描述
30產(chǎn)生的脈沖信號(hào)是X1脈沖信號(hào)的二分頻。圖5-16b中用了三個(gè)輔助繼電器M160、M161和M162。當(dāng)輸入X1在t1時(shí)刻接通(ON),M160產(chǎn)生脈寬為一個(gè)掃描周期的單脈沖,Y30線圈在此之前并未得電,其對(duì)應(yīng)的常開觸點(diǎn)處于斷開狀態(tài),因此執(zhí)行至第3行程序時(shí),盡管M160得電,但M162仍不得電,M162的常閉觸點(diǎn)處于閉合狀態(tài)。執(zhí)行至第4行,Y30得電(ON)并自鎖。此后,多次循環(huán)掃描執(zhí)行這部分程序,但由于M160僅接通一個(gè)掃描周期,M162不可能得電。由于Y30已接通,對(duì)應(yīng)的常開觸點(diǎn)閉合,為M162的得電做好了準(zhǔn)備。
等到t2時(shí)刻,輸入X1再次接通(ON),M160上再次產(chǎn)生單脈沖。此時(shí)在執(zhí)行第3行時(shí),M162條件滿足得電,M162對(duì)應(yīng)的常閉觸點(diǎn)斷開。執(zhí)行第4行程序時(shí),Y30線圈失電(OFF)。之后雖然X1繼續(xù)存在,由于M160是單脈沖信號(hào),雖多次掃描執(zhí)行第4行程序,Y30也不可能得電。在t3時(shí)刻,X1第三次ON,M160上又產(chǎn)生單脈沖,輸出Y30再次接通(ON)。t4時(shí)刻,Y30再次失電(OFF),循環(huán)往復(fù)。這樣Y30正好是X1脈沖信號(hào)的二分頻。由于每當(dāng)出現(xiàn)X1(控制信號(hào))時(shí)就將Y30的狀態(tài)翻轉(zhuǎn)(ON/0FF/ON/0FF),這種邏輯關(guān)系也可用作觸發(fā)器。
除了以上介紹的幾種基本程序外,還有很多這樣的程序不再一一列舉,它們都是組成較復(fù)雜的PLC應(yīng)用程序的基本環(huán)節(jié)。
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(dòng)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。
MOTOROLA MBX860-002C EBX BOARD 01-W3527F
MOTOROLA CPN5360 PROCESSOR CARD+IBM 6.5GB HARD DRIVE
TELEGATE QTE AS1615 EL1 MODULE
MOTOROLA PROCESSOR CARD+IBM 10.06 GB HARD DRIVE
TELEGATE QTE AS1890 MAC MODULE
MOTOROLA BOARD 01-W3739F
JASPER DPCI204-1022-4-M1131 DC DPCI 204-4-M1131
MOTOROLA MVME 147-022 VME BOARD 01-W3964B MVME147-022
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MOTOROLA MCP750 HA 01-W3378F MCP 750 MCP750HA 01-W3336F
IRONICS IV3234 VME 16 SIO BOARD VM-3234-10
MOTOROLA CompactPCI PROCESSOR MODULE A93429-011 cPCI
ACT TECHNICO TVME712 VME BOARD PN:3204194G1 REV B
RADISYS EPC-3305 CPU BOARD EPC 3305 W/P-III 500Mhz 6GB
JASPER DPCI204-1022-4-NN DC DPCI 204-1022-4-NN
ARTESYN BajaSpan 10000212-00 8 PORT E1 BOARD
ARTESYN BajaSpan 10001532-01 E1 cPCI PROCESSING BOARD
ARTESYN BajaSpan 10000080-06 E1 cPCI PROCESSING BOARD
KONTRON PEP CP6000 CPCI/PICMG PENTIUM M EMBEDDED BLADE
KONTRON PEP CP330 UNIVERSAL XGA GRAPHICS CONTROLLER
MOTOROLA MVME 334B VME BOARD 01-W3875B MVME334B
MOTOROLA MVME162-522A VME BOARD 01-W3960B MVME 162-522A
MOTOROLA MVME162-432 01-W3960B MVME 162-432
MOTOROLA MCPN750A cPCI VME BOARD MCP750 01-W3611F
MOTOROLA MVME BOARD 01-W3580F W/01-W3186F
KONTRON CTM80-2 REAR I/O T6701AC FOR DT64/CP6010/CP6?000
KONTRON PEP CP602 CPU BOARD FOR CompactPCI SYSTEM CP600
MOTOROLA MVME 334A VME BOARD 01-W3726B MVME334A
KONTRON PEP CP610 CPU BOARD FOR CompactPCI SYSTEM CP600
GENERAL STANDARDS CORP.PMC-SI104-ECI3 BOARD
MOTOROLA MVME162-032 VME BOARD 01-W3884B MVME 162-032
MOTOROLA REAR I/O PEAM SLOT 1 BOARD 63-305-0018 NEW
LIS 073320-183 CLOCK PROCESSOR 133 BLADE
COMPACT PCI 100P172820 120P243641 BLADE
PERFORMANCE TECHNOLOGIES CompactPCI CPC4401 SWITCH
MANGO DSP MVP-03229 BOARD MVP 03229 MVP03229 NEW
LEICA 301-389.040 VME BOARD
ANORAD 000-71003824-00 VME BOARD
ANORAD 000-71003821-00 VME BOARD
DY 4 Systems DMV-739 900816-005 DY-4 DMV739
DY 4 Systems DMV-783 901163-603 DY-4 DMV783
SIEMENS ULAF+OMI SNMP S3119-Q300-A310?-1
MOTOROLA MVME 162-013A BOARD MVME162-013A 01-W3884B
AGILENT E7300B QA ROBOT(700MHz)CPU Pentium-3256MB RAM
IML ARTEMUX IML-S007 S007-155-SMF NMS PN:50174
NIKON 4S007-776 ALG SIG BLADE
SPINNER I/O BOARD TKB2111 CPC-G223B01A-11
ECI TR28T BLADE TR2-8T 882-091
MARCH NETWORKS VTU 2103 MULTI MEDIA MODULE 11870 12168
TELEXIS CORP VTU 2100 MB W/5-VOLT 10BASET MEZZANINE
lot of 3 Lavian Inc.RD323 BPC1828A Video Card 46070
MAGMA 4 PCI DMA 4 PORTS Serial adapter 01-03450-00
Natural MicroSystems NMS ISA P/N 5281 REV 2
Natural MicroSystems NMS P/N 5376 QUAD PCI CARD REV 7
MERCURY RACE MCH9 BLADE
INTEL PHD A505-0002 BARKAN SV BOARD
EQUINOX SST-64/128P PCI CARD PN:910256-1
DIVERSIFIED TECHNOLOGY 651400975 ISA CARD
CRR 804 CRR804/5 REV B ISA CARD
MOTOR I/O BOARD TKB2133 CPC-G221D01A-11
NIKON 4S015-046 NK386SX BLADE A-001
MATROX MGA-MIL/4/DELL 00053248 PCI BOARD
IFB ADD ON BOARD TKB2151 AP9E-0209A-11 W/STP IF BOARD
NOKIA TBUF C71700 BLADE 75-71700-02
NOKIA AXUA T32107.01…FO BLADE T32107 NEW














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