FISHER-ROSEMOUNT DELTA V KJ2003X1-BB1 MDPlus Controller VE3006
FISHER-ROSEMOUNT DELTA V KJ2003X1-BB1 MDPlus Controller VE3006
FISHER-ROSEMOUNT DELTA V KJ2003X1-BB1 MDPlus Controller VE3006
ANELVA A12-74514 ONE PIECE ELECTRODE COVER (CATHODE)
ANELVA A12-75163 INTERMEDIATE RING (CATHODE)
ANELVA A12-77089 ANELVA 12 HOLE DEPO RING FOR AL-CU KITS
ANELVA A12-79742 COUNTER ELECTRODE (DIA.306) COVER (ANODE)
ANELVA A12-81093 LONG THROW TI & LONG THROW TIN 4 PIECE TARGET FIXTURE
ANELVA A13-00349 PLATE FIXTURE
ANELVA A13-02288-03A CYLINDER, BELLOWS
ANELVA A13-02349 CONTROLLER DISPLAY MASTER
ANELVA A13-06256 FLANGE, LOWER, WELDED
ANELVA A13-07103 FLOW METER, PCB
ANELVA A13-10256 QUARTZ ARM POINT FIND JIG (6")
ANELVA A13-10292 PIN, PNT, JS, ARM, QUARTZ
ANELVA A13-26379 POWER CONTROLLER 2.5KW
ANELVA A13-30252 FULL SIZE EXTENDER
ANELVA A13-30291 PC BOARD ASSY HALF SIZE EXTENDER
ANELVA A13-32336 CONVERTER A/D 8 CHANNEL
ANELVA A13-32338 CONVERTER D/A 8 CHANNEL
ANELVA A13-34807 CA AMP PCB
ANELVA A13-40566 SHIELD, TARGET FIXTURE (2 PIECES)
ANELVA A13-41615 SHIELD 6" QUARTZ HOLDER
ANELVA A13-41847 VENT REGULATOR
ANELVA A13-52956 SHIELD, COVER S-PMC
ANELVA A13-56218 ETCH CHAMBER SHIELD PLATE (FRONT)
ANELVA A13-56219 ETCH CHAMBER SHIELD PLATE (BACK)
ANELVA A13-59873 HEATER CIRCULAR PY190
ANELVA A13-59874 CIRCULAR HEATER PY 134
ANELVA A13-62899 SHIELD, CHAMBER, RT
ANELVA A13-62900 SHIELD, CHAMBER, LEFT (SEND OU)
ANELVA A13-62901 SHIELD, CC CHAMBER (A)
ANELVA A13-62902 SHIELD, CC CHAMBER (B)
ANELVA A13-62904 SHIELD, CC CHAMBER (D)
ANELVA A13-62910 SHIELD, CC COVER (2)
ANELVA A13-65121 VACUUM GUAGE QIG-066
ANELVA A13-67554 SHIELD PLATE GT
ANELVA A13-68630 WAFER HOLDER 6" S/S
ANELVA A13-73362 FPC FIITING PCB ASSY
ANELVA A13-77606 12" PMC HIGH MELTING POINT 292 TARGET SHIELD (AL)
ANELVA A13-78712 SOLID SHIELD FOR CATHODE FLANGE (UP) (SUS)
ANELVA A13-80409-4 TARGET (292" AL)
ANELVA A13-81258 292 RING
ANELVA A13-98082 110 RING
ANELVA A13-98088-UK GLASS 184X64 ANE
ANELVA A14-02156 BELT ASSY A CL
ANELVA A14-02157 BELT ASSY
ANELVA A14-02832 CATHODE HOUSING ROTARY ASSEMBLY
ANELVA A14-03586 LAMP HEATER 500W
ANELVA A14-05151-UK GAS SPRING FOR SP
ANELVA A14-12740 VACUUM WANDPLATE PY8" ASSEMBLY
ANELVA A14-14262 BOTTOM PLATE COVER (1)
ANELVA A14-17384 COUNTER ELECTRODE COVER (DIA.306) ANODE
ANELVA A14-17430-UK BEVEL GEAR (DYFLON)
ANELVA A14-20021 ANELVA 4 PIECE TARGET COVER FOR TIN KIT ONLY
ANELVA A14-21939 FLANGE
ANELVA A14-22957 296 SHUTTER PLATE
ANELVA A14-23175 95 CIRCLE HEATER
ANELVA A14-23499 BOTTOM PLATE COVER (2)
ANELVA A14-23500 BOTTOM PLATE COVER (6)
ANELVA A14-23501 BOTTOM PLATE COVER (3)
ANELVA A14-23502 BOTTOM PLATE COVER (5)
ANELVA A14-25253 CERAMIC HEATER COMPLETE SP
ANELVA A14-32312 THERMOCOUPLE WITH PY32 VG FLANGE
以太網(wǎng)傳輸速度快,數(shù)據(jù)量又大,為什么我看到工程機械系統(tǒng)里全都是以CAN總線來進行通信,這種場合下,CAN總線的優(yōu)點比以太網(wǎng)好在哪里?
