ABB 3BUS208802-001

外部輸入信號的采集

??? PLC的外部設(shè)備主要是指控制系統(tǒng)中的輸入輸出設(shè)備，其中輸人設(shè)備是對系統(tǒng)發(fā)出各種控制信號的主令電器，在編寫控制程序時必須注意外部輸入設(shè)備使用的是常開還是常閉觸點，并以此為基礎(chǔ)進行程序編制。否則易出現(xiàn)控制錯誤。

????在PLC內(nèi)部存儲器中有專用于輸入狀態(tài)存儲的輸入繼電器區(qū)，各輸入設(shè)備（開關(guān)、按鈕、行程開關(guān)或傳感器信號）的狀態(tài)經(jīng)由輸入接口電路存儲在該區(qū)域內(nèi)，每個輸入繼電器可存儲一個輸入設(shè)備狀態(tài)。PLC中使用的"繼電器"并非實體繼電器，而是"軟繼電器"，可提供無數(shù)個常開、常閉觸點用于編程。每個"軟繼電器"僅對應(yīng)PLC存儲單元中的一位（bit），該位狀態(tài)為"1"，表示該"軟繼電器線圈"通電，則程序中所有該繼電器的觸點都動作。輸入繼電器作為PLC接收外部主令信號的器件，通過接線與外部輸入設(shè)備相聯(lián)系，其"線圈"狀態(tài)只能由外部輸入信號驅(qū)動。輸入信號的采集工作示意圖如圖1。

輸入繼電器線圈其狀態(tài)取決于外部設(shè)備狀態(tài)

FANUC ROBOTICS AXIS CONTROL PCB BOARD A16B-2200-0853/?06B W/ DAUGHTER BOARDS
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FANUC CONTROLLER CARD A16B-1212-0870/?15C
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FANUC * BRAKE UNIT * A05B-2408-C001
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FANUC * CIRCUIT BOARD * A16B-3200-0230/?03A
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FANUC VELOCITY CONTROL UNIT, A06B-6050-H103
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FANUC ROBOTICS AXIS CONTROL PCB BOARD A16B-2200-0853/?05B W/ DAUGHTER BOARDS
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FANUC ROBOTICS POWER SUPPLY A05B-2440-C 470
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FANUC CIRCUIT BOARD PCB A16B-3200-0230/?08B
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FANUC I/O PROCESS BOARD A16B-2203-0520/?05B
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FANUC SERVO AMPLIFIER A06B-6066-H235 *FOR PARTS/REPAIR*
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GE FANUC S2K SERIES SERVO MOTOR CONTROLLER IC800SSI228RD2-?BE *PARTS/REPAIR
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FANUC TEACH PENDANT A05B-2308-C300 PARTS?or?REPAIR
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FANUC * OPERATOR PANEL PARTS?or?REPAIR DAMAGED NO 1 * A05B-2308-C004
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FANUC ROBOTICS FUJITSU MDI/CRT UNIT A02B-0051-0032 *PARTS/REPAIR*
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FANUC * OPERATOR PANEL PARTS?or?REPAIR DEMAGED NO 4 * A05B-2308-C004
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FANUC * OPERATOR PANEL PARTS?or?REPAIR DAMAGED NO 3 * A05B-2308-C004
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FANUC ROBOTICS FUJITSU DC VELOCITY CONTROL UNIT A06B-6047-H003 *DAMAGED #1*
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FANUC * OPERATOR INTERFACE PANEL MISSING DOOR COVER * A05B-2308-C004
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FANUC A20B-1006-0300/?05C E-STOP CONTROL BOARD, PARTS?or?REPAIR
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FANUC LTD TEACH PENDANT SCRATCHED LABEL PARTS AND REPAIR
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FANUC ROBOTICS 30S/3000 AC SERVO MOTOR A06B-0319-B202#?7008 *PARTS/REPAIR*
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GE FANUC AC SERVO MOTOR, NO LABEL, PARTS/REPAIR, LISTING #2
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GE FANUC AC SERVO DRIVE A99L-0162-0001 *PARTS/REPAIR*
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FANUC ROBOTICS 3.8kW a22/2000 AC SERVO MOTOR A06B-0147-B675, PARTS/REPAIR #3
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FANUC ROBOTICS 3.8kW a22/2000 AC SERVO MOTOR A06B-0147-B675, PARTS/REPAIR #2
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FANUC ROBOTICS MODEL 20S AC SERVO MOTOR A06B-0502-B267
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FANUC ROBOTICS TEACH PENDANT A05B-2308-C300 *PARTS/REPAIR #2*
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FANUC ROBOTICS SERVO CONTROL BOARD A20B-1001-0770/?04B PARTS?or?REPAIR
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FANUC ALPHA SERIES a3 AC 5.5KW SPINDLE MOTOR A06B-0853-B301 *PARTS/REPAIR*
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GE FANUC OPERATOR PANEL 44C741056-G01R0?7 *PARTS/REPAIR*
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FANUC ROBOTICS 30S/3000 AC SERVO MOTOR A06B-0319-B205#?7008 *CAP DAMAGE*
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FANUC ROBOTICS a22/3000 AC SERVO MOTOR A06B-0148-B675 *PARTS/REPAIR*
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FANUC ROBOTICS TEACH PENDANT A05B-2308-C300 *PARTS/REPAIR #1*
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FANUC ROBOTICS CIRCUIT BOARD A16B-2200-0450/?07B *PARTS/REPAIR*
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GE FANUC ROBOTICS MODEL 10 AC SERVO MOTOR A06B-0501-B201#?7073, PARTS/REPAIR
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FANUC ROBOTICS 30F 3-PHASE 2000RPM AC SERVO MOTOR A06B-0353-B831, PARTS/REPAIR
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GE FANUC ROBOTICS OPERATOR PANEL 44C741055-G01R0?6 *PARTS?or?REPAIR*
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FANUC ROBOTICS TEACH PENDANT A05B-2051-C143 *BAD*
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GE FANUC PENDANT CABLE MR-20LW WIRE DAMAGED
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FANUC ROBOTICS 3000RPM 1.4kW aM6/3000 AC SERVO MOTOR A06B-0162-B175#?0003, PARTS
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FANUC MODEL a22/3000 4.4KW AC SERVO MOTOR A06B-0148-B175#?7008, PLASTIC #1
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FANUC ALPHA SERIES a8 AC SPINDLE MOTOR A06B-0855-B190#?3000 *PARTS/REPAIR*
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FANUC ROBOTICS SERVO AMPLIFIER DRIVE BOARD A16B-1100-0300/?02A *PARTS/REPAIR*
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FANUC ROBOTICS SERVO AMPLIFIER UNIT A06B-6093-H113 PARTS?or?REPAIR
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FANUC TEACH PENDANT, DETACHING TOUCHPAD, PART NUMBER UNAVAILABLE
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FANUC MODEL a M30/3000I 4.3KW AC SERVO MOTOR A06B-0267-B605-?R, ENCODER
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FANUC ROBOTICS LCB BOARD A16B-2202-0560/?02A *DAMAGED*


