Think&Do和Steeperchase的VLC都是1998、1999年进入中国市场的，特别是Think&Do花了很大的努力，至今仍不尽如人意。当然有一些成功应用，如邮件分拣系统。我感觉，这多少与它们不采用IEC 61131-3，而是倡导用流程图编程语言不无关系。
德国KW公司在1998年以后就在北京设立办事处，着力推广其符合IEC 61131-3的编程系统MULTIPROG和控制程序ProConOS。
Siemens从2001年开始在国内推介其软PLC系列产品WinAC，已经有了一些应用。他们是很有战略眼光的。德国Inforteam公司的openPCS在国内也开始了市场开拓活动，2002年6月曾在上海的自动化展览会上举办过技术交流。
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。
对低端应用，PLC具有极大的性能价格比优势。
可靠性无可比拟，故障停机少。
加固型结构，适合工业环境应用。
140DDO35310 140DDO35310 140DDO35310 140CRA21120 140CRA21120 CRA21120 CRA21120
140DDO35310C 140DDO35310C 140DDO35310C 140CRA21120C 140CRA21120C CRA21120C CRA21120C
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140DDO88500 140DDO88500 140DDO88500 140CRA21220C 140CRA21220C CRA21220C CRA21220C
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140DIO33000C 140DIO33000C 140DIO33000C 140CRA93101 140CRA93101 CRA93101 CRA93101
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140DRA84000C 140DRA84000C 140DRA84000C 140CRA93200 140CRA93200 CRA93200 CRA93200
140DRC83000 140DRC83000 140DRC83000 140CRA93200C 140CRA93200C CRA93200C CRA93200C
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140DDM39000C 140DDM39000C 140DDM39000C 140D045G03 140D045G03 D045G03 D045G03
140DDM69000 140DDM69000 140DDM69000 140D045G05 140D045G05 D045G05 D045G05
140DDM69000C 140DDM69000C 140DDM69000C 140D091G05 140D091G05 D091G05 D091G05
140ACI03000 140ACI03000 140ACI03000 140D150H01 140D150H01 D150H01 D150H01
140ACI03000C 140ACI03000C 140ACI03000C 140D152G01 140D152G01 D152G01 D152G01
140ACI04000 140ACI04000 140ACI04000 140D152G03 140D152G03 D152G03 D152G03
140ACI04000C 140ACI04000C 140ACI04000C 140D152G05 140D152G05 D152G05 D152G05
140AII33000 140AII33000 140AII33000 140D152G07 140D152G07 D152G07 D152G07
140AII33000C 140AII33000C 140AII33000C 140D161G01 140D161G01 D161G01 D161G01
140AII33010 140AII33010 140AII33010 140D164G01 140D164G01 D164G01 D164G01
140AII33010C 140AII33010C 140AII33010C 140D316G01 140D316G01 D316G01 D316G01
140ARI03010 140ARI03010 140ARI03010 140D316G02 140D316G02 D316G02 D316G02
140ARI03010C 140ARI03010C 140ARI03010C 140D316G03 140D316G03 D316G03 D316G03
140ATI03000 140ATI03000 140ATI03000 140D316G04 140D316G04 D316G04 D316G04
140ATI03000C 140ATI03000C 140ATI03000C 140D316G05 140D316G05 D316G05 D316G05
140AVI03000 140AVI03000 140AVI03000 140D316G06 140D316G06 D316G06 D316G06
140AVI03000C 140AVI03000C 140AVI03000C 140D316G07 140D316G07 D316G07 D316G07
140ACO02000 140ACO02000 140ACO02000 140D316G10 140D316G10 D316G10 D316G10
140ACO02000C 140ACO02000C 140ACO02000C 140D316G11 140D316G11 D316G11 D316G11
140ACO13000 140ACO13000 140ACO13000 140D316G12 140D316G12 D316G12 D316G12
140ACO13000C 140ACO13000C 140ACO13000C 140D777G01 140D777G01 D777G01 D777G01
140AIO33000 140AIO33000 140AIO33000 140D778G01 140D778G01 D778G01 D778G01
140AIO33000C 140AIO33000C 140AIO33000C 140D779G01 140D779G01 D779G01 D779G01
140AVO02000 140AVO02000 140AVO02000 140D930G05 140D930G05 D930G05 D930G05
140AVO02000C 140AVO02000C 140AVO02000C 140D930H01 140D930H01 D930H01 D930H01
140AMM09000 140AMM09000 140AMM09000 140D930H02 140D930H02 D930H02 D930H02
140AMM09000C 140AMM09000C 140AMM09000C 140D930H03 140D930H03 D930H03 D930H03
140EHC20200 140EHC20200 140EHC20200 140D930H04 140D930H04 D930H04 D930H04
140EHC10500 140EHC10500 140EHC10500 140DAI34000 140DAI34000 DAI34000 DAI34000
140EHC10500C 140EHC10500C 140EHC10500C 140DAI34000C 140DAI34000C DAI34000C DAI34000C
140EHC20200C 140EHC20200C 140EHC20200C 140DAI35300 140DAI35300 DAI35300 DAI35300
140HLI34000 140HLI34000 140HLI34000 140DAI35300C 140DAI35300C DAI35300C DAI35300C
140HLI34000C 140HLI34000C 140HLI34000C 140DAI44000 140DAI44000 DAI44000 DAI44000
140ERT85410 140ERT85410 140ERT85410 140DAI44000C 140DAI44000C DAI44000C DAI44000C
416NHM21234 416NHM21234 416NHM21234 140DAI45300 140DAI45300 DAI45300 DAI45300
416NHM30030A 416NHM30030A 416NHM30030A 140DAI45300C 140DAI45300C DAI45300C DAI45300C
416NHM30032A 416NHM30032A 416NHM30032A 140DAI54000 140DAI54000 DAI54000 DAI54000
140XBP00200 140XBP00200 140XBP00200 140DAI54000C 140DAI54000C DAI54000C DAI54000C
140XBP00200C 140XBP00200C 140XBP00200C 140DAI54300 140DAI54300 DAI54300 DAI54300
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140XCA71706 140XCA71706 140XCA71706 140DAO84210 140DAO84210 DAO84210 DAO84210
140XCA71709 140XCA71709 140XCA71709 140DAO84210C 140DAO84210C DAO84210C DAO84210C
140CRP93100 140CRP93100 140CRP93100 140DAO84220 140DAO84220 DAO84220 DAO84220
140CRP93200 140CRP93200 140CRP93200 140DAO84220C 140DAO84220C DAO84220C DAO84220C
