During a download, ETS returns the error "Address conflict". What is the most likely cause?
A — The target device's individual address is already in use by another device on the bus
An "Address conflict" during a download means that two devices respond to the same individual address. This typically happens when a device already installed has the same address as the new one being programmed, or when a device has been duplicated in the project. Choice B (no power supply) would yield a timeout error, not a conflict. Choice C is incorrect because filter tables apply to Group Addresses, not to point-to-point downloads. Choice D is intrinsically wrong because the KNX TP bus cable is non-polarised, so polarity cannot be "reversed".
When you hit an address conflict, isolate devices one by one (cut their power or physically remove them) or use the programming button to re-assign a new address — there is no shortcut.
- A.The target device's individual address is already in use by another device on the bus✓
- B.The target device has no power supply
- C.The line coupler's filter table is blocking the download
- D.The bus cable polarity is reversed
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