Hi Thomas,
We don't have plan to release the PLC html source at this time. The PLC html code is tightly coupled with the firmware code, if user mixing up different hardware or firmware, it will not work. Firmware 3.00.07 firmware runs on the older 2.0.2 hardware board, it is the oldest firmware releases for PLC logic. Since then we have made 3.01.13 latest firmware for the 2.0.2 hardware board. 3.01.13 firmware incorporated all the changes of latest firmware, less the counter and frequency counter feature, due to its CPU is less capable. For hardware 2.2.2 rev board, the firmware starts with 3.02.xy. The latest firmware on the 2.2.2 hw rev board is 3.02.15.
If user does not have knowledge of how internal PLC firmware changed, he could not modify the html code to make it work together.
Thanks for using WebControl.