6ES7138-4FA02-0AB0 亿佳似水
中断的利用
通过外中断请求取得总线控制权的设备可以通过中断中央处理机的现行程序，使处理机的全部功能为设备服务，利用整个指令系统操;纵数据和状态寄存器。每个可以中断处理机现行程序的设备在主存中有一对单元保存它的“中断向量”。其中个字存放它的服务程序的起始地址。第2个字是处理程序所使用的处理机状态字，通过正确地使用处理机状态字，可以转变处理机的程序态，改变所用的堆栈指示器，修改处理机的优先级。
(6)外中断步骤
在186机中下述中断处理步骤是由硬件自动完成的：
①如果中断优先级系统许可，处理机批准在所有申请中断的设备中，优先级高的设备取得总线控制权。
②设备取得总线控制权，向处理机发出“中断”命令，和它的服务程序的向量地址。向量地址和服务程序都是在核心态虚拟空间。中断向量的个字是服务程序的首地址，中断向量的第二个字(它的地址等于中断向量地址+2)是该服务程序所用的处理机状态字。
③处理机把现行处理机状态字和程序计数器存人处理机内的暂存寄存器。
④处理机从核心态虚拟空间取出新的程序计数器和状态寄存器(中断向量)。把老的程序状态和程序计数器压入由新的程序状态字15、14位所规定的堆栈。并且把老程序状态字的现行程序状态置人状态字寄存器的13、12位。启动服务程序。
这些操作，从处理机接受中断命令，至开始执行服务程序的条指令，所花的时间约为12微秒。这个时间是以整个过程中未发生直接传送为前提的。
⑤中断服务程序结束时，通过执行“中断返回”或“推迟跟踪中断返回”指令返回被中断的程序。执行上述命令的结果是从现行程序态堆栈中弹出两个字装人程序计数器和状态字寄存器。
SQUARE D V5D3253Y000A VR 2000A 5KV-AC VACUUM MEDIUM VOLTAGESWITCHGEAR B511748
SQUARE D V5D3253Y000A VR 2000A 5KV-AC VACUUM MEDIUM VOLTAGESWITCHGEAR B511747
SQUARE D V5D3253Y000A VR 2000A 5KV-AC VACUUM MEDIUM VOLTAGESWITCHGEAR B511746
SQUARE D V5D3253Y000A VR 2000A 5KV-AC VACUUM MEDIUM VOLTAGESWITCHGEAR B511727
SQUARE D V5D3153Y000A 4.16 Kva 1200 Amp EO DO CIRCUITBREAKER
SQUARE D V5D3133Y000 5KV 1200 Amp VACUUM CIRCUIT BREAKER
SQUARE D V5D3122Y000 4.76KV 1200A DO EO MEDIUM VOLTAGE CIRCUITBREAKER
Square D Universal Test Set
SQUARE D TYPE VR MEDIUM VOLTAGE CIRCUIT BREAKER
Square D Type VR Ground and Test Device - Excellent !!!
SQUARE D TYPE PJ PJF36080CU33AABSKYP 800A 800 AMP POWERPACKCIRCUIT BREAKER
Square D Type PBTB502G Buss DuctTap Box 225 Amp
SQUARE D TYPE NAAL 3 POLE 1000A CIRCUIT BREAKER W/SHUNT TRIPNAL361000 ... VF-17
Square D Type MEL436LSGZ1 Circuit Breaker noplug!!
SQUARE D TVS-4EMA32AC TVS4EMA32AC
SQUARE D TVS4EMA16A1 * IN BOX*
SQUARE D TVS-2EMA24AIC TVS2EMA24AIC
SQUARE D TVS2EMA16A1 * IN BOX*
Square D TVS2EBA24AC **GENUINE** SchneiderTelemecanique
Square D TVS2EBA12A Transient Voltage Surge Suppressor
Square D TVS1EMA12S Transient Voltage Surge Suppressor
Square D Transient Voltage Surge Suppressor TVS2EMA12AC 120 KA208/120 V 3 PH
SQUARE D TRANSIENT VOLTAGE SURGE SUPPRESSOR CAT#TVS1EMA24A 240kA120/240V *NIB*
SQUARE D TRANSFORMER, EE150T3H, 150KVA, 480VAC, 3 PHASE, 60HERTZ, 32"x44"x27"
SQUARE D TRANSFORMER SORGEL 3 PHASE TRANSFORMER 500kVA
Square D Transformer 3634934212 500 KVA 60 Hertz 3 Phase QL
Square D Transformer 1500/2000 kVA 13200V delta pri 480/277V secModel 98 TESTED
Square D TL8CCR43A3SX Breaker, 1200 Amp, 65 kAIR, NT12L1,Drawout,
Square D TL8CBR43A3SXAT Breaker, NT12L1, 1000 Amp,Drawout, !
