描述

iXT7A

編程語(yǔ)言的形式
本教材采用最常用的兩種編程語(yǔ)言，一是梯形圖，二是助記符語(yǔ)言表。采用梯形圖編程，因?yàn)樗庇^易懂，但需要一臺(tái)個(gè)人計(jì)算機(jī)及相應(yīng)的編程軟件；采用助記符形式便于實(shí)驗(yàn)，因?yàn)樗恍枰慌_(tái)簡(jiǎn)易編程器，而不必用昂貴的圖形編程器或計(jì)算機(jī)來(lái)編程。
雖然一些高檔的PLC還具有與計(jì)算機(jī)兼容的C語(yǔ)言、BASIC語(yǔ)言、專用的高級(jí)語(yǔ)言（如西門子公司的GRAPH5、三菱公司的MELSAP），還有用布爾邏輯語(yǔ)言、通用計(jì)算機(jī)兼容的匯編語(yǔ)言等。不管怎么樣，各廠家的編程語(yǔ)言都只能適用于本廠的產(chǎn)品。
l 編程指令：指令是PLC被告知要做什么，以及怎樣去做的代碼或符號(hào)。從本質(zhì)上講，指令只是一些二進(jìn)制代碼，這點(diǎn)PLC與普通的計(jì)算機(jī)是完全相同的。同時(shí)PLC也有編譯系統(tǒng)，它可以把一些文字符號(hào)或圖形符號(hào)編譯成機(jī)器碼，所以用戶看到的PLC指令一般不是機(jī)器碼而是文字代碼，或圖形符號(hào)。常用的助記符語(yǔ)句用英文文字（可用多國(guó)文字）的縮寫及數(shù)字代表各相應(yīng)指令。常用的圖形符號(hào)即梯形圖，它類似于電氣原理圖是符號(hào)，易為電氣工作人員所接受。
l 指令系統(tǒng)：一個(gè)PLC所具有的指令的全體稱為該P(yáng)LC的指令系統(tǒng)。它包含著指令的多少，各指令都能干什么事，代表著PLC的功能和性能。一般講，功能強(qiáng)、性能好的PLC，其指令系統(tǒng)必然豐富，所能干的事也就多。我們?cè)诰幊讨氨仨毰錚LC的指令系統(tǒng)
l 程序：PLC指令的有序集合，PLC運(yùn)行它，可進(jìn)行相應(yīng)的工作，當(dāng)然，這里的程序是指PLC的用戶程序。用戶程序一般由用戶設(shè)計(jì)，PLC的廠家或代銷商不提供。用語(yǔ)句表達(dá)的程序不大直觀，可讀性差，特別是較復(fù)雜的程序，更難讀，所以多數(shù)程序用梯形圖表達(dá)。
l 梯形圖：梯形圖是通過連線把PLC指令的梯形圖符號(hào)連接在一起的連通圖，用以表達(dá)所使用的PLC指令及其前后順序，它與電氣原理圖很相似。它的連線有兩種：一為母線，另一為內(nèi)部橫豎線。內(nèi)部橫豎線把一個(gè)個(gè)梯形圖符號(hào)指令連成一個(gè)指令組，這個(gè)指令組一般總是從裝載（LD）指令開始，必要時(shí)再繼以若干個(gè)輸入指令（含LD指令），以建立邏輯條件。最后為輸出類指令，實(shí)現(xiàn)輸出控制，或?yàn)閿?shù)據(jù)控制、流程控制、通訊處理、監(jiān)控工作等指令，以進(jìn)行相應(yīng)的工作。母線是用來(lái)連接指令組的。下圖是三菱公司的FX2N系列產(chǎn)品的最簡(jiǎn)單的梯形圖例：

產(chǎn)品承諾：
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢(shì)價(jià)格，大量現(xiàn)貨。

主營(yíng)DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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Heraeus V?tsch VMS 2/08/22/125 -70°C – +220°C Schock

BAASEL Lasertech LTI 2003 Laser Beschriftungsla?ser

ABB C5 Roboter HOLLOW WRIST 3HNA-003869-001

DuPont Sorvall RC-28S Centrifuge 28000 U/min inkl Rotor

Sorvall Discovery 90 Centrifuge 90000 U/min inkl Rotor

Sorvall RC 5C Centrifuge 21000 U/min -20°C- + 40°C

Lloyd Doyle AOI AOT 5000 X2 TT Excalibur Twin Table

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Branson 901 AES Actuator Ultraschallschw?ei?ger?t

