While tracking down input and outputs in an effort to solve a problem with a bookbinding machine with a ABB Procontic T200 PLC. I got a fault 41 on powering up the system. This was after powering this machine up and down at various times while swapping input modules trying to localize the problem. I couldn't find any information on the web for a fault 41 on this controller, and when I contacted the OEM they told me it was a CPU fault and the entire control system needed replacing at a cost of $13,000. Can anyone offer me any help in this matter, as in how to clear this fault, or what caused it?