DUAL IFD OPERATIONS
Some installations may involve two IFDs (e.g. IFD540-IFD540, IFD540-IFD440, IFD440-IFD440) that can work in a more integrated fashion. Method of Data Share (Dual IFD Operations) Dual IFDs will be connected via the Byteflight digital Databus. While any of the com ports can be configured for the dual IFD “CrossSync” communication, it is generally recommended that Com 3 be used to stay consistent with the vast majority of fielded GNS530/430 systems that the IFD will be replacing.
In those cases, Com 3 is already wired for box-to-box communication and that connection is used for dual IFD connections with no further work. When Keyboard Convenience mode is enabled via the “User Options” LSK of the SETUP tab on the AUX page, the second IFD will automatically present a virtual keyboard when the other IFD is in a mode where data is being entered or edited. In other words, if Keyboard Convenience mode is turned on, a virtual keyboard will be displayed on the “other” IFD at all the same times as if the aircraft were configured for a single IFD and a keyboard is displayed on that unit.
The following list of data will be shared between two IFDs if properly configured for data sharing:
-Enables the integration of the Caution Alerting System (CAS) to allow a single acknowledgement of any of the Global messages to be removed from both units by acknowledging them on either unit
- Enables flight plan synchronization, including modification of the flight plan to be reflected on both IFDs (this does allow for flight plan/procedure preview on the second IFD). This requires identical nav databases to be loaded on each IFD.
-Enables stored routes to be synchronized across both IFDs (this does allow for route preview on the second IFD)
-Enables fuel planning (e.g. initial fuel entry) to be synchronized across both IFDs Enables user waypoints to be synchronized across both IFDs Enables sensor settings and data (traffic, datalink, lightning, air data, etc) to be shared across both IFDs.
Full Data Sharing Requires Consistent WAAS For complete data sharing between dual IFDs, both units will need to have the same WAAS antenna configuration – either both are WAAS or both are non-WAAS. If one IFD is set up with a WAAS antenna and one is set up with a non-WAAS antenna, then the FMS-related data (flight plans, waypoints, routes) will not be shared between IFDs. Dissimilar weather data sources (e.g. GDL-69 data on one IFD and SkyTrax100 data on the other IFD) will not be shared between IFDs. Each IFD will display its own weather data in this case Likewise, dissimilar traffic data sources (e.g. TAS600 data on one IFD and SkyTrax100 data on the other IFD) will not be shared between IFDs. Each IFD will display its own traffic data in this case. For complete data sharing between dual IFDs, both units will need to have the same main software version. If the IFDs have different software versions, then the sensor and control data (e.g. weather, traffic, fuel, volumes, keyboard convenience mode, etc) will not be shared between the IFDs.
CrossSync must be turned on in both IFDs (this is a maintenance mode setting)
Both IFDs must have the same SBAS antenna configuration.
Both IFDs must have the same nav database cycle.
Both IFDs must have the same software version.