5SDA11D1702
PLC是專為工業(yè)控制而開(kāi)發(fā)的裝置,其主要使用者是工廠廣大電氣技術(shù)人員,為了適應(yīng)他們的傳統(tǒng)習(xí)慣和掌握能力,通常PLC不采用微機(jī)的編程語(yǔ)言,而常常采用面向控制過(guò)程、面向問(wèn)題的“自然語(yǔ)言”編程。電工委員會(huì)(IEC)1994年5月公布的IEC1131-3(可編程控制器語(yǔ)言標(biāo)準(zhǔn))詳細(xì)地說(shuō)明了句法、語(yǔ)義和下述5種編程語(yǔ)言:功能表圖(sequential function chart)、梯形圖(Ladder diagram)、功能塊圖(Function black diagram)、指令表(Instruction list)、結(jié)構(gòu)文本(structured text)。梯形圖和功能塊圖為圖形語(yǔ)言,指令表和結(jié)構(gòu)文本為文字語(yǔ)言,功能表圖是一種結(jié)構(gòu)塊控制流程圖。
梯形圖是使用得zui多的圖形編程語(yǔ)言,被稱為PLC的*編程語(yǔ)言。梯形圖與電器控制系統(tǒng)的電路圖很相似,具有直觀易懂的優(yōu)點(diǎn),很容易被工廠電氣人員掌握,特別適用于開(kāi)關(guān)量邏輯控制。梯形圖常被稱為電路或程序,梯形圖的設(shè)計(jì)稱為編程。
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WHITE-RODGERS 70-903 CONTACTOR 24V
WHITE-RODGERS 90-342 RELAY 208/240V (AS PICTURED-SIDE BENT)
WHITE-RODGERS AUTOMATIC PILOT 30A46-5
WHITMAN 68060-06 MODEL P88G-4-C15TS PRESSURE SWITCH 3-40PSI
WIEDENBACH CPU105-5
WIEDMULLER 919764
WIELAND 70.310.1640 CONNECTOR
WIKA 013251959 PRESSURE GAUGE 0-2300 PSI
WIKA 111.10 2.5" GAUGE 60PSI 1/4"NPT LM
WIKA 212.54 4" 30INHG VAC 1/4" NPT LM PRESSURE GAUGE 4211944
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WIKA -30in.Hg-0 PRESSURE GAUGE 1493132
WIKA 4265926 TYPE 111.10 4" GAUGE -30-0-30 PSI
WIKA 50398083 TRANSDUCER
WIKA DIGITAL DISPLAY CONTROL 907.01.2083
WIKA GAUGE 0-1,0 BAR
WIKA GAUGE 4253311
WILBAC 18860 PANEL METER 0-200
WILBAC 3-1/2" PANEL METER 0-300AMPS 18395
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5SDA11D1702
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WINSMITH 924MDSS524X0D4 GEAR REDUCER
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WINTERBURN CI2120A1 TYPE B SPEED SWITCH *FACTORY SEALED*
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WIRE WIZARD FC-X
WIRE, THERMOCOUPLE J TYPE KNP0090
WIREMOLD 2344-2 DEVICE BOX
WIT INC INTERNATIONAL EGS-2
WITTENSTEIN ALPHA LP 120-M01-10-111-000 PLANETARY GEARHEAD REDUCER
WITTENSTEIN LP 090-MO1-5-111-000 GEAR BOX PLANETARY RATIO
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WITTENSTEIN SP 100W-MF1-10-1E1-2S GEARHEAD
WITTENSTEIN SP 140S-MF1-10-0K1-2S
WITTENSTEIN TLSA046AAQ-305B01-001 LINEAR CYLINDER TERNERY ACTUATOR *NIB*
WITTENSTEIN TLSA046AAQ-305B01-005 LINEAR CYLINDER
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WLK7 MECHANICAL COUPLING LINK
WOODHEAD 130KA
WOODS WFC4001-OC
WOODWARD 5441-611 A AMP MODULE RELAY INTERFACE
WOODWARD 5464-544 4-CHANNEL ACTUATOR CONTROL MODULE
WOODWARD 8271-425E
WOODWARD 8271-442 J
WOODWARD 8271-795
WORCESTER 10E39SWZD120AR6 ACTUATOR
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