3HAC025834-001
3HAC025834-001
3HAC025834-001
3HAC025834-001
從可靠性來(lái)說(shuō)，IPC要比單片機(jī)要好得多，但其價(jià)格昂貴，
不計(jì)其整機(jī)價(jià)格，單就要滿足I/O點(diǎn)數(shù)據(jù)的板卡量（32通道，約10塊）費(fèi)用就不少，其價(jià)格要遠(yuǎn)遠(yuǎn)高于采用PLC控制的價(jià)格。
更為重要的是工控機(jī)更新?lián)Q代較快，不但硬件如此，而且最根本的操作系統(tǒng)也不斷地更新?lián)Q代，換句話說(shuō)，如果設(shè)備控制系統(tǒng)出現(xiàn)故障，更換硬件，可能意味著更新操作系統(tǒng)，進(jìn)而導(dǎo)致整個(gè)系統(tǒng)的應(yīng)用軟件（包括界面）都要重新設(shè)計(jì)（或開發(fā)），這對(duì)太多數(shù)用戶來(lái)說(shuō)是不能接受的。
所以，本人認(rèn)為此方案也不適用。
3 PLC控制
· 可靠性
自第一臺(tái)PLC誕生就是應(yīng)用于工業(yè)現(xiàn)場(chǎng)控制，不可否認(rèn)，PLC的
可靠性得到了工控業(yè)界的認(rèn)可。據(jù)最近行業(yè)統(tǒng)計(jì)顯示，目前采用PLC控制的設(shè)備份額達(dá)90％。
· 成本低
就此設(shè)備的控制來(lái)說(shuō)，采用PLC來(lái)進(jìn)行的設(shè)備開發(fā)和控制費(fèi)用
都要遠(yuǎn)遠(yuǎn)低于采用單片機(jī)或IPC的費(fèi)用，其系統(tǒng)可大可小，小的幾點(diǎn)，大的數(shù)千點(diǎn)，甚至上萬(wàn)點(diǎn)，很好解決工業(yè)控制問題，適用于很多場(chǎng)合。
· 開發(fā)周期短
采用PLC進(jìn)行設(shè)備控制，工程師無(wú)須花太多的精力在硬件的處理上，采用積木式結(jié)構(gòu)很快可以形成系統(tǒng)電路，大部分精力集中在工藝的了解處理和程序的編寫上，有利于設(shè)備的快速開發(fā)，程序的編輯、修改和調(diào)試也都可隨時(shí)進(jìn)行，縮短了開發(fā)時(shí)間。
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WINSMITH 943MWN10LR132-R?5 METRIC SPEED REDUCER 10:1全國(guó)低價(jià),歡迎來(lái)電!
WINSMITH 943MWN50LR90-B1?4 METRIC SPEED REDUCER 50:1全國(guó)低價(jià),歡迎來(lái)電!
WINSMITH 943MWN30LR100-B?14 METRIC SPEED REDUCER 30:1全國(guó)低價(jià),歡迎來(lái)電!
GE AZ55H12DAB 1 TON PACKAGED AC/HP UNIT 208-230V 15418全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 18 1/2" ROOF EXHAUST VENTILATOR 41949全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 21 1/4" ROOF EXHAUST VENTILATOR 157949全國(guó)低價(jià),歡迎來(lái)電!
ANDWIN SCIENTIFIC HX2138 PLATFORM ROCKER 146140全國(guó)低價(jià),歡迎來(lái)電!
COPELAND ZR125KC-TF7-250 10.5T SCROLL AC/HP COMPRESSOR全國(guó)低價(jià),歡迎來(lái)電!
GOODMAN ARPF18241 1.5-2 TON MULTI-POSITION FAN COIL全國(guó)低價(jià),歡迎來(lái)電!
3M VOL-H62P1 HORIZONTAL 62.5/125 2 FIBER PLENUM 3280'全國(guó)低價(jià),歡迎來(lái)電!
RHEEM RGLR-12EARMR 125,000 BTU 2-STAGE 80% GAS FURNACE全國(guó)低價(jià),歡迎來(lái)電!
