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1131-3国际标准得到了包括有美国AB公司、德国西门子公司等世界知名大公司在内的众多厂家的共同推动和支持，它极大地改进了工业控制系统的编程软件质量及提高了软件开发效率；它定义的一系列图形化语言和文本语言，不仅对系统集成商和系统工程师的编程带来很大的方便，而且对最终用户同样会带来很大的方便；它在技术上的实现是高水平的，有足够的发展空间和变动余地，使得能很好地适应于下一个世纪。IEC 1131-3标准最初主要用于可编程序控制器（PLCs）的编程系统，但它目前同样也适用于过程控制领域、分散型控制系统、基于控制系统的软逻辑、SCADA等。1131-3国际标准正在受到越来越多的国外公司、厂商的重视和采用，1131-3国际标准因其具有的诸多优点，也正在受到越来越多的国内公司、厂商的重视和采用。
IEC 1131国际标准包括8部分：Part 1: 综述；Part 2: 硬件；Part 3: 可编程语言；Part 4: 用户导则；Part 5: 通信；Part 6:现场总线通信；Part 7:模糊控制编程；Part 8:编程语言的实施方针。IEC 1131-3是IEC 1131中最重要、最具代表性的部分。IEC 1131-3国际标准将是下一代PLC的基础。IEC 1131-5是IEC 1131的通信部分，通过IEC 1131-5，可实现可编程序控制器与其它工业控制系统，如机器人，数控系统，现场总线等的通信。
一、采用IEC 1131-3国际标准的必要性
1． 对系统“开放性”的要求
成熟的工业控制市场已经开始对“开放性系统”产品提出了越来越多的要求，IEC
1131-3国际标准正是适应了这种要求。
2． 传统PLC梯形图编程的缺点
l 不同PLC产品的梯形图符号和编程变化很大。
l 有限的数据封装能力，很难将一个复杂的程序分解为数个简单的程序部分:现在的梯形图编程，一个程序块的内部数据还缺乏对外部隐藏其数据的封装能力，因而，一个大的程序要想分解为几个简单的小程序，并且各个小程序之间具有的清晰的接口是很困难的。
l 有限的程序可重用性：程序可重用性是现在编程的一个发展趋势，传统的PLC不能通过重复调用相同的逻辑策略和算法，实现程序重复使用。
l 不支持数据结构：在许多复杂的应用中，程序需要把一些数据组织成象高级语言PASCAL 、C中的数据结构那样的数据类型，而目前的梯形图程序还不支持数据结构。
l 支持有限的对顺序操作功能编程：传统的PLC梯形图编程对顺序操作的处理方法是，为每一个顺序状态提供一个状态位，这种对顺序操作的处理能力是很有限的。
l 程序执行的局限性：PLC程序是顺序执行的，执行一次程序的时间取决于程序的长短和复杂性，对很大和很复杂的程序，执行一次程序的时间就较长，这对有些对时间有苛刻要求的应用，是有很大的局限性的。
l 执行算术操作的局限性：传统的PLC梯形图程序对算术操作处理是很困难的。
Moeller 0188-0135 Cylinder 0635-H58H - No Box
MOELLER 0117RG39 **NNB**
MOELLER 0.4A, 660V MANUAL MOTOR STARTER PKZM 1-0.4-NA
Moeller 0 to 300 Psi Gage 76526 (U1)
MOELLER ~ PKZM 1–16~16A~660 V~ AC 3~VDE 0660~IEC 157 ~ MOTOR STARTER SWITCH
Moeller / Kloecker Moeller EMR4-F500-2 Phasenfolgerelais
Moeller / Kl?ckner Moeller ZB4-508-KB1 Verbindungskabel
Moeller / Kl?ckner Moeller ZB4-501-IF1 SUConET K-Interface - -
Moeller / Eaton Aufbaugeh?use Geh?use - M22-I6 - 6 Fach - 216540 - NEU & OVP
MOELLER (FAZ-D16/3) D16 16 AMP 15 KA 278896 TRIPLE POLE MCB CIRCUIT BREAKER
MOELLER (FAZ-D10/3) D10 10 AMP 15 KA 278892 TRIPLE POLE MCB CIRCUIT BREAKER
MOELLER (FAZ-C10/3) C10 10 AMP 15 KA 278869 TRIPLE POLE MCB CIRCUIT BREAKER
Moeller (F&G) Fehlerstromschutzschalter F7-63/4/01-A
Moeller (1 Stück) - Leistungsschütz 7,5kW/400V,DC DILM17-10(RDC24) #GR-461-4
Moeller ( EATON ) EMT6 DB 2S Motorschutzrelais Temperaturüberw. AC 230 V in OVP
Moeller ( EATON ) EMT6 DB 2S Motorschutzrelais Temperaturüberw. AC 230 V in OVP
Moeller # PKZMO-1-T Manual Starter Motor Protector
