ABB 3HNA014870-001

外部輸入信號的采集

??? PLC的外部設備主要是指控制系統中的輸入輸出設備，其中輸人設備是對系統發(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備使用的是常開還是常閉觸點，并以此為基礎進行程序編制。否則易出現控制錯誤。

????在PLC內部存儲器中有專用于輸入狀態(tài)存儲的輸入繼電器區(qū)，各輸入設備（開關、按鈕、行程開關或傳感器信號）的狀態(tài)經由輸入接口電路存儲在該區(qū)域內，每個輸入繼電器可存儲一個輸入設備狀態(tài)。PLC中使用的"繼電器"并非實體繼電器，而是"軟繼電器"，可提供無數個常開、常閉觸點用于編程。每個"軟繼電器"僅對應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備相聯系，其"線圈"狀態(tài)只能由外部輸入信號驅動。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