Communication failure after "Write Selective"

[richylloyd]

Hi, Hope someone can assist with a simple fix...
I wrote some updated responses to the system tonight and I am no longer able to connect due to a UCM communication failure.For the write selective, I deselected a number of the pre-selected options as it was a very minor response change which should not have influenced any of the other options.
I now cannot connect from Comfigurator via Eth02 - although I can successfully ping the UCM.Keypads are just showing their respective ID\'s with the green light flashing.
I have hard reset the system a few times but with no improvement.
Many thanks in advance...

[slychiu]

Please check the ucm leds D9 Red and D10 green. are they blinking or off?

[richylloyd]

D9 and D10 are both off.  Only D1 is on (solid) on all UCMs.

[richylloyd]

Also, no cables are disconnected as the unit was working fine prior to the write.I have double checked these with no change in status.

[slychiu]

There is no bus communications at all
Disconnect all the wires from KA and KB and connect each one back one by one starting with a Keypad 1, then UCM 1 and Keypad 2
The UCM D9 and D10 should both be blinking

[richylloyd]

I have now tried all the possible combinations of Keypad and UCM connections with no change to the status.
Soon after I apply 12V to the keypad, it begins to beep indefinitely.The UCM does not connect as expected and a second UCM (GSM) also does not connect if I set it up as ID1.
I have even gone so far as to disconnect the LEM03 and any other inputs to see if that might help.
Any other ideas I can try?

[richylloyd]

All sorted now.It was a fairly fundamental communication error solved only by reinstating the factory code to allow reconnection to the UCM\'s. 

Many thanks to Hugh (Swiss Toni) for the advice, I wouldn\'t have managed without the ideas offered.

[slychiu]

What was the cause of the problem? For future reference