MOELLER - ZB32-2,4 - RELAY, OVERLOAD, FOR DILM17-DILM32
Moeller - X Pole PLSM-D63/3-MW - 63a Type D Triple Pole MCB In Box
Moeller - X Pole PLSM-D6/3-DW - 6a Type D Triple Pole MCB In Box
Moeller - X Pole PLSM-D50/3-MW - 50a Type D Triple Pole MCB In Box
Moeller - X Pole PLSM-D40/3-DW - 40a Type D Triple Pole MCB In Box
Moeller - X Pole PLSM-D25/3-DW - 25a Type D Triple Pole MCB In Box
Moeller - X Pole PLSM-D20/3-MW - 20a Type D Triple Pole MCB In Box
Moeller - X Pole PLSM-D20/3-DW - 20a Type D Triple Pole MCB In Box
Moeller - X Pole PLSM-D10/3-DW - 10a Type D Triple Pole MCB In Box
Moeller - X Pole PLSM-C6/3-DW - 6a Type C Triple Pole MCB In Box
Moeller - X Pole PLSM-C50/3-DW - 50a Type C Triple Pole MCB In Box
Moeller - X Pole PLSM-C25/3-DW - 25a Type C Triple Pole MCB In Box
Moeller - X Pole PLSM-C10/3-DW - 10a Type C Triple Pole MCB In Box
Moeller - X Pole PKS6-40/1N/B/003 - 40a Type B RCBO
Moeller - X Pole PKS6-16/1N/C/003 - 16a Type C RCBO
Moeller - X Pole PKS6-10/1N/B/003 - 10a Type B RCBO
Moeller - X Pole PFIM-100/2/003 - 100a 30mA Type AC Double Pole RCD
MOELLER - TO-2-1/I1/SVB - 3 POLE ENCLOSED ISOLATOR 20A 4KW
MOELLER - T0-2-1/I1H/SVB - ISOLATOR, PLASTIC, ENCL, 20A, 3POLE
MOELLER - T0-2-1/E - MAINS SWITCH, T0-2-1/E
MOELLER - T0-1-102/I1/SVB - SWITCH, PLASTIC, ENCL, 20A, 2POLE
Moeller - Schütz- Hilfschütz
MOELLER - P1-25/I/SVB - 3 POLE ENCLOSED ISOLATOR 5.5KW
MOELLER - Motorschutzschalter - PKZM0-0,63
MOELLER - M22-WRK3+M22-A - ACTUATOR, THUMB, 3WAY
MOELLER - M22-WK+M22-A - ACTUATOR, THUMB, 2WAY
MOELLER - M22-KC10 - ConTACT BLOCK - (Lot of 3 Each - )
MOELLER - M22-KC01 - ConTACT ELEMENT (Lot of 3 Each)
MOELLER - M22-I6 - SURFACE MOUNTING IP66 PUSH BUTTON ENCLOSURE, 6 GANG
MOELLER - M22-I3 - SURFACE MOUNTING IP66 PUSH BUTTON ENCLOSURE, 3 GANG
MOELLER - M22-I3 - SURFACE MOUNTING IP66 PUSH BUTTON ENCLOSURE, 3 GANG
MOELLER - M22-I2 - SURFACE MOUNTING IP66 PUSH BUTTON ENCLOSURE, 2 GANG
MOELLER - Leistungsschalter Motorschutz - NZM7-100N-M8 neu OVP
Moeller - LED- SL-LED grün
Moeller - LED- SL-LED gelb
MOELLER - Haupt-/Not-Aus-Schalter 6P 32A IP65 - T3-4-15682/EA/SVB-SW
MOELLER - Haupt-/Not-Aus-Schalter 6P 32A IP65 - T3-4-15682/EA/SVB-SW
MOELLER - Grundger?t 3p o.Ausl?serblock - PKZ2
MOELLER - FAZ-C16/3 - CIRCUIT BREAKER, 16A, 3POLE
