ABB PE1364B

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PLC是采用“順序掃描，不斷循環(huán)”的方式進行工作的。即在PLC運行時，CPU根據(jù)用戶按控制要求編制好并存于用戶存儲器中的程序，按指令步序號（或地址號）作周期性循環(huán)掃描，如無跳轉(zhuǎn)指令，則從條指令開始逐條順序執(zhí)行用戶程序，直至程序結(jié)束。然后重新返回條指令，開始下一輪新的掃描。在每次掃描過程中，還要完成對輸入信號的采樣和對輸出狀態(tài)的刷新等工作。

PLC的一個掃描周期必經(jīng)輸入采樣、程序執(zhí)行和輸出刷新三個階段。

PLC在輸入采樣階段：首先以掃描方式按順序?qū)⑺袝捍嬖谳斎腈i存器中的輸入端子的通斷狀態(tài)或輸入數(shù)據(jù)讀入，并將其寫入各對應(yīng)的輸入狀態(tài)寄存器中，即刷新輸入。隨即關(guān)閉輸入端口，進入程序執(zhí)行階段。

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SCHNEIDER MODICON 2A 24VDC POWER SUPPLY TSXSUP1021 *MISSING DOOR*
 
SCHNEIDER TSX QUANTUM INTERBUS S MASTER MODULE 140 NOA 611 00
 
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TELEMECANIQUE 24VDC COIL integral 18 SELF-PROTECTED STARTER LB1LB03P05 LD1LB030
 
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AEG SH04 24VDC COIL MINI RELAY 910-302-056-00
 
SCHNEIDER TSX MOMENTUM 24VDC 16 POINT I/O BASE 170ADI34000
 
TELEMECANIQUE OVERLOAD RELAY LR2 D3361
 
TELEMECANIQUE integral 18 SELF-PROTECTED STARTER LB1 LB030 / LB1 LB03P02
 
AEG MODICON BASIC MODULE AS-B885-002
 
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SCHEIDNER / TELEMECANIQUE 24V COIL 80A CONTACTOR LC1 D6511
 
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GOULD MODICON 115VAC OUTPUT MODULE B350 *DAMAGED PLASTIC, LOT OF 2*
 
AEG MODICON TSX QUANTUM CPU 256K 1xMB+ CONTROLLER MOD 140 CPU 113 02/043 502 797
 
MODICON INTELLIGENT BRUSHLESS SERVO POSITIONER SERVO DRIVE 410-2
 
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AEG MODICON BLANG CARD MODULE NUL 200 4130-042.244865
 
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TELEMECANIQUE 24VDC COIL 110A 600VAC MAX CONTACTOR LP1 D8011
 
SCHNEIDER MODICON TSX PREMUIM 24VDC OUTPUT MODULE TSXDSY08T22
 
GOULD MODICON REMOTE I/O SYSTEM MODEL J200 EXPANDER J200-001
 
AEG MODICON M907 MEMORY MODULE PCB M907-000 REV. A
 
SCHNEIDER 11kW/15HP VARIABLE SPEED AC DRIVE ATV28HD16N4U
 
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AEG MODICON PROGRAMMABLE CONTROLLER PC-0984-385
 
TELEMECANIQUE 24V DC CONTACTOR LC1 D18 BL
 
AEG MODICON INPUT MODULE, DEP 210/AS-BDEP-210?, NIB
 
GOULD MODICON PROGRAMMABLE CONTROLLER AS-9507-000 REV. D
 
TELEMECANIQUE 600V 60A 24VDC COIL CONTACTOR LP1 D40004
 
TELEMECANIQUE 690VAC MAX MOTOR STARTER LB1 LB039
 
TELEMECANIQUE 24VDC COIL 40A CONTACTOR LP1 D2501
 
MODICON JC SYSTEMS REV. B 1007-100-01B PC BOARD 100-0299
 
TELEMECANIQUE OVERLOAD RELAY LR2 D1307 *LOT OF 2*
 
AEG SCHNEIDER MODICON TSX COMPACT ANALOG OUTPUT MODULE DAU 202 6728-042.244666
 
TELEMECANIQUE 24VDC OUTPUT UNIT TSX DEF 812
 
AEG MODICON PROGRAMMABLE CONTROLLER PC-0984-385 PROM ID AS-C950-110
 
TELEMECANIQUE integral 18 REVERSING STARTER LD1 LB030 / LB1 LB03P05
 
SCHNEIDER MODICON TSX PREMIUM 4-AXIS ANALOG MOTION CONTROL MODULE TSX CAY42
 
TELEMECANIQUE 24VDC COIL integral 18 SELF-PROTECTED STARTER LB1LB03P06 LD1LB030

SCHNEIDER MODICON SYMAX BRIDGE/ MUX MODULE NW-BM85Y422
 
GOULD MODICON 115VAC OUTPUT MODULE B804 *LOT OF 10, MISSING LABELS*
 
AEG MODICON CPU PROCESSOR MODULE C916-100
 
AEG MODICON PROGRAMMABLE CONTROLLER PC-F984-685 / AS-9715-001 MISSING PARTS
 
AEG MODICON PROGRAMMABLE CONTROLLER PC-F984-385 BROKEN HANDLE BROKEN PLASTIC