描述
對嵌入式工程師來說一個(gè)很大的好處是,我們的IDE和工具鏈可以自動產(chǎn)生應(yīng)用程序或內(nèi)存空間校驗(yàn)和(Checksum),從而根據(jù)這個(gè)校驗(yàn)和驗(yàn)證應(yīng)用程序是否完好。有趣的是,在許多這些案例中,只有在將程序代碼加載到設(shè)備時(shí),才會用到校驗(yàn)和。
然而,如果CRC或校驗(yàn)和保持在內(nèi)存中,那么驗(yàn)證應(yīng)用程序在啟動時(shí)(或甚至對長時(shí)間運(yùn)行的系統(tǒng)定期驗(yàn)證)是否仍然完好是確保意外之事不會發(fā)生的極好途徑?,F(xiàn)在一個(gè)編程過的應(yīng)用程序發(fā)生改變的概率是很小的,但考慮每年交付的數(shù)十億個(gè)微控制器以及可能惡劣的工作環(huán)境,應(yīng)用程序崩潰的機(jī)會并不是零。更有可能的是,系統(tǒng)中的一個(gè)缺陷可能導(dǎo)致某一扇區(qū)發(fā)生閃存寫入或閃存擦除,從而破壞應(yīng)用程序的完整性。
主營:世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
⑥銷售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。
⑧Invensys Foxboro(??怂共_):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場輸入/輸出模塊)
順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。
⑨Siemens(西門子):Siemens MOORE,Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等。
⑩Bosch Rexroth(博世力士樂):Indramat,I/O模塊,PLC控制器,驅(qū)動模塊等。
◆Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
WALCHEM WEBMASTER WMT700-1NNADBN COOLING TOWER CONTROL
AVTRON TRIMMER PROGRAMMER D14660 NEW OLD STOCK *LNC*
OMRON 3G2A5-LK005 LINK UNIT * XLNT CONDITION *
ABB ACH501-005-4-00?P2 FREQUENCY AC DRIVE (5 HP)
ABB (ASEA DSPC 153) 2668 180-113/5 GOOD TAKEOUT
MITSUBISHI MELSEC AX80Y80C INPUT/OUTPUT UNIT
ALLEN BRADLEY 209-DSD-010X-DN (ULTRA 3000I DRIVE)
SIEMENS CFD63B100 CIRCUIT BREAKER GOOD TAKEOUT
MAYATECH CORPORATION 464290 BRAND NEW NOT IN BOX
MAYATECH CORPORATION 811077 EDGE OF WEB SENSOR NEW
MOORE APACS 39ACM24BAN (ACM MODULE) GOOD TAKEOUT
SEIKI CNC BOARD B7909204 GOOD TAKEOUT
ALLEN BRADLEY 1336F-BRF100-AA?-EN-HAS2-LA7-L4
ALLEN BRADLEY 1326AB-B2E-11 SERVO MOTOR (REFURBISHED)
ABB ACS350-03U-09A8?-2 DRIVE (3 HP) BRAND NEW!
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LANDMARK GRAPHIC INTERFACE PANEL LMG (115 VOLT)
SPEED SELECTOR 518-100-60 (BRAND NEW) SPEC # TB
OMRON C200H-NC211 (NC UNIT) NEW OLD STOCK
MOORE APACS 39HFM2CAN (HFM MODULE) GOOD TAKEOUT
NIKKI DENSO ACTUS POWER NPSA-20NN-50E8 SERVO CONTROL
HONEYWELL BATTERY TEST CARD 30752783-001 (XLNT COND)
HONEYWELL TRANSCEIVER 30752766-001 (XLNT COND)
HONEYWELL COMMUNICATIONS LOGIC 30752787-002 (XLNT COND)
GIDDINGS & LEWIS 810-21977-01 CONTROL MODULE W/POWER..