MOELLER - FAZ-C10/1 - CIRCUIT BREAKER, 10A, 1POLE
MOELLER - FAZ-C1/1 - CIRCUIT BREAKER, 1A, 1POLE
Moeller - Eaton Ein-Aus-Schalter P3-63/IVS
Moeller - Eaton Ein-Aus-Schalter P3-63/IVS
MOELLER - EATON DILMC65 ( RDC24 ) LEISTUNGSSCHüTZ SCHUTZE 24-27 V DC 30KW/400V
MOELLER - DILR31 - ConTACTOR - 120V
MOELLER - DILEM-10-G(24VDC) - CONTACTOR, MINI, 4KW
Moeller - DIL2M-G, NDIL2M, FDBDIL Motor Contactor Starter
Moeller - DIL2M Motor Contactor 110V COIL
Moeller - DIL00M-10
MOELLER - Anschlussblock Klemmblock 160A - K95/5
MOELLER - 22DILEM - ConTACT BLOCK, 2NO/2NC
M8-8611ET ROLLER PLUNGER SWITCH replac MOELLER ATO-11-S-I/RS OMRON D4N-4132
M8-8611ET ROLLER PLUNGER SWITCH replac MOELLER ATO-11-S-I/RS OMRON D4N-4132
M8-8611E ROLLER PLUNGER SWITCH replac MOELLER ATO-11-S-I/RS OMRON D4N-4132 AZD1
M8-8611E ROLLER PLUNGER SWITCH replac MOELLER ATO-11-S-I/RS OMRON D4N-4132 AZD1
M8-8608ET ADJUSTABLE ROLLER LEVER SWITCH REPLACES MOELLER ATO-11-S-I/V AZD1008
M8-8608E LIMIT SWITCH 6A REPLACES MOELLER ATO-11-S-I/V
M8-8607ET ADJUSTABLE ROD LEVER SWITCH REPLACES MOELLER ATO-11-S-I/H 6A AZD1007
M8-8607E ADJUSTABLE ROD LEVER LIMIT SWITCH REPLACES MOELLER ATO-11-S-I/H AZD1057
M8-8606ET FLEXIBLE PLASTIC ROD WOBBLE LEVER SWITCH REPLACES MOELLER ATO-11-S-I/F
M8-8606E FLEXIBLE PLASTIC ROD WOBBLE LEVER SWITCH REPLACES MOELLER ATO-11-S-I/F
M8-8604ET ROLLER SHORT LEVER ARM SWITCH REPLACES MOELLER ATO-11-S-I/R D4N-4125
M8-8604E ROLLER SHORT LEVER ARM SWITCH REPLACES MOELLER ATO-11-S-I/R AZD1004
M8-8603ET ONE-WAY ROLLER ARM LEVER VERTICAL SWITCH replac MOELLER ATO-11-S-I/WR
M8-8602ET ONE-WAY ROLLER ARM HINGE LEVER SWITCH replac MOELLER ATO-11-S-I/AR
M8-8601ET PUSH DOME PLUNGER LIMIT SWITCH 6A REPLACES AZD1001 MOELLER ATO-11-S-I
M8-8601ET PUSH DOME PLUNGER LIMIT SWITCH 6A REPLACES AZD1001 MOELLER ATO-11-S-I
M8-8601E PUSH DOME PLUNGER LIMIT SWITCH 6A REPLACES D4N-4131 MOELLER ATO-11-S-I
M8-8601E PUSH DOME PLUNGER LIMIT SWITCH 6A REPLACES D4N-4131 MOELLER ATO-11-S-I
M22-WRS3 +M22-A Moeller - M22-Wrs3 +M22-A - Actuator , Keyswich , 3Way
M22-WRS+M22-A Moeller - Actuator , Keyswich , 2Way
M22-WRLK-R+M22-A - EATON MOELLER - ACTUATOR, RED, 2WAY
M22PVLM22AM22XAK Moeller Switch , Pushbutton , Estop , 90mm Lbl
M22-PV+M22-A+M22-XAK Moeller - Switch , Pushbutton , Estop , 90mm Lbl
M22-PV/KC11/IY Moeller Enclosure , Estop Pushbutton
