6ES7288-2DE08-0AA0 亿佳保量
4.向量区的保护
在186机中，从。~377号单元为系统向量区，在这里存放的信息极为重要，不允许破坏，由于系统堆栈通常设置在系统向量区之上，它是向低地址扩展的，进栈操作有可能破坏向量区。为防止进栈操作破坏系匆句量区，在186机内，设有堆栈溢出检测功能，当进栈地址小于(400)8时引起“堆栈溢出”内中断。
5.中断系统
介绍了中央处理机内程序可访的主要资源的基础上，以中断系统为题目来说明系统各部分相互作用的约定。
(1)直传请求和直传
在186机中，直传请求只是请求单总线控制权，在获得总线控制权后，总线上的丙个设备之间直接传送数据，无需中央处理机为干预。但因为在单总线使用上会与中央处理礼发生冲突，规定两者的优先次序。在180系列中，直传请求的优先级高于处理机。在186机中更是重点保证直传请求能获得快的响应。基本上做到现行总线周期一结束就予以响应。直传请求的等待时间不大于代个存贮周期。直传请求设备一旦获得控制权以后，可按与之协同工作的存贮器等效周期时间相同的速度进行高速传输。
(2)外设硬件中断请求
186计算机设置了四根外中断请求线，供单总线上的外设为中断的目的请求总线控制权。外中断请求在中央处理机完成一条指令时，按预定的硬件优先级予以响应，在所有请求中优先级高的设备取得总线控制权。通过外中断请求线取得总线控制权的设备原则上可以进行两种可能的操作：(l)启动总线数据传输(2)发中断命令及中断向量地址，使处理机执行它所要求的中断服务程序。或者在进行种操作之后再进行第二次操作。实际上在180系列中的大多数设备通过外中断请求获得控制权的设备只进行第二种操作。
(3)内中断和紧急内中断
中央处理机和存贮系统发生的错误和某些指令的执行，使处理机中断现行程序转而执行相应的中断处理程序。这个过程与响应外中断请求的过程相类似，由于中断源是在中央处理机内部，称为内中断。根据内中断源的性质，内甲断分为内中断和紧急内中断两类。凡是检测到一次内中断请求时，本条指令尚能执行完毕，再转入中断处理的称为一般内中断;凡是内中断的原因使本条指令不能进行下去，中止引起内中断的操作，立即转人中断处理的，称为紧急内中断。
(4)中断的申请及优先级结构
内中断及紧急内中断源直接向处理机申请中断并提供中断向量地址。内中断不受处理机优先级的屏蔽，即可视为优先于所有处理机程序。外部设备请求中断表现为请求总线控制权的形式。对总线控制权处理取决于设备在单总线优先级结构中的位置。
Cutler Hammer MDS3800 Circuit Breaker - Reconditioned
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CUTLER HAMMER IQA-6400 IQ ANALYZER **
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CUTLER HAMMER D520TA3 D520TA3
CUTLER HAMMER D520TA2 D520TA2
CUTLER HAMMER D520TA1 D520TA1
CUTLER HAMMER D520BC13 D520BC13
CUTLER HAMMER D520BC12 D520BC12
CUTLER HAMMER D520APJ D520APJ
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CUTLER HAMMER CP4HD364 CP4HD364
CUTLER HAMMER CN15TN3 CONTACTOR **
CUTLER HAMMER CN15SN3C CN15SN3C
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CUTLER HAMMER CIRCUIT BREAKER 1000 AMP 600V 3 POLE NS361000A
Cutler Hammer Circuit Breaker (7 amp) Explosion proof Enclosure, 25 Hp
CUTLER HAMMER CAT# W201K4CF Size 4 CONTACTOR NEMA SIZE 4 135AMPS
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Cutler Hammer Breaker HKD3400F w/ Trip Unit 400 Amp Y2
Cutler Hammer AN16SNOAB Size 5 Non Reversing Starter InBox
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CUTLER HAMMER A900MIDAC A900MIDAC
Cutler Hammer A700DN022AB **GENUINE** Westinghouse
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CUTLER HAMMER 98-00100-00 980010000
Cutler Hammer 975820 NSNP **GENUINE** 9 758 20 Westinghouse
Cutler Hammer 95474 NSNP **GENUINE** 9 547 4 Westinghouse
CUTLER HAMMER 92-01941-02 920194102
CUTLER HAMMER 92-01875-03 920187503
CUTLER HAMMER 92-01858-00 920185800
CUTLER HAMMER 92-01815-01 920181501
CUTLER HAMMER 92-01404-00 920140400
CUTLER HAMMER 92-01087-01 920108701
