE CAST : U16-024 USED NO TAG
 
RELIANCE P18G4268 2HP 3PH. MOTOR ,NEW
 
THREAD CRAFT 4-00200-26988 BALL SCREW NEW
 
N-TRON 5487X CONTROLLER - #508TX - USED
 
20TH CENTURY MACHINES 19185 BALL SCREW NEW
 
BOSTON GEAR ? HOD-B140TC GEAR REDUCER RATIO 57.273:1 NE...
 
CUTLER HAMMER E 20Y01B5 2 POS. ON OFF HAND SWITCH ,NIB
 
SIEMENS 125A METER/MAIN BREAKER COMBINATION - #MM0202ML...
 
BALDOR MOTOR w LUBRICATOR PUMP 115/208-230V HP1/4 5/2.7...
 
OHIO GEAR UNILINE 2000 GEAR REDUCER, RATIO: 5-C, USED
 
ENTERTRON INDUSTRIES ROADRUNNER SK1800-R CONTROLLER USE...
 
ROSEMOUNT 644HANAF6Q4 HART SMART FAMILY TEMPERATURE TRA...
 
KRATOS FS 970M-A1 GM970 MONOCHROMATER , USED
 
ALLEN-BRADLEY 2711-KC1 PANELVIEW 1200 TERMINAL USED
 
DAYTON INDUSTRIAL MOTOR - MODEL# 3KW98G - USED
 
GROVE GEAR BM224-3 GEAR REDUCER, RATIO:40-1, NEW
 
32 pcs ALLEN-BRADLEY MISC. PARTS NEW OLD STOCK
 
WELCH SCIENTIFIC COMPANY 1402 DUO SEAL VACUUM PUMP USED
 
JOHN BEAN MOD: 35 TRIPLEX PISTON PUMP USED
 
LEESON 150157-60 7.5 HP 3PH. MOTOR ,USED
 
COPELAND M4PH-A035-IAA-1?41 REFRIGERATION UNIT NEW
 
HUB CITY 88 2/1 REDUCER ,NEW OLDSTOCK
 
ABB VR4333150013A2E?C1A9 TRIO-WIRL TRANSMITTER 14-46VDC ...
 
THREAD CRAFT, 4006003501, BALL SCREW, NEW
 
OHIO GEAR B-175 GEAR REDUCER 20 TO 1 RATIO NEW OLD STOC...
 
FALK 1206WB3A GEAR REDUCER HP.491 RATIO 60:1 SURFACE RU...
 
ALLEN-BRADLEY 2094-AMP5 KINETIX 6000 SERVO DRIVE 200/23...
 
ALLEN BRADLEY 6185-CACABBR INDUSTRIAL COMPUTER USED
 
HYTROL 4M GEAR REDUCER W/ BALDOR MOTOR USED
 
ROSEMOUNT CAL# 099780560993800?5 MAGNETIC FLOWTUBE NEW I...
 
DODGE / TIGEAR M053549005SR079?16150KC GEAR REDUCER RATI...
 
TUTHILL 3202-81L3 ROTARY LOBE BLOWER ,USED TURNS
 
AURORA 8 X10 15 B TYPE 411 BF SPLIT CASE CENTRIFUGAL PU...
 
CUTLER HAMMER IS905 ADJUSTABLE FREQUENCY DRIVE ,USED
 
SYNTRON MAGNETIC VIBRATORY FEEDER 115VOLT TYPE : PMF272...
 
LELAND FARADAY AEE LFI-3075 7.5 HP 3PH. ELECTRIC MOTOR ...
 
MURRAY JA2040B1200 200 AMP RAINPROOF COMBINATION METER...
 
SIEMENS 1P6ES7321-1BH02?-0AA IO MODULE NEW
 
6 pcs ALLEN BRADLEY SCANNER MODULES 1747-SN USED
 
VILTER SIZE: A..K454XL AMMONIA REFRIGERATION COMPRESSOR...
 
HOFFMAN A-161608LP NEMA TYPE12 ENCLOSURE w/ GASTRONICS ...
 
RELIANCE ELECTRIC 10316926-VB 30:1 GEAR REDUCER w/ 1/2 ...
 
HYPRO POWER PLUS MOD: 2345B-P TRIPLEX PISTON PUMP AND M...
 
MURRAY OUTDOOR LOAD CENTER - CAT#LW1224L1125 - NIB
 
REXROTH ? NO TAG BALL SCREW NEW
 
GOULDS WS1034BF SUBMERSIBLE SEWAGE PUMP , USED
 
4pcs MEAD H-42 AIR CLAMP NEW
 
2pcs SIEMENS 1P6ED1052-2FBOO?-0BA6 LOGIC MODULES NIB
 
SIEMENS JXD62B400 400 AMP CIRCUIT BREAKER 2 POLES NEW ...
 
ALLEN-BRADLEY 1756-A13 / CHASSIS 13-SLOT RACK w/KEY USE...
 
SIEMENS 6RA7018-6FS22-0?-Z DC MASTER DC CONVERTER ,NEW
 
LIGHTNIN V5P18 VEKTOR MIXER ,USED
 
SIEMENS 6ED1052-2HB00-0?BA6 LOGO LOGIC MODULE, NIB
 
NASH / ELMO L-300 2BV5161-OKH02-5?S-Z VACUUM PUMP NEW
 
ZENITH NICHOLS QM PRECISION METERING SYSTEM, USED
 
ROLLER STATOR / HYDRO POWER 26857 HYDRAULIC MOTOR USED
 
MICROMOTION 2700R12BDUEZZZ TRANSMITTER s/n 3118021 USED
 
ELECTRIC HEATER CO. GLO-QUARTZ RWS-11520XE2-T1?B HEATING...
 