Square D TL7ATR63A3SFFFWXCAT Breaker, 600 Amp, 65 kAIR, NT08L,Drawout,
Square D TL7AAR64A3SXCA Breaker, 800 Amp, 100 kAIR, NT08L,Drawout,
Square D TL7AAR64A3SFBBXPEA Breaker, 800 Amp, 100 kAIR, NT08L,Drawout,
Square D TL7AAR43A9SFFFXXCA Breaker, 800 Amp, 100 kAIR, NT08L,Drawout,
Square D Three Phase Substation Transformer w/ 15KV HVL LoadCurrent Interrupter
Square D Three Phase General Purpose Transformer 415Kva-EN415TQ54333R1
Square D Three Phase Distribution Transformer 150KVA 60HZ ClassKNAN
Square D Temporary Distribution Panel 212110570010001 #48383
Square D Temporary Distribution Panel 212110570010001 #48329
SQUARE D TELEMECANIQUE ATV66C23N4 300HP VARIABLE FREQUENCY ACDRIVE 460V VOLT
Square D Telemecanique AC Drive 150hp 460v
Square D SYMAX 8020 SCP631 Model 600 PLC, 16k RAM, 120 VAC I/O( in Package!)
SQUARE D SY/MAX TYPE SCP632 CLASS 8020 MODEL 600 PROCESSORREVISION 4.00 5VDC
SQUARE D SY/MAX MODEL 700 PROCESSOR 8020 SCP724 R X SER. I/J G/IREV. 6.00
SQUARE D SY/MAX MODEL 500 TYPE SCP-523 SERIES M1 REV. 9. 8K RAMMEMORY PROCESSOR
SQUARE D SY/MAX CLASS 8030 Type PS35 Power Supply 30611-541-518030PS35
SQUARE D SY/MAX 8030CRM565 REV A2 , SYNET POWER , (P1)
Square D Sy/Max 8020 SCP631 Model 600 Processor 8020SCP631 PLCSy/PEER Drop CPU
Square D Switchboard Circuit Breaker QED 1200a 480v I-Line IlinePanel
Square D Switchboard 500vdc with PAF361600DC1680 1600amp MainBreaker
Square D Surgelogic TVSS Surge Protector, TVS2EMA32AC, 320 kA,208Y/120 V,
Square D Surgelogic FC4IMA24C Surge Protective Device
Square D Surge Protective Device TVS4IMA24BC Surge Logic480/277V 3Ph
SQUARE D STARTER COMBO 8539SBA12V81CFF4H308TX11 120/240V60HZ
SQUARE D STARTER 8536SHO2
Square D Starter 8536SG01SY500 400Amp 600VAC 50/60HZ " "
Square D SQB12/SQIL12 I-Line Panelboard 480/277V 1200A
Square D Sorgel WatchDog 75 KVA Transformer With Taps
Square D Sorgel Transformer AA/FFA-S0 #64697
SQUARE D SORGEL 3 PHASE TRANSFORMER, 750T2463H, 750 KVA, TYPE 1ENCLOSURE
Square D Sorgel 3 Phase Dry Transformer 750 KVA 480-208Y/120Volt
Square D Sorgel 3 Phase Dry Transformer 2500 KVA 4160-480Y/277Volt
Square D Sorgel 3 Phase Dry Transformer 2000/2666 KVA13200-480Y/277 Volt
Square D Sorgel 3 Phase 2500/3250/4332 KVA 4800-480 Volt DryTransformer
Square D Solenarc AC HV Circuit Breaker, 1200 Amp ContinuousCurrent Type DSE 65
SQUARE D SOILD STATE TRIP CIRCUIT BREAKER 3000 AMP 600V 3 POLESEF30S1 S930LIT
Square D Soft Start 8660 MK002 2619940C 230V 200HP 460V400HP
Square D Soft Start 8660 MJO 22 230V 125HP 460V250HP
SQUARE D SMSDL SMSDL
Square D SMAP3800 Circuit Breaker - Reconditioned
SQUARE D SIZE SZ 7 REVERSING STARTER 8702 SJO-1 8702 SJO1 8702SJ0-1