BLACK BOX 82120-1000 RG6/U COAX CABLE 1000' REEL 159874全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 14-3/4" EXHAUST VENT/CENTRIFUGA?L UPLAST 159266全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 16 1/2" 115-208-230V ROOF EXHAUST VENTILATOR全國(guó)低價(jià),歡迎來(lái)電!
APC SU2200RMI3U UNINTERRUPTIBLE POWER SUPPLY 155378全國(guó)低價(jià),歡迎來(lái)電!
BRINKMAN LAB. SYSTEMS 09548332 SENSOR SET F/B721 CV全國(guó)低價(jià),歡迎來(lái)電!
NEXAIN 530645 50 PAIR PLENUM CABLE 838'全國(guó)低價(jià),歡迎來(lái)電!
ALLTECH AGILENT GC COL DB-624-75M-MEGA?-3.0UM 125-1374全國(guó)低價(jià),歡迎來(lái)電!
YORK 2PE04703025 3-6 TON POWER EXHAUST 150784全國(guó)低價(jià),歡迎來(lái)電!
BLACK BOX LB1301A-SM40 TX (TO) FX CONVERTER 163078全國(guó)低價(jià),歡迎來(lái)電!
FRIEDRICH EM18M34-A 17,500 BTU WINDOW AIR CONDITIONER全國(guó)低價(jià),歡迎來(lái)電!
BLACK BOX CDT400A-R4 T4 FOUR CD TOWER 147833全國(guó)低價(jià),歡迎來(lái)電!
THERMO SCIENTIFIC ORION DURAPROBE CONDUCTIVITY 013150A全國(guó)低價(jià),歡迎來(lái)電!
BLADEX INC 22080086 SHARPS COLLECTOR 159123全國(guó)低價(jià),歡迎來(lái)電!
KOHLER 505-96 MENDOTA 5' BATH TUB LEFT OUTLET BISCUIT 全國(guó)低價(jià),歡迎來(lái)電!
ELKAY LCCR3232 GOURMET DOUBLE BOWL CORNER SINK 159017全國(guó)低價(jià),歡迎來(lái)電!
CUNO CWS200ME AQUA-PURE WATER SOFTENER 160663全國(guó)低價(jià),歡迎來(lái)電!
LIGHT CRIMP SC TERMINATION KIT 147765全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 18 1/2" EXHAUST VENTILATOR 1/4-2 HP 158274全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 18 1/2"EXHAUST VENTILATOR 1/4 TO 2 HP 158274全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 18 1/2"EXHAUST VENTILATOR 1/4-2 HP 158274全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 24" TUBEAXIAL FAN/DIRECT DRIVE 160083全國(guó)低價(jià),歡迎來(lái)電!
BLACK BOX AC1063A-DA CAT5 MULTI-VIDEO RECIEVER 164539全國(guó)低價(jià),歡迎來(lái)電!
BLACK BOX KV6104SA# SERVSWITCH DUO 4 PORT 155241全國(guó)低價(jià),歡迎來(lái)電!
JACUZZI 9230959 42" X 60" WHITE WHIRLPOOL BATH 160803全國(guó)低價(jià),歡迎來(lái)電!
FIRST COMPANY 09SPX4HP 9000BTU PKG TERMINAL HEAT PUMP全國(guó)低價(jià),歡迎來(lái)電!
BLACK BOX SW700A-ST-MM-E FALLBACK SWITCH 153130全國(guó)低價(jià),歡迎來(lái)電!
JOHNSON CONTROLS V5842-15 6" 3-WAY MIXING VALVE 59959全國(guó)低價(jià),歡迎來(lái)電!
CARLYLE 06DA31336FA0400 5 HP SEMI HERMETIC COMPRESSOR全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 13-1/4" EXHAUST VENTILATOR 115/208-230V 164953全國(guó)低價(jià),歡迎來(lái)電!
TRANE 2TEH3F42A1000A 3-1/2TON AC FAN COIL UP/HORIZONTAL全國(guó)低價(jià),歡迎來(lái)電!
DAYTON 13-1/4" EXHAUST VENTILATOR 115/208-230V 164953全國(guó)低價(jià),歡迎來(lái)電!
DAYTON EXHAUST VENTILATOR 13-1/4" 115/208-230V 164953全國(guó)低價(jià),歡迎來(lái)電!
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