KNX/TP: Trasmitter Error (send 0 receive 1)

[cekca]

Sometime i found this error in the  error log, what is the meaning of this error...???

[admin]

This means that transmitter was not able to send data to KNX. Nothing to worry about if this is not frequent, KNX does several transmission retries, so no data will be lost.

[Thomas]

Hi
I see it too. Not so often but from time to time it happen. Do you have any explanation of this behavior?
What do you exactly mean "This means that transmitter was not able to send data to KNX"? Was the bus busy for a long time? Or was it a bus power supply failure? Was the packet NACKed?

[admin]

Logic 0 is sent by pulling the bus voltage low, in case of an error the transmitter was not able to do this. It's hard to tell what caused it, most probably a collision.

[Thomas]

Collision can be a good reason. Thank you.