Square D Size 7 Auto Reduced Voltage Starter
Square D Size 7 8736 SJO1S1 Reversing Motor Starter Sz 7 Coil480V 31104-400-50
Square D Size 6 Contactor 8502SHO0SX11
Square D Size 6 Contactor , Class 8502 , Type HO2 , (B3R)
Square D size 6 , Class 8536 , Type SH0-2
SQUARE D SIZE 5 WGO3 SERIES A 600 VOLT 1 YEAR WARRANTY
SQUARE D SIZE 5 600 MOTOR STARTER 8810SGO1V02S 8810 8810SGO1S30072-013-103
Square D SFD212LG2YB07D07 78.2A 25HP 208V NEMA 1 VariableFrequency Drive Enclos
Square D SESDG16E1C1S1G2 600V 1600A MICROLOGIC L/I/S/G INSULATEDCIRCUIT BREAKER
SQUARE D SERIES E1 QMB PANELBOARD CAT#0001 600A 600V3W 3PH
Square D SEMG08 LSG SS Trip 800A Frame/Sensor/RP BreakerSED36800LSG SE 800 Amp
Square D SEMG08 LSG SS Trip 800A Frame & Sensor w 400A RPBreaker SED36800LSG SE
Square D SEMG04 LSG SS Trip 800A Frame 400A Sensor w 300A RPBreaker SED36400 SE
Square D SEMG04 LSG SS Trip 800A Frame 400A Sensor w 225A RPBreaker SED36400 SE
Square D SEMG04 LSG SS Trip 800A Frame 400A Sensor w 200A RPBreaker SED36400 SE
Square D SEM36400LSGA4 LSG 400A Frame/Sensor/RP BreakerSED36400LSG SE SEMG08
SQUARE D SEFG30, 3000 AMP, 600VAC 1 Year Warranty
Square D SEFG30 3000 Amp SEF Circuit Breaker SE MicroLogicS930LSGT 3000A LSG
Square D SEFG20 2000 Amp 600 Volt 3 Phase Circuit Breaker
Square D SEF364000LSGA8Z 4000 Amp LSIG SE Circuit Breaker SEFSEF364000 LSG A
SQUARE D SEF364000LIES604 4000AMP MO,BOLT IN,LI Surplus Un
SQUARE D SEF363000LSG SEF363000LSG
SQUARE D SEF363000LS SEF363000LS
SQUARE D SEF363000LIES6D4, 3000 AMP
SQUARE D SEF363000LIES604 SEF363000LIES604
SQUARE D SEF363000LIES604 3000 AMP 120V SHUNT TRIP ALARM SWITCH120/240/4 AUX SW
Square D SEF363000LIA4 3000 Amp Electronic Trip SE Breaker LIARP100 SEF 3000A
Square D SEF363000LI 3000A 3-Pole 600V ARP100 Electronic TripCircuit Breaker
SQUARE D SEF362000LSG 600V 2000 AMP M-L L S I G INSULATED CASECIRCUIT BREAKER
Square D SEF362000LSET6AB 2000A SEF Electronic Trip Breaker 2000Amp LSI 600V SE
Square D SEF362000LIGES1A4 2000 Amp Circuit Breaker
SQUARE D SEF361600LSS1A8 600V 1600 AMP M-L L S I INSULATED CASECIRCUIT BREAKER
Square D SEF361600LSG 1600 Amp Circuit Breaker 3 Pole
Square D SEF361600LSESIA4 1600 Amp Circuit Breaker
SQUARE D SEF SEF364000LSGS3 4000 AMP ELECTRONIC CIRCUIT BREAKERSEF364000 LSIG
Square D SEF 1600 Amp SESFG16 Electronic Trip SE BreakerS9161600RP 1600A LSIG
SQUARE D SED36800LSG 600V 800 AMP M-LOGIC L S I G INSULATED CASECIRCUIT BREAKER
SQUARE D SED36800LIES5A8 600 V 800 AMP M.L. L I INSULATED CASECIRCUIT BREAKER
SQUARE D SED364000LS 600V 4000 Amp INSULATED CASE CIRCUITBREAKER
SQUARE D SED363000LS 600V 3000 Micro Logic L S I INSULATED CASECIRCUIT BREAKER