NIKKI DENSO ACTUS POWER NPSA-GMDA-401YZ?-A2 GOOD TAKEOUT
RELIANCE ELECTRIC SP500 VS DRIVE 1SU41007 (7.5 HP)
RELIANCE ELECTRIC SP600 AC DRIVE 6SP401-008CTNN (5 HP)
RELIANCE ELECTRIC VS DRIVE 2GC41007 (7.5 HP)
SYMAX 8020SCP401 MODEL 400 PROCESSOR (REFURBISHED)
AUTOTECH CONTROLS SAC-M1051-010 (PRG LIMIT SWITCH)
YASKAWA CACR-SR15SZ1SDY?77 SERVOPACK *XLNT* CONDITION
MITSUBISHI MELSEC K0J2-E56DS SEQUENCE CONTROLLER (NEW)
SIEMENS 6AV6 545-0BC15-2AX0 TP170B COLOR TOUCH PANEL
BRAND NEW IN BOX FACTORY SEALED
STEIMEL PUMP TYP-SKL31/0AK-P (BRASS) 1 1/4 FLANGED) NEW
YOKOGAWA VORTEX FLOWMETER YEWFLO DY040 (1 1/2″) SST NEW
YASKAWA JANCD-1003E SMALL BOARD JANCD-EW02 * LNC *
GE DRIVE 6KGP43005X9XXXA?1 AF-650 GP 5 HP. 460V *XLNT*
GREYLINE INSTRUMENTS OCF-III-CR FLOW MONITOR (BRAND NEW
SIEMENS 6ES5470-4UA11 SIMATIC ANALOG MODULE
SIEMENS 6ES5924-3SA11 CPU MODULE XLNT CONDITION
ABB DSQC 266G 3HAB8801-1/2B ROBOT CONTROL BOARD NEW
FANUC A16B-1212-0270 /05A LASER INTERFACE BOARD *XLNT*
SQUARE D MAL364508041 CIRCUT BREAKER (WITH LUGS) XLNT!
JOY MODEL 33 BASE LOAD CONTROLLER NEW SURPLUS NEVER USE
SIEMENS MLFB6AT1131-8KB?00-0AA0 KEYBOARD NEW IN BOX
PARKER DIGIPLAN 8 AXIS MODULAR DC DRIVE SYSTEM TYPE-UR8
ABB 5692-435-LX ENCODER (BRAND NEW)
NSK BALL SCREW W3606-550ZX-C3Z?16 (32 INCHES) BRAND NEW
CONTRAVES VARIDYN COMPACT ADB/F440.60M (40 KVA) *XLNT*
FANUC A20B-0008-0032 /03A SPINDLE DRIVE TOP BOARD XLNT
ALLEN BRADLEY 1745-PT1 PROGRAMMER FOR SLC 100 NIB W/
ALLEN BRADLEY 1404-M405A-CNT POWERMONITOR 3000
FANUC A860-0326-T002 2500P ABS PULSE CODER GOOD TAKEOUT
YUSHIN ROBOT TEACH PENDANT PULLED FROM WORKING ROBOT
MITSUBISHI ENCODER RFH1024-22-1M-6?8 TYPE TSI508 N85 NEW
ABB AXEM DC MOTOR F9M4 57540 GOOD USED TAKEOFF!
MITSUBISHI MELSEC F2-40M-UA1 CONTROLLER NEW IN BOX
SIEMENS 6ES5 470-7LB12 ANALOG OUTPUT GOOD TAKEOUT
SIEMENS 6ES5 465-7LA11 ANALOG INPUT GOOD TAKEOUT
OKUMA E4809-045-061-D (BDC BOARD GOOD TAKEOUT)
ALLEN BRADLEY 8600 1880L (CPU BOARD) OSAI OS5001V
ALLEN BRADLEY 8600 1882FL (MEMORY MODULE) OSAI OS5241
ALLEN BRADLEY 8600 2163B (CNC BOARD) OSAI OS5330P