PLCopen
PLCopen is a worldwide association that maintains vendor and product independence, as well as independence from IEC. Founded in June 1992, the group has adopted the IEC 1131 standard; its members are committed to supply or use IEC 1131-compatible systems and, in general, promote the 1131-3 standard. The association develops common implementation concepts, appoints laboratories for compliance testing, and defines test criteria.
For additional information about PLCopen, contact:
PLCopen
PO Box 2015
NL 5300 CA Zaltbommel, The Netherlands
Tel: +31-418-541139
web: http://www.plcopen.org