CC-PAIN01

描述

我国自行开发的DCS系统，如上海自仪公司的SUPMAX-800，选用法国CJ International公司的符合IEC 61131-3的IsaGraf和美国的强实时操作系统Vxworks。北京的和理时已采用Inforteam的OpebPCS开发新的DCS。

分析全世界控制设备的发展情况

从全世界范围看，软PLC/PC控制作为新兴产业正在发展。面对这种挑战，PLC仍在发展。

据美国Venture Development Corp.报告，2000年全世界共销售DCS系统，PLC系统和PC控制系统达220亿美元。其中DCS 40.5%；PLC 46.3%；PC控制13.2%。这三种控制系统所用的分散型/远程I/O的市场销售额也为220亿美元。年增长率为6.6%。到2005年估计达300亿美元。从应用领域看，DCS仍然牢牢把握大规模连续流程工业（I/O达数千点）过程控制的应用。PLC已经拥入批量控制市场，在其传统的离散制造工业仍然占据主导地位。软PLC/PC控制采用工控PC机（或嵌入式PC机）和强实时OS，可实现PLC功能和运动控制。直至，PC控制在可靠性、安全性等方面还未取得广泛认可。

据美国Venture Development Corp.报告，PLC与软PLC/PC控制相比具有以下优点：

维修和服务系统健全，有经验的维护人员队伍庞大。

电源故障不会产生大的影响。

Tektronix TDS754D 4 Ch 500 MHz, 2GSa/s Oscilloscope
option 13, 1F, 1M, 2C, + 2F

Tektronix TCP404XL/TCPA40​0 Current Probe and Amplifier

TEKTRONIX 1502C CABLE TESTER NEW

TEKTRONIX TDS784C DIGITAL OSCILLOSCOPE + 13 1F 1M 2F 2C

TEKTRONIX TDS784C DIGITAL OSCILLOSCOPE 0513 1F 1M 2F 2C

K77294 Tektronix VX1401 Mainframe w/ 4 VX4367 Module

C51192 Tektronix DTG 5274 Data Timing Generator 2.7Gb/s

C51191 Tektronix DTG 5274 Data Timing Generator 2.7Gb/s

Tektronix TDS784A 4 Ch.1 Ghz Oscilloscope AS-IS (READ)
Expedited shipping available

Tektronix TDS820 Oscilloscope 6 GHz 2 Ch 20GSa/s

Tektronix TDS524A 500 Mhz Digitizing Oscilloscope AS-IS
Expedited shipping available

TEKTRONIX TLA 711 LOGIC ANALYZER TLA 7E2 7M4 W/ MANUALS

Tektronix TDS524A 500 Mhz Color Digitizing Oscilloscope

Tektronix P6716 16 CH PCI Express Mid-Bus Probe TLA7000
Expedited shipping available

TEKTRONIX SJ300E SONET/SDH JITTER & WANDER ANALYZER Opt

TEKTRONIX TDS 694C 3GHZ OSCILLOSCOPE

TEKTRONIX Curve Tracer 571 + Op. Manual + USB Interface

Tektronix VM700A w/ opt’s 01 / 30 / 40 / 48

Tektronix TLA 704 Logic Analyzer 7E2 7N4 TLA704 Options

Tektronix P7313 12.5 GHz, Z-Active Differential Probe

Tektronix P7313 12.5 GHz Differential Probe

Tektronix AWG2041 Arbitrary Waveform Generator w/ opt’s

TEKTRONIX TLA 624 LOGIC ANALYZER WITH OPTIONS

Tektronix TDS 540A TDS540A scope, NIST-calibrated
additional free NIST recalibration within one year

SONY TEKTRONIX 3066 REALTIME SPECTRUM ANALYZER **SALE**

TEKTRONIX TDS3052 500MHz 5GS/s Digital OSCILLOSCOPE DPO

TEKTRONIX 2712 SPECTRUM ANALYZER 9KHz TO 1.8GHz 50 OHM

Tektronix 80E03 20 GHz Bandwidth Sampling Module
90 Day Warranty + 10 day Right of Return

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TEKTRONIX ST112 Sonet Transmission Test Set w opts

TEKTRONIX VX4750 VXI Function Generator / 25 MHz OPT 01

Tektronix AVG7 Analog Video Generator Module for TG700

Tektronix TDS654C/13/1F/2​F Oscilloscope 500 MHz, 4 Ch.
NIST calibration/30​-day warranty/14-da​y ROR, COLOR

Tektronix TLA704 Logic Analyzer Mainframe

Tektronix P7360A 6.0GHz Differential Probe Tested

TEKTRONIX TV 1350

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Inet Tektronix Spectra Turbo 7 SS7 Analyzer w/ 8 DLP+Po
One-day shipping available

Tektronix VX4780 16-Channel Signal Condition VXI Plug I

Tektronix TDS 460A 400 MHz 4 Channel Digital Real-Time

Tektronix TDS684C Digital Oscilloscope with Options

TEKTRONIX P7360A 6.0 GHz Bandwidth Differential Probe

TEKTRONIX TDS784D TDS 784D DIGITAL OSCILLOSCOPE 1G 4ch

Tektronix THS730A Handheld Oscilloscope***​*

Tektronix VM700A opt;s 01 / 30 / 40 (Reduced!)

TEKTRONIX 1780R VIDEO WAVEFORM MEASUREMENT SET

TEKTRONIX TLA720 LOGIC ANALYZER (4) TLA7N4 (1) TLA7E2

Tektronix AWG2020 Arbitrary Waveform Gen With Opt. 03

Tektronix 80A06 Pattern Sync Trigger Module CSA8000
Unit Tested & Guaranteed Functional w/ ROR!

Tektronix TDS 540D Digitizing Phosphor Oscilloscope 4Ch

TEKTRONIX TEK AWG2020 WITH OPTIONS /02/09 CALIBRATED

TEKTRONIX TDS3012B DIGITAL OSCILLOSCOPE TDS3TRG TDS3GV

Tektronix WFM90D Handheld Waveform Monitor

Tektronix TekRanger2 TFS3031 Mini OTDR Reflectometer

TEKTRONIX TLA7D2 2.5 GS/S OSCILLOSCOPE TLA704 TLA711

TEKTRONIX TLA7D2 2.5 GS/S OSCILLOSCOPE TLA704 TLA711

Tektronix 1780R NTSC Video Waveform Measurement Unit
Expedited shipping available

Tektronix TDS3032 2Ch. Digital Phosphor Oscilloscope

TEKTRONIX TDS784A – 4 CHANNEL DIGITIZING OSCILLOSCOPE
One-day shipping available

Tektronix TDS754D 4 Ch 500 MHz, 2GSa/s Oscilloscope
option 13, 1F, 1M, 2F