Square D SED363000 600V 3000A MICROLOGIC L/S/I INSULATED CIRCUITBREAKER
Square D SED362000LSG Refurbished Circuit Breaker 2000 Amp 600V3 Phase 3 Pole
Square D SED362000LS 600V 2000A MICROLOGIC L/I/S INSULATEDCIRCUIT BREAKER
SQUARE D SED361600LIES1A8 600V 1600 AMP M-L L I INSULATED CASECIRCUIT BREAKER
Square D SE SEF 3000A Electronic Trip Breaker 3000 Amp LIGSEF363000LIGA4 SqD
Square D SE SED 2500A Breaker 2500A ARP080 LSIG Trip 2000ASED362500LSGES5D4
SQUARE D SE FG25 600 VAC 2500 AMP S925LSIGT L/S/I/G CIRCUITBREAKER
Square D SCP-724 SY/MAX Series-C/I Rev6.00 Processor Module withKey 5VDC 4800mA
Square D Schneider SY/MAX 8055SCP452 450 Processor nib
Square D Schneider Masterpact NW 16HF 1600Amp Circuit BreakerWL3EERSSX9SXXA
Square D Schneider Masterpact NW 16 HF 1600 Amp BreakerWL3EERSSX9SXXA
Square D Schneider LAL34225MC1021 Circuit Breaker 225 Amp 225aMolded Case
Square D Schneider Electric S33595 Full Function Circuit BreakerTest Kit FFTK
SQUARE D SCHNEIDER 8839 58ELG4VW A07H09 ECONO-FLEX DEVICEADJUSTABLE SPEED DRIVE
Square D SB346IR 600a Main Breaker 480V 3Ph 4W w/ CT ProvisionsMJF36600 Main 3R
SQUARE D S7650A0C0B6A0A0A S7650A0C0B6A0A0A
SQUARE D S7550B0C0B6E0A0A S7550B0C0B6E0A0A
Square D S33595 Full-Function Test Kit 115V/2230V 50/60Hz60W
Square D S33595 Full Function Tester Set Circuit Breaker TestKit Mint Condition
Square D S33595 Full Function Tester Set Circuit Breaker TestKit Micrologic
Square D S33595 Full Function Tester Set Circuit Breaker TestKit
Square D S33595 Circuit Breaker Test Kit *CLEAN*
SQUARE D S174A S174A
SQUARE D S164N S164N
SQUARE D S164A S164A
SQUARE D S164A S164A
Square D RLF46160CU44AE Circuit Breaker, 1600 Amp, 100 kAIR, 4Pole, !
Square D RLF36200U31A Breaker 2000A 600v Powerpact RL2000
Square D RLF36200CU63AE1VAC Breaker, 2000 A, 100 kAIR, Modbus,Aux Contacts,
Square D RLF36200CU44EBDSAJK Breaker, 2000 A, 100 kAIR, ShuntTrip, !
Square D RLF36160U44AJK Breaker, 1600 A, 100 kAIR, !
Square D RLF36160U44ABDSAYP Breaker, 1600 A, 100 kAIR, !
Square D RLF36160U43AE1VABSA Breaker, 1600 A, 100 kAIR, !
Square D RLF36160U31ABDJK Breaker, 1600 A, 100 kAIR, !
Square D RLA36120CU44A Circuit Breaker - in Box
Square D RKF36250CU31AAASK Circuit Breaker - inBox
Square D RKF36200CU43AE1 Breaker, 2000 A, 65 kAIR,Modbus,
SQUARE D RKF36160CU44AYP 600 VAC 1600 A MICROLOGIC 6.0A L/S/I/GCIRCUIT BREAKER
Square D RKF36160CU43AE1YP Circuit Breaker - inBox
Square D RKF36160 Breaker, 1600 A, 65 kAIR, !
Square D RKF36120PowerPact RK1200 1200 Amp 3 Pole CircuitBreaker LSIG
Square D RKA36100CU43AE1SA Breaker, 1000 A, **** Rated, 65kAIR, !
Square D RJF36250U44A Circuit Breaker - in Box
SQUARE D RJF36250CU44A 2500A 600V 3P 25K