If there are already TAC Xenta 104-A devices commissioned in an LNS database, then it may not be possible to add TAC Xenta 104-A controllers of different system versions into the same database. Nor is it possible to do a replace. Certain firmware versions of the 104-A controller are not compatible with one another. Trying to add a different system version to an existing database will produce an interface does not match error. For more information on this error, see The new program interface does not match the previously defined program interface. (Subsystem: NS, #....
The incompatibility between different system versions of the TAC Xenta 104-A controller is due to a change that was made in the size of the SNVT declaration area residing in the device memory. The change in device memory occurred between version 1.10 and 1.20. For the same Program ID, LNS requires this size to be the same as previously commissioned devices.
- The first action that should be taken is to update the LNS network to the most recent version. It has been confirmed that newer LNS versions have addressed this issue so that no further action is required. With newer LNS software, different version types of the TAC Xenta 104-A may be added to the same database.
- If upgrading the LNS software is not an option, the firmware in the controllers can be upgraded as a work around to correct the issue. In order for a TAC Xenta 104-A controller with version 1.10 to reside in the same database as version 1.20, the 1.20 controller must be upgraded to version 1.20A. In similar fashion, version 1.21 must be upgraded to version 1.21A to coincide with version 1.10. To add a 104-A controller with version 1.21 to a database with version 1.20 already on it, no further action need be taken. Version 1.20 and 1.21 are compatible.
It is important to reference the compatibility matrix found below. Changing the firmware to an "A" version will then make the controller incompatible with versions 1.20 and 1.21. Also note that it is not possible to upgrade from system version 1.10 to 1.20/1.21 due to the memory configuration.The modified "A" versions will not be loaded into the controllers from the factory. These NXE/APB files will only be available on the Buildings Business Extranet. To download the NXE/APB file for v1.20A or v1.21A, go to The Exchange Download Center. Perform a search for TAC Xenta 104-A Firmware. The 1.20A version will be labeled "TAC Xenta 104-A Version 1.20 (78 Kb)" and the 1.21A version will be labeled "TAC Xenta 104-A Version 1.21A (45 Kb)".