操作码一经译码后,即可向操作控制器发出具体操作的特定信号
。程序计数器:指明程序中下一次要执行的指令地址的一种计数器,又称指令计数器。它兼有指令地址寄存器
和计数器的功能。当一条指令执行完毕的时候,程序计数器作为指令地址寄存器,其内容必须已经改变成下一条指令的地址,从而使程序得以持续运行。为此可采取以下两种办法:
**种办法是在指令中包含了下一条指令的地址。在指令执行过程中将这个地址送人指令地址寄存器即可达到程序持续运行的目的。这个方法适用于早期以磁鼓、延迟线等串行装置作为主存储器的计算机。根据本条指令的执行时间恰当地决定下一条指令的地址就可以缩短读取下一条指令的等待时间,从而收到提高程序运行速度的效果。
CUTLER HAMMER 250 EZC-G 449D187G27 MINALITE GREEN 250V PILOT LIGHT D593438
TURCK CKM 19-11-5 MINI FAST CORDSET D593577
WOODHEAD BG20881-M100 CABLE-10M-TQ5 CABLE-WIRE ASSEMBLY 10M D594175
VEEDER-ROOT 793005-121 MULTI-SHIFT COUNTER 115V-AC 10W D594053
RELIANCE 0-51839-4 IRCE PCB CIRCUIT BOARD D594459
JOHNSON ConTROLS NU-DCM101-0 DIGITAL ConTROL EXPANSION MODULE REV M D594427
GE FANUC IC600BF816K THERMOCOUPLE INPUT MODULE BOARD D594688
SET OF 6 BUCHANAN 426 EXTRA HEAVY DUTY SECTIonAL TERMINAL D594624
ALLEN BRADLEY 800T-FXQ24RA1 RED ILLUMINATED PUSHBUTTON 24V-AC/DC SER T D594690
AGASTAT 7012PK 1-300SEC TIMING RELAY 125V-DC D595377
ALLEN BRADLEY 1746-OX8 SLC 500 OUTPUT MODULE SER A D595397
MERCOID PPQ-3-X2A PRESSURE SWITCH 8-20PSIG 120/240V-AC 4A D595801
AEG MODICON AS-H819-209 7-SLOT I/O CHASSIS RACK SER 984 D596145
K-TEK TX-1000-1AW THERMAL DISPERSION SWITCH ConTROL PCB BOARD D559071
NAMCO SL3B2W SNAP-LOCK LIMIT SWITCH 125/250/480/600V-AC 20/15/10/5A D531813
CUTLER HAMMER D40RBH POWEREED RELAY TYPE R POWERED SER CA1 120V-AC D541196
NEWPORT 205-PA1-R-C0 DC CURRENT DIGITAL PROCESS PANEL METER D554929
BECK 13-2245-03 ESR-4 ConTROL PCB CIRCUIT BOARD D541797
ABB RXMH2 RK 223 069-EC 120V-AC RELAY D523163
IFM EFECTOR DD0116 SPEED MonITOR 110-240V-AC/DC D533377
DYNAMATIC 15-54-13 PCB CIRCUIT BOARD MODULE D555782
PRINTRonIX 101578-001.V OPERATOR INTERFACE ConTROL PANEL D538455
ALLEN BRADLEY MSR138DP 440R-M23145 GUARDMASTER SAFETY RELAY SER B 115VAC D534368
ALLEN BRADLEY 800MR-HH5BB 2 POSITION BLACK SELECTOR SWITCH SER C D551159
ANGLAND ELTEKNIK TILLQUIST SA51 VIBRATION AMPLIFIER 0-25MM/S 110/220V-AC D548187
WEIDMULLER 8594840000 MAZ DC/DC ConFIGURABLE ISOLATOR D530623
DURAG D-R281AV-NO30 PCB CIRCUIT BOARD D538877
ASHCROFT LPDN4GGS25 480V-AC 15A AMP PRESSURE SWITCH D558291
PHOENIX ConTACT QUINT-BAT/24DC/3.4AH RECHARGEABLE BATTERY MODULE D558155
GHIELMETTI 1757447 HKGC SOLOTHURN ROTARY SWITCH 500V-AC 15A AMP D539093
PHOENIX ConTACT FLT 60-400 FLASHTRAB 400V-AC 60KA 30A/S CURRENT ARRESTER D550002
BAUMER FS219.551BE8M IMPULSE COUNTER 110V-AC D543817
GAI LANTEK LIU-4/BB SOCKET base PCB CIRCUIT BOARD MODULE REV A D523501
ABB 289B359A21 MG-6 250V-DC AUXILIARY RELAY D535082
GENERAL ELECTRIC GE 430210001 T-520SW GRAY CARD READER D553844
THERMO ENVIRonMENTAL 48-8 COUNTER W/ ANALOG READ OUT D558119
IRION & VOSSELER FR228.55FBD9M IMPULSE COUNTER 220V-AC D543819
ABB 3BSC980002R495 3BSE018064R1 PCB CIRCUIT BOARD D576955
FOXBORO 8121A CURRENT CALIBRATOR 118V-AC 17VA D581483
ALLEN BRADLEY 42GRU-9203-QD PHOTOSWITCH SENSOR SER B D572853
GEMS 22DFAGF151KZZZA 12V-DC 0-90MV-DC SENSOR D576543
IFM EFECTOR IG0321 IGA2005-BBOA/V4A INDUCTIVE SENSOR 20-250V 350MA D573255
ALLEN BRADLEY 42SML-7100 PHOTOSWITCH TRANS-BEAM SENSOR SER B 11-28V D573391
IFM EFECTOR IFT200 IFB3007-BPKG/M/V4A/US-104 INDUCTIVE SENSOR D573541
IFM EFECTOR IE5099 IEC3002-BPOG INDUCTIVE SENSOR 10-36V-DC 200MA D573504
IFM EFECTOR OG5012 OGR-DPKG RETRO-REFLECTIVE SENSOR 10-55V-DC 250MA D573578
GE FANUC IC200CHS001B I/O CARRER BARRIER STYLE D583401
AEG MODICON AS-J890-001 REMOTE I/O PROCESSOR D582172