P0913TT

描述

程序中停车信号X0使用的触点类型却不相同，其原因就是连接在输入继电器X0上的外部停车按钮触点类型选用不同。图4所示梯形图程序更加符合我们的阅读习惯，也更易分析其逻辑控制功能，因此在PLC构成控制系统中，外部开关、按钮无论用于起动还是停车，一般都选用常开型，这是一个在使用PLC时需要格外注意的问题。

二、PLC的”串行”运行方式与控制程序的编制

PLC与继电接触器控制的重要区别之一就是工作方式不同。继电接触器控制系统是按”并行”方式工作的，也就是说是按同时执行的方式工作的，只要形成电流通路，就可能有几个电器同时动作。而PLC是以”串行”方式工作的，PLC在循环执行程序时，是按照语句的书写顺序自上而下进行逻辑运算，而前面逻辑运算的结果会影响后面语句的逻辑运算结果。因此梯形图编程时，各语句的位置也会对控制功能产生关键影响

欧美品牌停产的，常用的“PLC”备品备件

我司产品应用于以下领域：

1,《发电厂DCS监控系统》

2,《智能平钢化炉系统制造》

3,《PLC可编程输送控制系统》

4,《DCS集散控制系统》
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5,《智能型消防供水控制系统》

6,《化工厂药液恒流量计算机控制系统》

7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列

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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