Set>Actv Interface; Figure 3-10. Grs/Gdc Configuration Settings Storage - Garmin G1000 Maintenance Manual

The GRS 77 and GDC 74A configuration modules function differently than the rest of the system. The
GDC 74A's configuration file is loaded directly to GDC internal memory. A copy of the file is stored in
the GDC configuration module.
The GRS 77 configuration module does not store any configuration settings. Rather, it stores calibration
data recorded during installation calibration procedures.
GRS 77
(Located in GRS backshell connector)
Stores a copy of AHRS/Magnetometer
calibration values that are recorded upon
completion of post installation calibration
procedures.
GRS 77
AHRS
The GRS 77 stores calibration data internally.
The GRS 77 also stores factory calibration data
internally. Should internal memory or the configuration
module fail, AHRS output data flags invalid.
GRS Internal Memory
Contains internal sensor calibration data
that is not installation specific. Data is
stored from factory calibrations.

Figure 3-10. GRS/GDC Configuration Settings Storage

3.4.4 SET>ACTV Interface
Throughout various Configuration Mode pages, there are SET and ACTIVE columns for input/output
settings and other parameters.
SET: Refers to a setting or group of settings that reside in PFD Internal Memory and/or the
Master Configuration Module.
ACTIVE: Refers to an 'active' setting or parameter currently being used by the LRU. LRUs store
the 'active' settings within internal memory.
Data can be manually copied from one column to the other by using the following two softkeys, when
available:
•
SET>ACTV (read 'Set to Active') softkey: Allows the installer to send the information in the
SET column (data stored in the master configuration module) to the ACTV column (data used by
LRU).
•
ACTV>SET (read 'Active to Set') softkey: Causes the LRUs current settings to be copied to the
master configuration module as SET items.
THE ACTV>SET SOFTKEY MUST BE USED WITH CAUTION! IF AN
IMPROPERLY CONFIGURED UNIT IS INSTALLED, THIS SOFTKEY CAUSES
THE WRONG CONFIGURATION TO REPLACE THE CORRECT AIRCRAFT
CONFIGURATION!
G1000-Columbia 350/400 System Maintenance Manual
190-00577-03
GDC 74A Config Module
(Located in GDC backshell connector)
Stores a copy of the GDC 74A
configuration file.
The GDC 74A stores the GDC configuration file
internally.
The GDC 74A also stores factory calibration data
internally. Should internal memory or the configuration
module fail, loss of some or all data outputs will result.
Contains internal sensor calibration data
that is not installation specific. Data is
stored from factory calibrations.
WARNING
GDC 74A
Air Data Computer
GDC Internal Memory
Revision C
Page 3-9