描述

1C31219G01

自標準頒布之后，并沒有產(chǎn)生很大的影響。原因在于：中國不存在真正像樣的PLC制造業(yè)； 在中國國內(nèi)有影響的PLC品牌并不積極推介； 包括該標準的主管部門在內(nèi)，很少有組織的推進活動。直到1998年以后，由于IEC 61131-3在國際控制業(yè)界的影響越來越大，在中國國內(nèi)有影響的PLC品牌開始提及自身品牌符合或兼容IEC 61131-3；若干新推出的DCS系統(tǒng)也公開宣稱，符合或兼容IEC 61131-3。于是，人們才關注這個標準。在有關專業(yè)雜志上有專文介紹該標準的制訂背景、重要性、標準的主要內(nèi)容。中國機電一體化技術應用協(xié)會組織翻譯了兩名德國作者Ｋarl-Heinz John和Miachael Tiegelkamp寫的專著：”IEC 61131-3：工業(yè)自動化系統(tǒng)的程序編制”?，F(xiàn)已由該協(xié)會內(nèi)部發(fā)行。最近，中國機電一體化技術應用協(xié)會（CAMETA）與以開發(fā)基于IEC 61131-3的編程系統(tǒng)稱著的德國KW公司遠東總經(jīng)理Robert Champoud先生合作，組織協(xié)調(diào)有關IEC 61131項目的研討會活動，得到Siemens、Phoenix、富士電機的大力支持。這對于促進它的推廣，有著深遠的意義。

所謂軟PLC實際就是在PC機的平臺上、在Windows操作環(huán)境下，用軟件來實現(xiàn)PLC的功能。此概念大約在1996年以后才被介紹到國內(nèi)來。由于這種技術尚不成熟，所以只有在學術界少數(shù)人對此關注。盡管Interllution和 Wonderware的HMI和SCADA軟件在我國推廣都很成功，但它們的軟邏輯、軟PLC產(chǎn)品P-31和InControl卻少有人問津。當然，這兩家公司也不曾刻意去開發(fā)這個市場。
Think&Do和Steeperchase 的VLC都是1998、1999年進入中國市場的，特別是Think&Do花了很大的努力，至今仍不盡如人意。當然有一些成功應用，如郵件分揀系統(tǒng)。我感覺，這多少與它們不采用IEC 61131-3，而是倡導用流程圖編程語言不無關系。

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