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具體成交價(jià)以合同協(xié)議為準(zhǔn)- 140XCP60000140XCP600 產(chǎn)品型號(hào)
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訪問次數(shù)：469更新時(shí)間：2017-02-27 15:23:03
140XCP60000
140XCP60000
1）每次掃描用戶程序之前，都先執(zhí)行故障自診斷程序。自診斷內(nèi)容為I/O部分、存儲(chǔ)器、CPU等，發(fā)現(xiàn)異常停機(jī)顯示出錯(cuò)。若自診斷正常，繼續(xù)向下掃描。
2）PLC檢查是否有與編程器和計(jì)算機(jī)的通信請(qǐng)求，若有則進(jìn)行相應(yīng)處理，如接收由編程器送來的程序、命令和各種數(shù)據(jù)，并把要顯示的狀態(tài)、數(shù)據(jù)、出錯(cuò)信息等發(fā)送給編程器進(jìn)行顯示。如果有與計(jì)算機(jī)等的通信請(qǐng)求，也在這段時(shí)間完成數(shù)據(jù)的接受和發(fā)送任務(wù)。
3）PLC的*處理器對(duì)各個(gè)輸入端進(jìn)行掃描，將輸人端的狀態(tài)送到輸入狀態(tài)寄存器中，這就是輸入采樣階段。
4）*處理器CPU將指令逐條調(diào)出并執(zhí)行，以對(duì)輸人和原輸出狀態(tài)（這些狀態(tài)統(tǒng)稱為數(shù)據(jù)）進(jìn)行“處理”，即按程序?qū)?shù)據(jù)進(jìn)行邏輯、算術(shù)運(yùn)算，再將正確的結(jié)果送到輸出狀態(tài)寄存器中，這就是程序執(zhí)行階段。
5）當(dāng)所有的指令執(zhí)行完畢時(shí)，集中把輸出狀態(tài)寄存器的狀態(tài)通過輸出部件轉(zhuǎn)換成被控設(shè)備所能接受的電壓或電流信號(hào)，以驅(qū)動(dòng)被控設(shè)備，這就是輸出刷新階段。
PLC經(jīng)過這五個(gè)階段的工作過程，稱為一個(gè)掃描周期。完成一個(gè)周期后，又重新執(zhí)行上述過程，掃描周而復(fù)始地進(jìn)行。掃描周期是PLC的重要指標(biāo)之一，在不考慮第二個(gè)因素（與編程器等通信）時(shí)，掃描周期T為：
T＝（讀入一點(diǎn)時(shí)間×輸入點(diǎn)數(shù)）+（運(yùn)算速度×程序步數(shù)）＋（輸出一點(diǎn)時(shí)間×輸出點(diǎn)數(shù)）十故障診斷時(shí)間
顯然掃描時(shí)間主要取決于程序的長短，一般每秒鐘可掃描數(shù)十次以上，這對(duì)于工業(yè)設(shè)備通常沒有什么影響。但對(duì)控制時(shí)間要求較嚴(yán)格，響應(yīng)速度要求快的系統(tǒng)，就應(yīng)該精確的計(jì)算響應(yīng)時(shí)間，細(xì)心編排程序，合理安排指令的順序，以盡可能減少掃描周期造成的響應(yīng)延時(shí)等不良影響。
PLC與繼電接觸器控制的重要區(qū)別之一就是工作方式不同。繼電接觸器控制是按“并行”方式工作的，也就是說是按同時(shí)執(zhí)行的方式工作的，只要形成電流通路，就可能有幾個(gè)繼電器同時(shí)動(dòng)作。而PLC是以反復(fù)掃描的式工作的，它是循環(huán)地連續(xù)逐條執(zhí)行程序，任一時(shí)刻它只能執(zhí)行一條指令，這就是說PLC是以“串行”方式工作的。這種串行工作方式可以避免繼電接觸器控制的觸點(diǎn)競爭和時(shí)序失配問題。
總之，采用循環(huán)掃描的工作方式也是PLC區(qū)別于微機(jī)的zui大特點(diǎn)，使用者應(yīng)特別注意。
FN2N PLC 的規(guī)格及組成
FN2N系列PLC有FN2N16、FN2N32、FN2N48、FN2N64、FN2N80 、FN2N128等， FN2N 32，主要由以下幾個(gè)部分構(gòu)成：
1、控制單元：設(shè)有與編程器，計(jì)算機(jī)的接口，與I/O擴(kuò)展單元相連的擴(kuò)展口，輸入、輸出端子、電源輸入和輸出端子，FN2N有16個(gè)輸入點(diǎn)和16個(gè)輸出點(diǎn)。
2、擴(kuò)展單元。
3、智能單元。
4、鏈接單元。
5、編程工具：使用MELSOFT GX Developer編程軟件。
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Credence LT1101 Voltage Supply Board 671-4014-04 Spare
TE-W Thermal Infrared Camera 160*120 core protype
Putzmeister Concrete Axial Piston Pump 067370003 New
ICHINOSE S-7000 SQC-6 Positioner Control Panel NEW
Welch Allyn 88042A Colposcope Factory Refurbished Spare
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BLUECOAT 8000-1 PROXY SERVER WEB ACCELERATOR 080-03103
Honeywell Pressure Instrument Druck DPI 701 installed
New Motorola SGLF4136FA JCDMA Broadband XCVR 1X CARD
MKS Baratron 220DD Differential Capacitance Manometer
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New IRONPORT C300 Security Sever Hardware
Honeywell 51196694-300/U1 Keyboard DCS spare
Simrad GC80/85 Compact Control Unit I-type 27101690 NEW
Honeywell 51405043-175 Digital Output 24v module NEW
Agilent G1978-60027 Charging Electrode Mount Assy NEW
VersaCAT TEST SYSTEM 3M Austin Metrology LAB USED
Brocade BR-TWS3-R250W Wide Area File Services Appliance