VECTOR SYSTEM 3365 AQUEOUS AMMONIA STORAGE TANK
 
OHIO GEAR UNILINE 2000 GEAR REDUCER, RATIO: 20/1, NEW w...
 
ALLEN-BRADLEY 1746-A10 10-SLOT RACK w/ POWER SUPPLY AND...
 
SIEMENS NO#1P-6SE6430-8?DAO MICROMASTER 430, NEW IN BOX
 
SIEMENS 3R10756....6 CONTACTOR ,NEW
 
SIEMENS 3R10756....6 CONTACTOR ,NEW
 
CONTROL TECHNIQUES MENTOR II DIGITAL DC DRIVE 50H.P. , ...
 
GAST ? 8L29 0700 PUMP w/ 1/6 HP MOTOR , REBUILT
 
ABB ACS501-040-4-00?P2 40/50 HP DRIVE ,USED
 
BODINE ELECTRIC GEAR MOTOR - #42A7BEPM-5R - NEW
 
FENNER TYPE: 872G1390C SHAFT MOUNT GEAR REDUCER RATIO 4...
 
TC THREAD-CRAFT 4-0000.26989 BALL SCREW NEW
 
LOT OF 2pcs. LEPEL 19140923 LEPAK TR2000 INDUCTION CAP ...
 
MATHIS LPE 13596 LABATORY MIXER ,USED
 
SIEMENS W0816B1200CT 200AMP OUTDOOR MAIN BREAKER NEW IN...
 
FISHER / BAUMANN 2" 150 24588C WCC CONTROL VALVE W/ POS...
 
BOSTON GEAR F715-50S-B5-J GEAR REDUCER, RATIO: 50-1, US...
 
2pcs. LONERGAN D10J-S4 2X3 STAINLESS STEEL SAFETY RELI...
 
LEYBOLD TURBOSTREAM TURBORADIAL BLOWER TYPE S1500SN NEW...
 
LIGHTNIN 271611 VEKTOR MIXER ,USED
 
BROOKS MAG 7404D5A1N4AGAA MAGNETIC FLOWTUBE 740 PRESS P...
 
C&M CYCLONE 648 SER. 1 TON LOW HEAD ROOM TROLLEY HOIST ...
 
WALLACE & TIERNAN P75MPH3XAKTT1AX?X SOLENOID METERING PU...
 
BJM J22 SUBMERSIBLE PUMP 3HP NEW IN BOX
 
FISHER CONTROL VALVE W/ ACTUATOR SIZE 30 USED
 
ALLEN-BRADLEY 1746-A13 13 SLOT RACK w/ RACK INTERNET CA...
 
MAXWELL MICROSYSTEMS 4001 OPERATOR INTERFACE PANEL NEW
 
RELIANCE ELECTRIC M05210300ZP0791?63-20AN SPEED REDUCER ...
 
VOLLRATH EWTHV0.5 HARDNESS TESTER , USED
 
SEW EURODRIVE GEAR REDUCER REDUCER # DF16HSBDT80K4-K?S N...
 
COPELAND M4PH-0028-1AZ-3?40 REFRIGERATION COMPRESSOR UNI...
 
RIDGID 300 PIPE THREADER UNIT ,USED
 
TOSHIBA VT130E3U2035 3HP ADJUSTABLE SPEED DRIVE ,USED
 
RELIANCE 5 HP, 215 FRAME ELECTRIC AC MOTOR, REBUILT
 
15 pcs BLACKHAWK PIPE BENDER WITH RAM AND SHOES NO TAG ...
 
VICKERS 02144017 DG4S2-012A-H-60?-LH HYDRAULIC PILOT VAL...
 
DAYTON INDUSTRIAL MOTOR - MODEL# 3KW98G - USED
 
SHIMPO CIRCULUTE SPEED REDUCER # C07-59C140BHRAT?IO 59:1...
 
DODGE TDT4 TORQUE ARM SPEED REDUCER USED
 
THERN INC. 483A1 WINCH 1/2C w/ ELECTRIC MOTOR, USED
 
BAUMANN L50349 1 1/2" CONTROL VALE w/ ACTUATOR AND POSI...
 
GENERAL ELECTRIC 5KS145SAB220 2 HP AC MOTOR ,NIB(BD)
 
CARLYLE MF3463HB REFRIGERATION COMPRESSOR ,NEW
 
FISHER 2" EZ CL150/285 CWP CONTROL VALVE NEW
 
3 pcs STERLING 3X4 TYPE: ZTND-080200 CENTRIFUGAL PUMPS ...
 
BOSTON GEAR REDUCER 718-15-G RATIO 15:1 NEW
 
WHITE? 15G3N HYDRAULIC MOTOR USED
 
HUSKY DK3GGG 3" ALUM. DIAPHRAGM PUMP, USED
 
TIGEAR 791612ASMR94751 GEAR REDUCER 1.42HP RPM1750 TURN...
 
MAKISHINKO MOD# SB25 GEAR BOX RATIO 1:1 NEW
 
TOSHIBA VT130E3U2035 TRANSISTOR INVERTER/SPEED DRIVE US...
 
SIEMENS 6ES7 650-0LF16-0YX1 SIMATIC RACK PLC, NEW
 
DODGE TIGEAR 2 GEAR REDUCER # 26S40R , RATIO 40:1 NEW