GE FANUC OPERATOR PANEL OP PNL OVRD/400 / 44C741055-G01 *MISSING BUTTON*
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GE FANUC a12/3000 MODEL 2.8kW AC SERVO MOTOR A06B-0143-B075#?7008 PARTS/REPAIR
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FANUC ROBOTICS 5.5KW AC SERVO MOTOR A06B-0893-B190#?3000 *AS IS*
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FANCU ROBOTICS ALPHA SERIES a22/1500 3.0kW AC SERVO MOTOR A06B-0146-B675, PARTS
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FANUC ROBOTICS 3.8kW a22/2000 AC SERVO MOTOR A06B-0147-B675, PARTS/REPAIR
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FANUC ROBOTICS SERVO AMPLIFIER A06B-6066-H011 *PARTS?or?REPAIR*
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FANUC ROBOTICS CNC CONTROL BOARD A20B-0009-0630/?07E *PARTS/REPAIR*
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FANUC A06B-0313-B072 #7000 AC SERVO MOTOR
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FANUC ROBOTICS CONNECTION BOARD A20B-1003-0200/?03A PARTS?or?REPAIR
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FANUC ROBOTICS ALPHA SERIES AC SERVO MOTOR *MISSING LABEL*
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FANUC * A30/3000IS 4.3KW AC SERVO MOTOR, NO ENCODER * A06B-0267-B605
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FANUC ROBOTICS HI-FI MDI/CRT UNIT OPERATOR PANEL A02B-0091-C052 *PARTS/REPAIR*
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FANUC SERVO AMPRIFIER A06B-6100-H004 PARTS?or?REPAIR
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FANUC ROBOTICS 3.8kW a22/2000 AC SERVO MOTOR A06B-0147-B075#?7008, PARTS/REPAIR
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FANUC * OPERATOR INTERFACE "PARTS" * A05B-2301-C130