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Agilent G1315-60015 Micro High-Pressure Flow Cell NEW
Thrane & Thrane Sailor RT5022 VHF DSC NEW
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STUDER Distribution Box A943.045500 NEW
Alca 3BA23197BA CPU6 Board 40G 128M New
Alca 3AL78830AE card for 1660 1662SMC etc New
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USSI Board N451910-5102 LM1601-9R LM3020-9 Ansaldo
New USSI Auxiliary Board PN: N12360401 Ansaldo
SIEMENS SIVOLT-A-Drehst?romsler 40A 6SG2412-3CA00-Z
Endress+Hauser Turbimax CUS31-W4E New
Nor NTN063FM S18K DDM 900 Filter 190-CY127-F1V5
Repaired Marconi LB16BG Board PLT40 UNPORT TRANS 2.5GB
SAM ELECTRONICS HS06-TCU NG3028G201 Board NEW
SAM ELECTRONICS HS10 Pulse Modulator NG3028G206 25KW
ECS CNC BASIC Controller 080H969 Spare part USED
New Alca MD128W1 3DB02136AA
Cooper Cleco 67ES135D4 Netsetter Inline Fixed Spindle
Lot of 2973pcs NEC UPD78F0102HMC-5?A4 F0102H 8-bit $1/pc
MAN B&W PMI SYSTEM Pressure Analyzer for 6S50MC-C
Shimadzu GC-14A GAS CHROMATOGRAPH USED SPL FID install
New OKUMA Drive Board UCMB2+F A911-2821 E4809-770-144-A
ABB SPAD346C3 SPAD 346 C3 DIFFERENTIAL RELAY PROTECTION
Hypertherm HT2000 041677 129160 Chopper used Spare
Credence LT1101 Voltage Supply Board 671-4014-04 Spare
TE-W Thermal Infrared Camera 160*120 core protype
Putzmeister Concrete Axial Piston Pump 067370003 New
ICHINOSE S-7000 SQC-6 Positioner Control Panel NEW
Welch Allyn 88042A Colposcope Factory Refurbished Spare
Refurbished ALSTOM STF-DL ANTENNA Ref: 23509 Rev. E
PELCO SD4CBW-PG-E1-X Spectra IV Camera
BLUECOAT 8000-1 PROXY SERVER WEB ACCELERATOR 080-03103
Honeywell Pressure Instrument Druck DPI 701 installed
New Motorola SGLF4136FA JCDMA Broadband XCVR 1X CARD
MKS Baratron 220DD Differential Capacitance Manometer
Alca ISA-ES4 L2 Ethernet Board 3AL81879AA ES4-8FE
GUTOR 0C0075 and 0C0950 New
Tektronix gigaBERT 1400 GENERATOR GB1400 Desktop Refurb
RICOH SR842 finisher stapler for MP6000 MP7000 MP8000
Alca-Lucent O-24120G-A 3FE51185AB 7342 ISAM FTTU MDU
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B&R APC620 System Unit 5PC600.SX02-01 USED SPARE
Pressure Sensor 3876134-1 for AIRBUS A320 NEW
New IRONPORT C300 Security Sever Hardware
Honeywell 51196694-300/U1 Keyboard DCS spare
Simrad GC80/85 Compact Control Unit I-type 27101690 NEW
Honeywell 51405043-175 Digital Output 24v module NEW
Agilent G1978-60027 Charging Electrode Mount Assy NEW
VersaCAT TEST SYSTEM 3M Austin Metrology LAB USED
Brocade BR-TWS3-R250W Wide Area File Services Appliance
ASE2000-COM Communication Test Set by Applied Systems
Honeywell 51304672-150 Analog Output Spare forTDC 3000
Agilent G1315-60015 Micro High-Pressure Flow Cell NEW
Thrane & Thrane Sailor RT5022 VHF DSC NEW
SEL-387 Current Differential & Overcurrent Relay 110VDC
STUDER Distribution Box A943.045500 NEW
Alca 3BA23197BA CPU6 Board 40G 128M New
Alca 3AL78830AE card for 1660 1662SMC etc New
Alca 3AL98023AA ENHANCED SERGI for 1662SMC etc New