M22-DRP-R+M22-A Moeller - M22-Drp-R+M22-A - Switch , Pushbutton , Mushroom , Red
M22-DRL-Y+M22-A Moeller - Switch , Pushbutton , Illum , Yellow
M22-DRL-B+M22-A - EATON MOELLER - SWITCH, PUSHBUTTON, ILLUM, PROG, BLUE
LV6 Kl?ckner Moeller SPS EBE231 B EBE 231
Lot of 9 Moeller X Pole PLSM-C16/1-AS 1P Circuit Breakers
LOT OF 8 MOELLER EK10 AUXILIARY ConTACT 600VAC * *
LOT OF 7: Klockner Moeller DIL R 40 Contactors + Auxiliaries 22DIL,04DIL,40DIL
LOT OF 7 MOELLER FAZ-2-C6 CIRCUIT BREAKER * OUT OF A BOX*
LOT OF 6 MOELLER 0117-RG87 PUNCHES RND 20 DIA X 25, P=9.58 B=12 P/S
LOT OF 6 KLOCKNER MOELLER BREAKER FAZNC4-2 TWO POLE 277/480VAC
Lot of 6 Moeller Manuel Starters PKZM 1-1,6
LOT OF 6 MOELLER 04DIL MINIATURE ConTACTOR * *
LOT OF 5 MOELLER M22-KC01 ConTACT BLOCK * *
LOT OF 5 KLOCKNER-MOELLER RWK3R SELECTOR SWITCH * IN A BOX*
LOT OF 5 KLOCKNER-MOELLER AD-E ADAPTER EXTENSION PIECE * IN A FACTORY BAG*
LOT OF 5 KLOCKNER-MOELLER 40DIL SMALL ConTACTOR * *
LOT OF 5 KLOCKER MOELLER EFC * OUT OF BOX*
LOT OF 4: Klockner Moeller DIL R 40 + 22 DIL M + 04 DIL Contactor, Relay
LOT OF 4 MOELLER FAZN B6 CIRCUIT BREAKER * OUT OF A BOX*
LOT OF 4 MOELLER 20DIL AUXILIARY ConTACT BLOCK * IN A BAG*
LOT OF 4 MOELLER 11DILM AUXILIARY ConTACTS * *
LOT OF 4 KLOCKNER-MOELLER RWK3R SELECTOR SWITCH * IN A BOX*
LOT OF 4 KLOCKNER-MOELLER EZ1 THERMAL OVERLOAD RELAY ACCESSORIES * *
LOT OF 4 KLOCKNER MOELLER NHi11-PKZM1 * IN BOX*
LOT OF 4 KLOCKNER MOELLER FAZN B10 * *
Lot of 4 Klockner Moeller DIL R 40-G Contactor Relays w/ VG B DIL 24 Suppressor
Lot Of 3 Klockner Moeller Pkzm3-U-Na Manual Motor Starter
Lot of 3 Moeller Track Mounted Breakers (See Add. Info for Specs)
LOT OF 3 MOELLER FAZ-C10 CIRCUIT BREAKER * OUT OF A BOX*
LOT OF 3 MOELLER FAZ-3-C20 CIRCUIT BREAKER * OUT OF A BOX*
LOT OF 3 MOELLER FAZ-2-C4 CIRCUIT BREAKER * OUT OF A BOX*
Lot of 3 Moeller FAZ-2 S10 10 Amp Breaker Switches
LOT OF 3 MOELLER DILEM-10-G ConTACTORS 15AMP DILEM10G
Lot of 3 Moeller DIL EM4-G Contactor 4 Pole 24VDCCoil 15A 400V VAC 4kW
LOT OF 3 MOELLER BFT 125/6 * OUT OF A BOX*
LOT OF 3 MOELLER 31DILM MINIATURE ConTACTOR * IN A BAG*
LOT OF 3 MOELLER 13 DIL MINIATURE ConTACTOR 13-DIL 13DIL
LOT OF 3 KLOCKNER-MOELLER 20DIL AUXILIARY ConTACT MODULE * IN A BOX*
LOT OF 3 KLOCKNER MOELLER SELECTOR SWITCH RWK3R * IN BOX*
LOT OF 3 KLOCKNER MOELLER HI11-P1/P3 AUX. SWITCH * IN BOX*
