Saia-Burgess offers a Programmable Control Device with TCP/IP [0] stack which makes it possible to use it as a webserver [1][2].

There are some forums around [3][4]. Uhlemann has an Excel based control for PCD2 [5].
[0] http://www.saia-burgess.com.cn/leaflets/TI%20Web-Server%20e.pdf
[1] http://www.saia-burgess.com/e/products/pcd/
[2] http://www.sbc-support.ch/manuals/26_737_D8_PCD2.pdf (german, 9.9MB)
[3] http://www.pcd-forum.de
[4] http://www.sbc-support.ch
[5] http://www.uhlemann.de/pages/scxl.htm