描述
輸入設(shè)備選用的是按鈕SB0的常閉觸點(diǎn),輸入繼電器X0的線圈狀態(tài)取決于SB0的狀態(tài)。該按鈕未按下時(shí),輸入繼電器X0線圈狀態(tài)為”1″通電狀態(tài),程序中所有X0觸點(diǎn)均動(dòng)作,即常開觸點(diǎn)接通,常閉觸點(diǎn)斷開;若按下該按鈕,則輸入繼電器X0線圈狀態(tài)為”0″斷電狀態(tài),程序中所有X0觸點(diǎn)均恢復(fù)常態(tài)。如果輸入繼電器連接的輸入設(shè)備是按鈕SB0的常開觸點(diǎn),則情況恰好相反:在該按鈕未按下時(shí),輸入繼電器X0線圈狀態(tài)為”0″斷電狀態(tài),程序中所有X0觸點(diǎn)均不動(dòng)作;若按下該按鈕,輸入繼電器X0線圈狀態(tài)為”1″通電狀態(tài),程序中所有X0觸點(diǎn)均動(dòng)作。
2.停車按鈕使用常閉型
由于PLC在運(yùn)行程序判別觸點(diǎn)通斷狀態(tài)時(shí),只取決于其內(nèi)存中輸入繼電器線圈的狀態(tài),并不直接識(shí)別外部設(shè)備,因此編程時(shí),外部設(shè)備的選用與程序中的觸點(diǎn)類型密切相關(guān)。這是一個(gè)在對(duì)照電氣控制原理圖進(jìn)行PLC編程時(shí)易出現(xiàn)的問題。最典型的例子是基本控制–“起保??刂?#8221;中的停車控制。
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。
Racal Instruments 5014 DUAL CHANNEL THERMAL CONTROLLER
National Instruments NI PXI-1031 4 slot PXI chassis
RED LION CONTROLS Model:LGPB QTY:2
National Instruments NI PXI-6527 Digital I/O PXI 6527
National Instruments NI PXI-6713 Analog Output PXI 6713
Siemens S7-200 6ES7 216-2AD21-0XB0 CPU266+PC/PPI Cable
DALSA CORECO iMAGING Frame Grabbers Bandit II Bandit 2
HP 744/132L A4500 VME Boards With 256MB STACKABLE RAM
Koyo Direct PLC Direct Logic PLC CPU DL240 D2-240
HP 82341D HPIB PNP Adapter ISA HP P/N 82341-26503
HP E1489-66511 E1489 66511 PCA MXI CONTROLLER
TEKNIC SST-1500-131 OPT:ACX SERVO STEPPER DRIVE 2 unit
Mitsubishi MELSEC FXos-14MT-DSS
NATIONAL INSTRUMENTS NI PMC-GPIB PMC GPIB IEEE 488.2
TEKNIC SST-1500-130 with option ACX SERVO DRIVE QTY=2
COMTROL 95850-5 95891-8 QUAD/OCTA ROCKPORT PCI QTY=2
Intel EXPI9402PT PRO/1000 PT Dual Port
NuDAQ 6208 Series Multi-channel Analog Output Board
NuDAQ PCI-7250 8 Channel Digital I/O Relay PCI Card
NuDAQ PCI-7251 8 Channel Digital I/O Relay PCI Card
NuDAQ PCI-7296 Opto-22 Compatible 96-CH Digital I/O
NuDAQ PCI-9113 32 Ch Isolated Analog Input Card
Lot of 6 CPE High speed SMA Male 50 Ohm Terminator
Lot of 2 Omron G730-VID16-B Remote Terminal Module
GALIL MOTION CONTROL DMC-1040 4 AXIS MOTION CONTROLLER
New Focus 8732 Picomotor Multi Axis Driver offer
Beckhoff FC2002 FC 2002 LIGHTBUS Interface 2 channels
Agilent 85024A High Frequency Probe 300KHz-3GHz
Omron G71-IC16+G7TC-ID16+G7T 1122S RELAY x16+FOC
Teli CS8320C INDUSTRIAL CCD VISION CAMERA
Mitsubishi Melsec AD71 PLC
MATROX METEOR2-DIG/4/L DIGITAL FRAME GRABBER PCI CARD
Beckhoff FC7502 FC 7502 SERCOS Interface 2 channels PCI
Sony XC-ES50CE High Sensitivity Monochrome CCD Camera
Lightwave Electronic laser driver Model M131S
KEYENCE Colour Differentiating Fibreoptic Sensor CZ-V1
OPTO 22 SNAP-LCM4 SNAP LCM4 CONTROLLER