NeoScale CryptoStor Tape 700 SC702R NEW
NEW Callenberg SYMAP ECG ENGINE CONTROL GENERATOR
USSI Board N451910-5102 LM1601-9R LM3020-9 Ansaldo
New USSI Auxiliary Board PN: N12360401 Ansaldo
SIEMENS SIVOLT-A-Drehst?romsler 40A 6SG2412-3CA00-Z
Endress+Hauser Turbimax CUS31-W4E New
Nor NTN063FM S18K DDM 900 Filter 190-CY127-F1V5
Repaired Marconi LB16BG Board PLT40 UNPORT TRANS 2.5GB
SAM ELECTRONICS HS06-TCU NG3028G201 Board NEW
SAM ELECTRONICS HS10 Pulse Modulator NG3028G206 25KW
ECS CNC BASIC Controller 080H969 Spare part USED
New Alca MD128W1 3DB02136AA
Cooper Cleco 67ES135D4 Netsetter Inline Fixed Spindle
Lot of 2973pcs NEC UPD78F0102HMC-5?A4 F0102H 8-bit $1/pc
MAN B&W PMI SYSTEM Pressure Analyzer for 6S50MC-C
Shimadzu GC-14A GAS CHROMATOGRAPH USED SPL FID install
New OKUMA Drive Board UCMB2+F A911-2821 E4809-770-144-A
ABB SPAD346C3 SPAD 346 C3 DIFFERENTIAL RELAY PROTECTION
Hypertherm HT2000 041677 129160 Chopper used Spare
Credence LT1101 Voltage Supply Board 671-4014-04 Spare
TE-W Thermal Infrared Camera 160*120 core protype
Putzmeister Concrete Axial Piston Pump 067370003 New
ICHINOSE S-7000 SQC-6 Positioner Control Panel NEW
Welch Allyn 88042A Colposcope Factory Refurbished Spare
Refurbished ALSTOM STF-DL ANTENNA Ref: 23509 Rev. E
PELCO SD4CBW-PG-E1-X Spectra IV Camera
BLUECOAT 8000-1 PROXY SERVER WEB ACCELERATOR 080-03103
Honeywell Pressure Instrument Druck DPI 701 installed
New Motorola SGLF4136FA JCDMA Broadband XCVR 1X CARD
MKS Baratron 220DD Differential Capacitance Manometer
Alca ISA-ES4 L2 Ethernet Board 3AL81879AA ES4-8FE
GUTOR 0C0075 and 0C0950 New
Tektronix gigaBERT 1400 GENERATOR GB1400 Desktop Refurb
RICOH SR842 finisher stapler for MP6000 MP7000 MP8000
Alca-Lucent O-24120G-A 3FE51185AB 7342 ISAM FTTU MDU
Rivertrace Engineering SMART ODME SVC Exchange Computer
B&R APC620 System Unit 5PC600.SX02-01 USED SPARE
Pressure Sensor 3876134-1 for AIRBUS A320 NEW
New IRONPORT C300 Security Sever Hardware
Honeywell 51196694-300/U1 Keyboard DCS spare
Simrad GC80/85 Compact Control Unit I-type 27101690 NEW
Honeywell 51405043-175 Digital Output 24v module NEW
Agilent G1978-60027 Charging Electrode Mount Assy NEW
VersaCAT TEST SYSTEM 3M Austin Metrology LAB USED
Brocade BR-TWS3-R250W Wide Area File Services Appliance
ASE2000-COM Communication Test Set by Applied Systems
Honeywell 51304672-150 Analog Output Spare forTDC 3000
Agilent G1315-60015 Micro High-Pressure Flow Cell NEW
Thrane & Thrane Sailor RT5022 VHF DSC NEW
SEL-387 Current Differential & Overcurrent Relay 110VDC
STUDER Distribution Box A943.045500 NEW
Alca 3BA23197BA CPU6 Board 40G 128M New
Alca 3AL78830AE card for 1660 1662SMC etc New
Alca 3AL98023AA ENHANCED SERGI for 1662SMC etc New
NeoScale CryptoStor Tape 700 SC702R NEW
NEW Callenberg SYMAP ECG ENGINE CONTROL GENERATOR
USSI Board N451910-5102 LM1601-9R LM3020-9 Ansaldo
New USSI Auxiliary Board PN: N12360401 Ansaldo
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廈門市海滄區(qū)濱湖一里1號(hào)樓7梯2008
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