GE FANUC A06B-0314-B142#7075現(xiàn)場(chǎng)總線與RS-485總線的主要區(qū)別是：CAN總線是以幀為單位進(jìn)行數(shù)據(jù)通信的，且每幀均攜帶對(duì)應(yīng)的ID標(biāo)示符，而RS-485是以字節(jié)為單位進(jìn)行數(shù)據(jù)通信，不帶任何其它附屬信息。如果不考慮幀中的ID標(biāo)示符，那么這二種總線傳輸?shù)男畔⒕涂梢哉J(rèn)為完全相同。考慮到絕大多數(shù)應(yīng)用CAN總線的場(chǎng)合都不可能分配完系統(tǒng)中的ID標(biāo)示符資源，因而在系統(tǒng)中可以另分配一至多個(gè)ID標(biāo)示符給RS-485總線數(shù)據(jù)，即給總線透明轉(zhuǎn)換電路所用，收、發(fā)數(shù)據(jù)的ID標(biāo)識(shí)符可以不相同。CAN總線系統(tǒng)中的公用主控設(shè)備一般被設(shè)置成直通狀態(tài)，它可通過發(fā)送、接收具有不同ID標(biāo)示符的不同數(shù)據(jù)幀，方便地對(duì)網(wǎng)絡(luò)中的各種設(shè)備進(jìn)行管理和控制。對(duì)那些純粹靠幀數(shù)據(jù)本身而忽略ID標(biāo)志符的系統(tǒng)來說，這種不同總線之間的轉(zhuǎn)換更加簡(jiǎn)單。

GE FANUC A06B-0314-B142#7075實(shí)現(xiàn)二種總線之間的透明轉(zhuǎn)換的基本過程是這樣的：電路加電進(jìn)入正常狀態(tài)后，首先以電路中保存的參數(shù)（如未初始化則以缺省參數(shù)）對(duì)二個(gè)總線通信端口分別進(jìn)行初始化，并將所有通訊端口設(shè)置成中斷接收工作方式，在啟動(dòng)內(nèi)部看門狗（SWatchdog）后，電路等待外來數(shù)據(jù)的中斷。一旦某一總線端口有有效數(shù)據(jù)進(jìn)入，電路首先將這些數(shù)據(jù)讀入內(nèi)部數(shù)據(jù)緩沖區(qū)，置相關(guān)內(nèi)部標(biāo)志，關(guān)閉其它端口的中斷，以使接收端數(shù)據(jù)能及時(shí)被接收到。在下一數(shù)據(jù)到來之前，電路將及時(shí)通過另一端口將緩沖區(qū)中的數(shù)據(jù)轉(zhuǎn)發(fā)出卻，直到緩沖區(qū)空。在這種轉(zhuǎn)換過程中，如果數(shù)據(jù)是自CANBUS一端流入，則電路只將幀內(nèi)數(shù)據(jù)讀入到緩沖區(qū)。相反，則電路在轉(zhuǎn)發(fā)數(shù)據(jù)之前自動(dòng)按設(shè)置將設(shè)定ID標(biāo)示符加到發(fā)送信息中，一旦轉(zhuǎn)換過程結(jié)束，所有端口又被允許中斷接收。電路中緩沖區(qū)一般可配置8k～32K字節(jié)的靜態(tài) RAM。

GE Fanuc IC660ELD100G 115V In/Out Genius IC660ELD100-G

Square D Breaker IKL36225 IK 225Amp A 225A IKL

GE 9F62DCB200 200E Fuse 5.5kV EJ0-1 General Electric

LEM LT-200-S Current Module 200A 1:2000 LT200S

Siemens 1FT6105-8AC71-3?AA1 3000 RPM Servo Motor NEW

Bussmann FRS-R-70 Fusetron 70A Fuse RK5 600V A Amp NIB

Texas Instruments 6MT31 16 Input Logic Interface Module

Crompton 077-219A-QX 0-3000 AC Kilowatts Meter 3500/5

TI Texas Instruments 6MT14-40CL DC Output 6MT1440CL

FPE Transformer 20 kVA 460/460Y/266 V 460 Y 20kVA 3PH

Siemens/Allis RD-110 Current Transformer 800:5 A 5A

Allen Bradley AB 1336F-B075-AA-E?N 75 HP 480V NIB New 

Siemens/Allis RD-110 Current Transformer 1600:5 A 5A

Yaskawa JGSM-06 Position Cont Unit 73051-00060 JGSM06

Siemens/Allis RD-110 Current Transformer 400:5 A 5A

Allen Bradley AB 1336F-B060-AA-E?N 60 HP 460V NIB New 

Siemens/Allis RD-210 Current Transformer 3200:5 A CT

Yaskawa JGSM-15 Comparator Unit 73051-00150 JGSM15

Siemens 1FT6105-8AC71-3?AA1 5600 RPM 3 Phase Motor NEW

Kollmorgen BDS4A-203J-0001??B21P Servo Drive/Amp

Square D Transformer 30 kVA 480/208Y/120 3Ph 30kVA 

Bolted Pressure Contact Switch J365 X3 ST 400 Amp 600 V

AB Allen Bradley 2805-LB CPU 256K CPU Ser C 2805LB NEW

K-Tron 9191-70003 Control Card KTron 919170003

Bolt Loc Bolted Pressure Switch VLB 349 ST 1600A 480V

Bolt Loc Bolted Pressure Switch VL 3612 3000 Amp 600 V

Bolt Loc Bolted Pressure Switch VL 3612 G5 3000 Amp Gnd

Allen Bradley Size 1 Breaker 15 A Reversing MCC Bucket

Bolt Loc Bolted Pressure Switch VL 3610 G6 2000 Amp Gnd

Bolt Loc Bolted Pressure Switch VL 369 ST 1600 Amp 600V

Bolted Pressure Contact Switch J364 W0L 200 Amp 600 V

Anderson Pharmaceutical Series PSI Gauge -1 to 2.0 bar

Westinghouse Sz 3 Combination Starter 2 Speed Reversing

6SN1145-1AA00-0AA0     6SN1145-1AA00-0CA0      6SN1145-1AA01-0AA0      6SN1145-1AA01-0AA1

6SN1145-1AA01-0AA2     6SN1145-1BA00-0BA0      6SN1145-1BA00-0CA0      6SN1145-1BA00-0DA0

6SN1145-1BA01-0BA0     6SN1145-1BA01-0BA1      6SN1145-1BA01-0BA2      6SN1145-1BA01-0DA0

6SN1145-1BA01-0DA1     6SN1145-1BA02-0CA0     6SN1145-1BA02-0CA1      6SN1145-1BA02-0CA2

6SN1145-1BB00-0DA0     6SN1145-1BB00-0DA1     6SN1145-1BB00-0EA0      6SN1145-1BB00-0EA1

6SN1145-1BB00-0FA0     6SN1145-1BB00-0FA1

Anderson Pharmaceutical Series Pressure Gauge 0-100 PSI

Cutler Hammer Size 4 Combination Starter Breaker 150 A

Mitsubishi Breaker NF 100-SS 60 Amp 60Amp 60A A

Siemens 1FK7060-5AF71-1?EH0 7200 RPM 3 Phase Motor NEW