答:1、控制器局域網(wǎng)(controllerareanetwork 簡稱CAN)zui初是德國Bosch公司于1983年為汽車應(yīng)用而開發(fā)的,一種能有效支持分布式控制和實時控制的串行通訊網(wǎng)絡(luò),屬于現(xiàn)場總線(FieldBus)的范疇。
2、看到工程機械系統(tǒng)里全都是以CAN總線來進行通信?
轉(zhuǎn)帖:
因為CAN總線為汽車應(yīng)用而開發(fā)的,目前CAN-BUS總線在車上的應(yīng)用越來越普及的結(jié)果。車上的CAN-BUS總線一般有三種:高速的動力驅(qū)動系統(tǒng)(速率可達到500kb/s以上)主要連接對象包括發(fā)動機ECU、ABSECU、SRSECU、組合儀表等;低速的CAN總線則用于車身舒適系統(tǒng)(速率100kb/s),連接對象有集控鎖、電動門窗、后視鏡、廂內(nèi)照明燈等;另外可能還會有用于衛(wèi)星導(dǎo)航的智能通訊系統(tǒng)。
3、CAN總線的優(yōu)點比以太網(wǎng)好在哪里?
各有千秋,各有各的用途。提不到哪個比哪個好。如果CAN總線的優(yōu)點比以太網(wǎng)好,那以太網(wǎng)就不會存在了。
CAN總線的特點是沒有主站和從站之分的,他是利用報文的頭來定義接收對象的,就是1個報文,既可以只有一個接收對象,也可以有多個對象,甚至是全部對象,
他的原理是,想發(fā)送數(shù)據(jù)的對象,在發(fā)送前,先檢查總線上是否有人在發(fā)送,如果有,則要等,如沒有則就可以發(fā)送
但如果在一個時刻的2個站,都想發(fā)送數(shù)據(jù),但檢查總線的時候,總線是空閑的,則大家都開始往總線上發(fā)送數(shù)據(jù),但由于2個站都發(fā)送數(shù)據(jù),勢必會造成數(shù)據(jù)混亂,這也叫碰撞,
那么以太網(wǎng)技術(shù)的,那么這兩個站的數(shù)據(jù),大家都要報廢,然后內(nèi)部有一個延時,延時后,其中一個再重發(fā)
但CAN總線不是,在同一時刻,雖然有2個站都在發(fā),但CAN的報文有優(yōu)先級別的,就是優(yōu)先級別高的報文,會繼續(xù)發(fā)送,并且不會破壞報文的數(shù)據(jù),優(yōu)先級別低的報文,就不行了,要等高級別的報文發(fā)送完畢后,在開始發(fā)送
那么CAN是怎么做到2個站同時發(fā)送時,高級別的優(yōu)先,并且發(fā)生碰撞時,高級別的數(shù)據(jù)不會報廢呢,
就是CAND報文頭有一個報文識別碼,說簡單點就是發(fā)送由1和0組成的報文頭,
假設(shè)A設(shè)備的報文頭是00001111
B設(shè)備的報文頭是 00011000
則A的報文優(yōu)先級比B的高,為什么呢
因為我們同時往一個總線上發(fā)送1和0,那么此時總線上得到的邏輯電平應(yīng)該為0
CAN總線上的通信設(shè)備,是邊發(fā)送,邊監(jiān)聽的,
就是A發(fā)送一個0后,他會檢查總線上的電平是否是0,如果是0則繼續(xù)發(fā),如果是1,說明有更高優(yōu)先級別的報文出現(xiàn),那么A將停止發(fā)送
直到總線空閑后,重新發(fā)送
那么CAN的優(yōu)點就是,能保證zui重要的報文優(yōu)先傳送,這對于汽車上面,或者設(shè)備上面有關(guān)安全方面的報文能*時間得到處理。