500-3103

500-3103

500-3103

500-3103

500-3103

500-3103

__外设服务是让PLC可接受编程器对它的操作，或通过接口向输出设备如打印机输出数据.
____通讯处理是实现PLC与PLC，或PLC与计算机，或PLC与其它工业控制装置或智能部件间信息交换的。这也是增强PLC控制能力的需要。
____也就是说，实际的PLC工作过程总是：公共处理--I/O刷新--运行用户程序--再公共处理--……反复不停地重复着。

1.1.3 可编程控制器实现控制的方式

[NextPage]

Hewlett Packard 12780A ECMMO 256K Board 12780-60001




Hewlett Packard 12731-60001 MEM Board 1273160001




Hewlett Packard 12897-60004 DCPC Board 1289760004




Hewlett Packard 12779A ECMMO 128K Board 12779-60001




Hewlett Packard 12747-60001 64K MOD Board 1274760001




6 X Hewlett Packard CC364A 64A Toner Cartridge ***DISCOUNT*** 


Patient Monitor hewlett packard M1166A model 66s


Hewlett Packard Photosmart PS7450 Color Printer


The Forest Lovers By Maurice Hewlett 1898 Rare


 HP 48GX Hewlett Packard Graphic Calculator RPN 128Kb Ram Case Included


Hewlett Packard 69720A Digital to Analog Conv. Card 


Hewlett Packard: 54001A 1GHz Active Probe w/o Tips 


Hewlett Packard HP LaserJet 5si Printer refurb 11x17


Hewlett Packard HP A7346A surestore fc 1Gb / 2Gb Entry Switch A7346-63001




HEWLETT PACKARD HP 410B VACUUM TUBE VOLT METER VTVM ** WORKS GREAT **


Hewlett Packard HP Laserjet 4Si Printer Maintenance Kit


Hewlett Packard Genuine HP C4197A OEM Toner Fuser Kit




HEWLETT PACKARD TEST & MEASURE 8709A/H10 USPP 8709AH10


HEWLETT PACKARD TEST & MEASURE X885A NSPP X885A


HEWLETT PACKARD WS093AT SBUY NVIDIA QUADRO 600 1.0GB GRAPHICS UPC 886111015146




HP Hewlett Packard LaserJet 2300 Smart Print Toner Black Q2610A


HEWLETT PACKARD COMPUTER C2021A-3302 USPP C2021A3302


Hewlett Packard - Coupler/Isolator - 5086-7295


HP HEWLETT PACKARD 430C - free shipping


HP HEWLETT PACKARD power supply - free shipping


HEWLETT-PACKARD Model 78171A Strip Chart Recorder $189


Hewlett Packard Jornada 720 PDA


Hewlett Packard Print Server Appliance 4250 HP J7941A


HP Hewlett Packard LaserJet Toner Cartridge Black CE740A


Hewlett Packard 507169-001 Hp Pavilion Dv7-1200 Laptop Sb (ff)




Hard Drive Hewlett Packard 9B1001-035 D2077-60100 HDD


HEWLETT PACKARD TEST & MEASURE 285381-001 USPP 285381001


Hewlett Packard 1070-OKC-0353 (Pack of 6) 3 X 1" THERMAL TRANSFER LABELS




HEWLETT PACKARD TEST & MEASURE 44473A USPP 44473A


HP(HEWLETT PACKARD) 16515A CARD 1GHz TIMING MASTER CARD


Hewlett-Packard KL317UP#ABA-B3 Hewlett-Packard.Desktop DC 7800 Core 2 Duo Dual-C




Hewlett Packard Agilent E4502A 1x17 VXI Switch Module


NEW HP Hewlett Packard PROBOOK 535776-001 17.3" LED LCD




NEW HP Hewlett Packard PROBOOK 535777-001 17.3" LED LCD




NEW HP Hewlett Packard PROBOOK 535779-001 17.3" LED LCD




NEW HP Hewlett Packard PROBOOK 535778-001 17.3" LED LCD




Hewlett Packard Vintage HP All In One Computer Model 9826


Hewlett Packard Agilent 5316A Universal Counter 5316




Agilent Hewlett Packard 5063-6600 Eclipse XDB-C8 Column 5µm Believed to be New?


HEWLETT PACKARD C4822A - HEWLETT HP NO. 80 PRINTHEAD A




HEWLETT PACKARD CB092A#B1H HP OFFICEJET PRO 8000 SERIES PRINTER HP OFFICEJET PRO




HP HEWLETT PACKARD FIBER OPTIC COMMUNICATIONS CARD


Hewlett Packard 98628A Data Comm - 




HEWLETT PACKARD Q2670A - HEWLETT HP COLOR LASERJET3500