WATSON INDUSTRIES AHRS-S305 Owner's Manual page 9

Note: Many commands require command or "Double spacebar mode" in order to access them.
Fore more information on how to activate Command Mode, see the instructions in Appendix B.
These commands are available to the user (others are used at the factory for alignment and
calibration):
1. An "R" or "r" will set the outputs (analog and serial) to their Reference Command
modes. This mode is used in installation to physically align the unit. Double spacebar at
initialization is required for access to this command.
2. An "I" or "i" will clear the Reference Command mode if it had been set by the serial
input. Double spacebar at initialization is required for access to this command.
3. An "F" will disconnect the references from the attitude system and is the Coast Mode
Command. This coast mode is used to make the system ignore the references during high
maneuvers and brief disturbances. This mode is not intended for use except in brief
intervals, since errors will grow geometrically. Double spacebar at initialization is
required for access to this command.
4. A "K" will clear the Coast Mode Command. Double spacebar at initialization is required
for access to this command.
5. A "V" will disconnect the velocity input from the attitude system and is the Invalid
Velocity Command. This mode is used to protect the system from accumulating errors
when the velocity reference is not functioning. Double spacebar at initialization is
required for access to this command.
6. A "C" will clear the Invalid Velocity Command. Double spacebar at initialization is
required for access to this command.
7. An "!" will reinitialize the unit. Further, the access to initialization is inhibited such that
a spacebar command must be sent within 2.5 seconds of the "!" command for
initialization to be engaged.
8. An "L" in the decimal mode will return a line of characters that will identify the data
columns. Double spacebar at initialization is required for access to this command.
9. An "_" command will change the output format to decimal ASCII. This change is made
non-volatile in the unit on EEPROM by keying in the quote (") character. Double
spacebar at initialization. Command mode is required for access to this command.
10. A "^" command will change the output format to binary. This change is made non-
volatile in the unit on EEPROM by keying in the quote (") character. Double spacebar at
initialization. Command mode is required for access to this command.
11. A ":" command will toggle the output to send a frame of data upon receiving any non-
command character (On to Off; Off to On). This change is made non-volatile in the unit
on EEPROM by keying in the quote (") character. Double spacebar at initialization
Command mode is required for access to this command.
Watson Industries, Inc AHRS-S305 Rev J 03/22/2018
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