描述
1C31219G01
自标准颁布之后，并没有产生很大的影响。原因在于：中国不存在真正像样的PLC制造业； 在中国国内有影响的PLC品牌并不积极推介； 包括该标准的主管部门在内，很少有组织的推进活动。直到1998年以后，由于IEC 61131-3在国际控制业界的影响越来越大，在中国国内有影响的PLC品牌开始提及自身品牌符合或兼容IEC 61131-3；若干新推出的DCS系统也公开宣称，符合或兼容IEC 61131-3。于是，人们才关注这个标准。在有关专业杂志上有专文介绍该标准的制订背景、重要性、标准的主要内容。中国机电一体化技术应用协会组织翻译了两名德国作者Ｋarl-Heinz John和Miachael Tiegelkamp写的专著：”IEC 61131-3：工业自动化系统的程序编制”。现已由该协会内部发行。最近，中国机电一体化技术应用协会（CAMETA）与以开发基于IEC 61131-3的编程系统称著的德国KW公司远东总经理Robert Champoud先生合作，组织协调有关IEC 61131项目的研讨会活动，得到Siemens、Phoenix、富士电机的大力支持。这对于促进它的推广，有着深远的意义。
所谓软PLC实际就是在PC机的平台上、在Windows操作环境下，用软件来实现PLC的功能。此概念大约在1996年以后才被介绍到国内来。由于这种技术尚不成熟，所以只有在学术界少数人对此关注。尽管Interllution和 Wonderware的HMI和SCADA软件在我国推广都很成功，但它们的软逻辑、软PLC产品P-31和InControl却少有人问津。当然，这两家公司也不曾刻意去开发这个市场。
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。
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