描述
基本定時(shí)器為減1計(jì)數(shù),當(dāng)程序進(jìn)入運(yùn)行狀態(tài)后,定時(shí)控制邏輯行接通的瞬間定時(shí)器開始工作。工作過程是(以例題4-16為例說明)先將設(shè)定值寄存器SV5中的內(nèi)容裝入經(jīng)過值寄存器EV5中。然后每經(jīng)過一個(gè)定時(shí)時(shí)鐘0.1s(例題是TMX5所以定時(shí)時(shí)鐘是0.1s)EV5中的內(nèi)容做減1計(jì)數(shù),直至EV5中內(nèi)容為0,該定時(shí)器對應(yīng)的常開觸點(diǎn)T5閉合,常閉觸點(diǎn)T5斷開。此后若定時(shí)器控制邏輯行一直保持接通狀態(tài),則其觸點(diǎn)動作保持,直至控制邏輯行斷開,各觸點(diǎn)復(fù)位。若控制邏輯行接通時(shí)間未達(dá)到定時(shí)器設(shè)定時(shí)間就斷開,定時(shí)器觸點(diǎn)不動作,EV5復(fù)位直至控制邏輯行再次接通,重新開始計(jì)時(shí)。定時(shí)器工作過程順序如圖4-33所示。后續(xù)課程學(xué)習(xí)了高級指令后可利用高級指令修改SV5中的數(shù)據(jù),從而改變定時(shí)器的設(shè)定時(shí)間。也可以調(diào)出EV5中的數(shù)據(jù)進(jìn)行其它操作。
歐美品牌停產(chǎn)的,常用的“PLC”備品備件
我司產(chǎn)品應(yīng)用于以下領(lǐng)域:
1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》
2,《智能平鋼化爐系統(tǒng)制造》
3,《PLC可編程輸送控制系統(tǒng)》
4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》
6,《化工廠藥液恒流量計(jì)算機(jī)控制系統(tǒng)》
7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動化控制系列
本特利,英維思,伍德沃德,福克斯波羅、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。
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Brad Harrison 702P801
Brad Harrison 702P801 Multi-Port Interconnect System
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Brad Harrison 116020A01F300 Cordset
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BRAD HARRISON 23301 NSFP 23301
BRAD HARRISON DND8000 NSFP DND8000
BRAD HARRISON 5054-1 NSFP 50541
BRAD HARRISON 712P601 MULTIPORT INTERCONNECT SYSTEM NEW
BRAD HARRISON 47212 USPP 47212
BRAD HARRISON DN-PT3 NSFP DNPT3
BRAD HARRISON 332020A01F200 USPP 332020A01F200
Brad Harrison 409P495 Interconnect System NEW
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Brad Harrison 302101A04M100 Cable 12P Female Connector
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BRAD HARRISON 47290 NSPP 47290
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BRAD HARRISON 42884 NSFP 42884
BRAD HARRISON 1093-3 NSFP 10933
NIB BRAD HARRISON DN8000 DEVICENET PASSIVE MPIS
NEW Brad Harrison/Woodhead 8R3E06A18M0201 LOT OF 10
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BRAD HARRISON BTY802P-FBP NSFP BTY802PFBP
BRAD HARRISON 43321 SAFETY PLUG 4-PIN ANGLED
BRAD HARRISON Interconnect System 803P601 MPIS
BRAD HARRISON Interconnect System 410P601 MPIS
BRAD HARRISON 411P801 NSPP 411P801
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BRAD HARRISON 702P801 NSFP 702P801
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CABLE JUNCTION WOODHEAD BRAD HARRISON 332121B04M100
BRAD HARRISON 47288 NSFP 47288
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Brad Harrison 409P403 Interconnect System NEW
Brad Harrison 413P401 Interconnect System NEW
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Brad Harrison DN4100 Multi-Port Interconnect System
BRAD HARRISON 409P601 NSFP 409P601
BRAD HARRISON DN6000 USPP DN6000
NEW Brad Harrison/Woodhead 1R3D06A25A120
NEW Brad Harrison/Woodhead 1R5004A24F030
BRAD HARRISON 208000A04M050 5M MPSI/8P FEMALE
BRAD HARRISON 331020A01F200 NEW CORDSET 20′
Brad Harrison 3R9004A20A120 9P Female Straight 3pc lot
EK-809 BRAD HARRISON 41307-90+MINI CHANGE CORDSET 22+
BRAD HARRISON 116020A01F300 NSFP 116020A01F300
BRAD HARRISON 4002 NSFP 4002
BRAD HARRISON Interconnect System 410P601 MPIS
BRAD HARRISON BTY801P-FBB NSFP BTY801PFBB
BRAD HARRISON 47578-050 NSFP 47578050
BRAD HARRISON 47578-100 NSFP 47578100