Fanuc AC-Spindle Servo Unit A06B-6044-H017 Top Zustand

Perkin Elmer Packard Multi Probe II EX LIQUID HANDLING

WEISS WETK0130.S Incubator W?rmeschrank 0…60°C

Perkin Elmer Packard Multi Probe II EX LIQUID HANDLING

INDRAMAT Mainspindle RAC 3.1-150-460-A0I?-W1-220 NEU

Fanuc Amplifier Alpha A06B-6154-H100#?H590 110kW NEU

Siemens Sinumerik NCU 573.5 6FC5357-0BB35-0?AA0 Ver. G

INDRAMAT Mainspindle RAC 3.5-150-460-A0I?-Z1-220

Siemens Simatic S5 CPU948 6ES5948-3UA21 6ES5-948-3UA21

FANUC Series 310i Panel A08B-0086-D413 + A08B-0086-B732

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Siemens Sinumerik NCU 730.1 6FC5373-0AA00-0?AA0 Vers. A

FANUC Series 310i Panel A08B-0086-D413 + A13B-0199-B732

Siemens Sinumerik Sirotec ACR20 6FR4200-0AC01-0?AA0 KUKA

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Siemens Simodrive 611 6SN1123-1AA00-0?KA0 400A

Siemens Simatic S5 CPU948 6ES5948-3UA12 6ES5-948-3UA12

Siemens Simatic Panel PC 677 12″ 6AV7661-1AA10-4?BS0 NEU

Siemens Sinumerik NCU 573.4 6FC5357-0BB34-0?AE0 650Mhz

Siemens Karte S30861-U4266-X-?C4/01 Cat40-4-8FV1 NEU

Siemens Karte S30861-U4266-X-?C4/01 Cat40-4-8FV1 NEUWER

Siemens Simatic Panel PC FI45 V2 6AV7605-1AE23-0?CB2

FANUC AC Spindle Motor Control Unit A06B-6064-H308#?H550

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FANUC Basic Unit LCD Series 18i-MB5 A02B-0297-B502

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Siemens Sinumerik NCU 720.1 6FC5371-0AA00-0?AA0 Vers. C

Siemens Sinumerik NCU 720.1 6FC5372-0AA00-0?AA0 Vers. D

BOSCH Pressenspindel + Pressensteuerun?g PE 100 50kN

Indramat Rexroth IndraControl VDP40 1BIN-G4-PS-NN VAM40

Siemens Simatic PC IL77 IL-77 6AG7102-0AA00-1?AC0 Top

Siemens Sinamics Single 6SL3120-1TE28-5?AA3 85A Vers. A

Fanuc Alpha Spindle Servo Unit A06B-6064-H306#?H550

Siemens Simodrive Simovert 610 6SC6901-2AA00-Z NEU OVP

Matrix VisionMate96 Plus 2-D Barcode Reader Vision Mate

Siemens Simadyn D 6DD1670-0AF0 Operator Panel OP1

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Siemens Simatic Operator Panel OP35 6AV3535-1TA01-0?AX0

Siemens Sinumerik 6FC3988-7FB20 + 6FC3985-7AU20
inkl. 6EW1861-3AB + 6FX1120-4BD03 + 6FX1126-1AA03

Siemens Simatic PC IL70 IL-70 6AG7011-0AA00-0?AE0 Top

Siemens Simatic Operator Panel OP35 6AV3535-1FA01-0?AX0

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Siemens Simatic Operator Panel OP35 6AV3535-1FA01-0?AX0

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ABB C5 Roboter Card APMDC-03 E3E032071 E-32071

ABB C5 Roboter Motor Unit Servo 2 3R022080

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Siemens Simatic Multi Panel MP270 6AV6542-0AB15-1?AX0

SEW MOVIDRIVE MDV60A0300-503-?4-00 41,kVA 30kW NEU OVP

SORVALL Ultra Rotor TFT 50.38 50000 RPM U/min Zentrifug

INDRAMAT AC-Servo Controller TDA 1.1-100-3-A0I

Indramat Rexroth MTX VPP40 IndraControl VPP 40 NEU

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Forma Scientific Bio- Freezer Model 8425 -70°C

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ABB CPU Board DSQC 230 3E041456 E3E041456 NEU

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INDRAMAT Servo Controller DDS02.1-W025-DA?02-01-FW NEU

INDRAMAT AC-Servo Power TVD1.2-15-03 TVD-1.2-15-03

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ABB BBC Veritron Doppelstromrich?ter ADS Umrichter

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iXT7A

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