LOT OF 3 KLOCKNER MOELLER FAZ-S6 SUPPLEMENTARY PROTECTORS, 230/415 V, FAZS6
LOT OF 3 KLOCKNER MOELLER DIL 00M-10 ConTROL (300)
LOT OF 3 KLOCKNER MOELLER ConTACTOR 11 DIL EM * OUT OF BOX*
Lot of 3 Klockner Moeller Circuit Breakers FAZN C20-2 / FAZN C40-3 / 20A / 40A
LOT OF 3 - KLOCKNER MOELLER DIL R 31 Contactor 500V~/600V 10A
LOT OF 2 MOELLER DILM17-10 Contactor DILM1710 DILM17
LOT OF 2 MOELLER PROTECTOR FAZ/FIP-XHI11 * OUT OF BOX*
Lot Of 2 Moeller PKZM0-6.3 Manual Motor Starter Switch/CircuitBreaker Ser. No 04
Lot of 2 Moeller PKZM0-10/PKZM0-4 Motor Protector Circuit Breakers
Lot of 2 MOELLER P1-25 SWITCH 3 PHASE
Lot of 2 Moeller LS-11 Plunger Roller Mechanical Limit Switches
LOT OF 2 MOELLER LAMP MODULE M22-CLED-R (RED) * OUT OF BOX*
LOT OF 2 MOELLER LAMP MODULE M22-CLED-B (BLUE) * OUT OF BOX*
LOT OF 2 MOELLER LAMP MODULE M22-CLED230-G (GREEN) * OUT OF BOX*
LOT OF 2 MOELLER DP-M22-DL-W ILLUMINATOR * IN BOX*
Lot of 2 Moeller DILM820-XHI11-SI Contact Block
Lot of 2 Moeller DILM1000-XHl11-Sl Contact Block
LOT OF 2 MOELLER DIL00M ConTACTOR RELAYS DIL-00M
LOT OF 2 MOELLER 13DIL MINIATURE ConTACTOR * IN A BAG*
LOT OF 2 KLOCKNER-MOELLER FAZ-2-S2 CIRCUIT BREAKER * IN A BOX*
Lot of 2 Klockner-Moeller DIL08-53 RELAY
LOT OF 2 KLOCKNER MOELLER U-PKM0 * IN A BOX*
Lot of 2 Klockner Moeller S2 Mounting Bracket Old Stock Box
LOT OF 2 KLOCKNER MOELLER PKM0-2,5 *NICE*
LOT OF 2 KLOCKNER MOELLER ConTACT BLOCK K-NA * OUT OF BOX*
LOT OF 2 KLOCKNER MOELLER ConTACT BLOCK K-NA * OUT OF BOX*
Lot of 18 KLOCKNER MOELLER F CONTACT
Lot of 15) Moeller RLF-GE Orange Indicating Pilot Light Push Button +Priority SH
Lot of 15) Moeller RLF-GE Orange Indicating Pilot Light Push Button +Priority SH
Lot Of 11 Moeller FAZ Circuit Breaker 1 pole
Lot Of 10 Moeller Punches 1291-0313
Lot of (4) Klockner-Moeller RT110 RP-RTX Industrial Red Stop Push Button
Lot of (4) Klockner Moeller Sector Switch RWK3R NNB + Free Priority Shipping!!!
Lot of (4) Klockner Moeller Sector Switch RW1R with BE3 Adapter Mounting Bracket
Lot of (4) Klockner Moeller Red Emergency Industrial Stop Push Button NNB
Lot of (4) Klockner Moeller RDH-9RT110 Red Emergency Stop Push Button
Lot of (4) Klockner Moeller RDH-9RT110 Red Emergency Stop Push Button
LOT OF (4) KLOCKNER MOELLER ConTACT BLOCK ASSEMBLIES 1 N.O. 1 N.C. MODEL BK11