Agilent 54620-61601 Logic Analyzer Probe Cable
KOLLMORGEN SERVOSTAR 400M 403M-S S403M-SE SERVO DRIVE
KOLLMORGEN SERVOSTAR 400A 403A-S S403A-SE SERVO DRIVE
Lot of 2 Panasonic GP-MF102K INDUSTRIAL VISION CAMERA
Lot of 2 SONY XC-75 CCD INDUSTRIAL VISION CAMERA
JAI CV-M50 CVM50 CCD INDUSTRIAL VISION CAMERA
Mini-Circuits ZN2PD-6G-1 6GHz Power Splitter Qty=2
ADVANTECH PCA-6653 FLAT PANEL/CRT VGA CARD REV.B1
ADVANTECH PCI-1756 64-channel Isolated Digital I/O Card
Agilent 10460A 10461A TTL CLOCK DATA POD
Agilent 1152A 2.5GHz Active Probe
Agilent/HP 54006-68701 Pack of 5 450 Ohm Resistors
HP/Agilent 5086-7968 26.5 GHz Dir Coupler
Agilent 87222E Coaxial Transfer Switch DC to 50 GHz
Intel SBCECMM2 SBCE Accessory Management Module 2
SIEMENS LOGO 24RCL PLC 6ED1 053-1HBOO-OBA2
OPTO 22 SNAP-LCM4 SNAP LCM4 CONTROLLER
OPTO 22 SNAP-B3000 BRAIN WITH 5 X SNAP-IDC5
GE Fanuc IC693UDR005FP1 Micro 90 PLC Controller
LOT OF 5 FESTO LRMA-QS-4 PRESSURE REGULATOR
BECKHOFF FC5101 FC 5101 PCI CANopen
LEAG Antriebstechnik AG TFM 060 N7D SERVO DRIVER
Optem 25-70-49.5X SC50 with HITACHI KP-D20BU
Ericsson PM3757U2 Raid Controller Fiber cha&quad eth
ALLEN BRADLEY 1763-L16BBB MICROLOGIX 1100 NEW
AGILENT E1476A 75000 VXI Series C 64 Channel Mux
JFW 50P-1320 solid-state Programmable Attenuato 127dB
HITACHI ZOSEN HIMV-134 C PCB CARD,HIMV134 HIMV 134
CyberOptics Laser Lead Locator PWA 512 0125 REV D
FUJI DF 9200143-BO JZMMC-IS70B REV.B 03 PCB CARD
Agilent E6601A WIRELESS COMMUNICATIONS TEST SET PANEL
Agilent 1250-1158 Adapter SMA(f)to SMA(f)DC 18 GHz
AGILENT E1405B 75000 VXI Series C COMMAND MODULE
Agilent E6651A WIRELESS MOBILE WiMAX TEST SET PANEL
AGILENT/HP 82350B PCI GPIB INTERFACE CARD
OMRON SYSMAC CJ1G CPU43H NC233 ID261 OD232 PA202 PLC
Toshiba IK-C40MR Power Supply with CCD Camera&Lens
AB MicroLogix 1762-OW16 Relay Module NEW
BOSCH ZS 400 CPU SYSTEM BOARD
IMAGING TECHNOLOGY OFG REV D Frame Grabbers
Maxon Motor Linear Servo Controller
OMRON SYSMAC CPM1A-30CDR-A-V?1 CPM1A30CDRAV1 PLC
FORCE SPARC CPU-5V CPU-5V/64-100-2 VME MAINFRAME CARD
SYSCON INNER RACE CHECKING LINEAR TRANSDUCER
SCION LG-3 Frame Grabber REV B PCI
500 Watt 50 Ohm Dummy Load
MAGMA PCI EXPANSION SYSTEM PCIHIF68 01-03527 REV G
Agilent/HP 33321-60068 Step Attenuator,0-35dB
MuTech M-Vision MV-510 MV510 PCI Frame grabber Card
Mutech M-Vision MV1000 MV-1000 PCI Frame Grabber Card
FORCE COMPUTERS SYS68K CPU-6A
Nippon ChemiCon 450V 6800UF Capacitor
STI 70027-1000 LCC-FB-AC1-U Light Courtain Controller
COHERENT COMPASS YAG LASER DPY301 II WITH POWER SUPPLY
Melles Griot 25 LHP 151-230 laser Power Supply