Though...
There ARE possibilities.
You can apply a so-called Master Reset to a BCU 2.
This is done by the following:
a. Apply PEI-type 20
This is simply done by having a 0 ohm resistor on the PEI type lines; (pins 5 and 6)
b. at the same time press the programming button;
c. at the same time, so while keeping the programming button pressed and while having PEI-type 20 applied, reset the device (disconnect from bus/connect again).
A few more hands may come in handy for this.
Watch out... the entire memory is freed (no access protection) and cleared by this.
Mr. Steven De Bruyne
System Department - KNX Association
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