8、I/O單元和CPU單元是如何連接的?
I/O單元與CPU是通過(guò)現(xiàn)場(chǎng)總線連接的。
9、 什么是現(xiàn)場(chǎng)總線?
現(xiàn)場(chǎng)總線是應(yīng)用于控制現(xiàn)場(chǎng)的一種數(shù)字網(wǎng)絡(luò)，它不僅包含有控制信息交換，而且還包含設(shè)備信息的交流。通過(guò)現(xiàn)場(chǎng)總線，各種智能設(shè)備(智能變送器、調(diào)節(jié)法、分析儀和分布式I/O單元)可以方便地進(jìn)行數(shù)據(jù)交換，控制策略可以完全在現(xiàn)場(chǎng)設(shè)備層次上實(shí)現(xiàn)。目前，使用較多的現(xiàn)場(chǎng)總線主要是FUNDATION fieldbus會(huì)現(xiàn)場(chǎng)總線(FF總線)和PROFIBUS現(xiàn)場(chǎng)總線。應(yīng)用現(xiàn)場(chǎng)總線技術(shù)可以將各種分布在控制現(xiàn)場(chǎng)的相關(guān)智能設(shè)備和I/O單元方便的連接在一起，構(gòu)成控制，這種結(jié)構(gòu)已經(jīng)成為DCS發(fā)展的趨勢(shì)。
STD725-F2AS1AS-2-A-EHT-11C-A-41A2-01-0000
STD725-J2AS1AS-3-B-FHT-12C-B-51A2-02-0000
STD725-A1HS1AS-1-C-GHT-13C-A-61A2-03-0000
STD725-B1HS1AS-2-D-HHT-14C-B-71A2-04-0000
STD725-E1HS1AS-3-E-AH0-11S-A-00A6-00-0000
STD725-F1HS1AS-1-F-BH0-12S-B-10A6-FG-0000
STD725-J1HS1AS-2-G-CH0-13S-A-20A6-F7-0000
STD725-A2HS1AS-3-I-DH0-14S-B-30A6-MT-0000
STD725-B2HS1AS-1-0-EH0-11C-A-40A6-FX-0000
STD725-E2HS1AS-2-A-FH0-12C-B-50A6-F3-0000
STD725-F2HS1AS-3-B-GH0-13C-A-60A6-F1-0000
STD725-J2HS1AS-1-C-HH0-14C-B-70A6-F5-0000
STD725-A1AN1AS-2-D-AHA-11S-A-01A6-FE-0000
STD725-B1AN1AS-3-E-BHA-12S-B-11A6-TP-0000
STD725-E1AN1AS-1-F-CHA-13S-A-21A6-OX-0000
STD725-F1AN1AS-2-G-DHA-14S-B-31A6-PM-0000
STD725-J1AN1AS-3-I-EHA-11C-A-41A6-01-0000
STD725-A2AN1AS-1-0-FHA-12C-B-51A6-02-0000
STD725-B2AN1AS-2-A-GHA-13C-A-61A6-03-0000
STD725-E2AN1AS-3-B-HHA-14C-B-71A6-04-0000
STD725-F2AN1AS-1-C-AHS-11S-A-00A7-00-0000
STD725-J2AN1AS-2-D-BHS-12S-B-10A7-FG-0000
STD725-A1HN1AS-3-E-CHS-13S-A-20A7-F7-0000
STD725-B1HN1AS-1-F-DHS-14S-B-30A7-MT-0000
STD725-E1HN1AS-2-G-EHS-11C-A-40A7-FX-0000
STD725-F1HN1AS-3-I-FHS-12C-B-50A7-F3-0000
STD725-J1HN1AS-1-0-GHS-13C-A-60A7-F1-0000
AA10VO28DFLR/31L-PSC61N00
AA10VO28DRG/31R-PSC12H00-SO381
A10VO28DFR1/31R-PSC62K01
A10VO28DFR/31L-VSC62K01
AA10VO28DR/31R-PKC61N00
A10VO28DR/31L-PSC12K01
A10VO28DFR/31R-PSC62K02
AA10VO28DR/31R-PSC62G44
A10VO45DFLR/31L-PSC62N00
A10VO45DFLR/31L-VRC12K04
A10VO45DFLR/31L-VSC12K01
A10VO45DFLR/31L-VSC61N00SO793
A10VO45DFLR/31L-VSC62K04
A10VO45DFLR/31L-VSC62N00SO793
A10VO45DFLR/31R-PRC12K04
A10VO45DFLR/31R-PSC11N00-593
A10VO45DFLR/31R-PSC12K01
A10VO45DFLR/31R-PSC12K01-160
A10VO45DFLR/31R-PSC12K01-659
A10VO45DFLR/31R-PSC12K01-813
A10VO45DFLR/31R-PSC12N00-456
A10VO45DFLR/31R-PSC12N00-681
A10VO45DFLR/31R-PSC12N00-813
A10VO45DFLR/31R-PSC62K04
A10VO45DFLR/31R-PSC62K68
A10VO45DFLR/31R-PSC62N00
A10VO45DFLR/31R-VRC11N00
A10VO45DFLR/31R-VRC12K04
A10VO45DFLR/31R-VSC12K01
A10VO45DFLR/31R-VSC62K01
A10VO45DFR/31L-PRC12K04