CUTLER HAMMER 92-00583-00 920058300
CUTLER HAMMER 8423772 8423772
CUTLER HAMMER 83E9175 3 POLE 600 AMP CIRCUIT BREAKERINTERRUPTER TESTED
CUTLER HAMMER 7685T-12 PANELMATE ePRO PS **
CUTLER HAMMER 7585T-8 7585T8
CUTLER HAMMER 6DSL-F5000 6DSLF5000
Cutler Hammer 65k 3 pole 800 amp trip 600v HMDL3800W CircuitBreaker MT3800T
Cutler Hammer 600 Amp 600 VAC 3 Pole LDC3600F LDC3600
CUTLER HAMMER 5CLE-600E 5CLE600E
CUTLER HAMMER 542VM 542VM
Cutler Hammer 511H99341 **GENUINE** 511H993 41Westinghouse
Cutler Hammer 511H99241 **GENUINE** Westinghouse
Cutler Hammer 511H961A NSNP **GENUINE** Westinghouse
CUTLER HAMMER 511H1193-39 511H119339
CUTLER HAMMER 2D78522G01 2D78522G01
CUTLER HAMMER 1755T-PMPS 1700 OPERATOR PANEL **
CUTLER HAMMER 1755T-PMPP-1700 1755TPMPP1700
CUTLER HAMMER 15CLE-175E 591C376G01 15.5V 175E AMPS FUSE15CLE175E NIB FS
CUTLER HAMMER 1585THX 1585THX
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Cutler Hammer 10316H54 **GENUINE** Westinghouse
CUTLER HAMMER 1000VAC Mining Breaker HLCLM Frame 3 Pole 400 Ampwith 120VAC UV
Cutler Hammer (LAB2300W) 2 Pole 300 Amp Circuit Breaker, Surplus
CUTLER DH365FWK NEMA 4X Stainless disconnect switch 400 Amp 600Volt 3PH
clipper CUTLER HAMMER 160kva CPS160208YSK 208 TRANSiENT VOLTAGESURGE SUPPRESSOR
C32NN3 Cutler-Hammer / EATON Series C1 Blue Top Contactor 3 Pole700 Amp 600V
AN16SN0AB Cutler Hammer Eaton Size 5 Starter. No Box
ABB 15CLPT VIZ-75 Transformer with Cutler Hammer Fuse
(LOT OF 10) Cutler Hammer Westinghouse HFD3015 3p 15a 600vCircuit Breaker
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WESTINGHOUSE CUTLER HAMMER LA3400F LA Frame Only 400 AMP Max2602D99G02
Westinghouse 3D17187G01 Assembly CTRL PCB 230/460V E-S JR
Westinghouse 16SPBDOS 1600 Amp Drawout Frame for SPB 1600ACutler-Hammer Cradle
WESTINGHOUSE / CUTLER HAMMER MOTOR PROTECTOR & ENCLOSUREIQ1000-II IQ1000II
UN CUTLER HAMMER HFD3225 600 VAC 225 Amp 3 Pole CIRCUITBREAKER
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Size 4 Combination Motor Starter
SIEMENS MMC BUCKET w/ FURNAS SIZE 4 14JT+32A & CUTLER HAMMER 150AMP BREAKER
Reliance Electric DC Contactor 417690-4R 6702ED591 Coil 74 VDCCutler Hammer R E
RELIANCE ELECTRIC CUTLER-HAMMER DC CONTACTOR 417690-4R /6702ED591
nib cuttler hammer jgs325033wz2 circuit breaker 3 pole 250 a
NIB CUTLER-HAMMER SQUARE D D85LSG DIGITRIP RMS 810D CIRCUITBREAKER 7829C54G05
EATON CUTLER-HAMMER ELLBN3600W GROUND FAULT
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Eaton Cutler-Hammer SVX9000 HVX9000 PX0011211B 10165286 CVA1
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