Two or more devices on a communication bus cannot have the same address. For example, two controllers on the Zone Communication bus cannot both have an address of 18. If two devices on the same bus have the same address, performance can degrade or serious communication problems may occur. These problems include the devices not coming online and all communication stopping completely.
Check for duplicate addresses in the following ways:
- If a specific device is not communicating, remove the device with communication problems and check if device address remains online at the Smart Building Hub. This determines if the device address remains online.
- If the bus communication problems are severe and no communication is present, or you cannot determine where communication is unreliable, partition (disconnect and isolate a portion of the bus for testing purposes) and test the bus portion connected to the Zone Coordinator.