PCCC is Programmable Controller Communication Commands ,it much more complicated as Modbus / TCP.
However, you can still easily hammer protocol driver in a day or two (I did several years ago with Python).
PCCC is actually a modified version of the DF-1. Download Allen Bradley DF-1 manual before fumbling response to CCPD (Ethernet) is simply the standard version of standard protocol with a modified protocol header (some things are rearranged) and a “hello” package before starting communication.
Here are some “documentation on the Allen Bradley protocols (Ethernet or other):
http://iatips.com/rockwell.html (more…)
