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13.
An "&" command brings up a menu which allows any of several parameters to be set.
These are system time constants, selection of data channels for serial output, and baud rates.
This change is made non-volatile in the unit on EEPROM by keying in the quote (")
character. Command mode is required for access to this command.
The commands "~", "@", "#", "$", '(", ")", "{", "}", "|", "<", ">" and "?" are used by the Watson
factory to calibrate the unit and should be used only with the assistance of the factory. If an
undesired function is called, a "Q", and sometimes Escape or a Delete will interrupt the command
and return to operation with the least disturbance to the system. All other unspecified characters
such as carriage return, line feed and space are ignored by the system.
If there are problems with the system "hanging up" during the binary output mode, check for
crosstalk between the serial transmit and receive line in your installation. In addition, check to see
that the communications program used is not sending an echo. This will not happen in the decimal
or hexadecimal modes because command characters recognized by the system are not produced in
those modes.
Analog Outputs
Analog signals are output from a 14 bit digital to analog converter through an operational amplifier.
Each analog output has a 300 ohm resistor in series to eliminate oscillations from high capacitance
loads. The output range for all of the analog output channels is ±5 Volts with respect to the
common signal ground. The analog outputs can be found on the 12-pin connector. The outputs
include:
Signal
Bank (X Angle)
Elevation (Y angle)
Roll Rate (X Axis)
Pitch Rate (Y Axis)
* The Analog output range for Bank & Elevation is menu selectable. This also changes the analog scale
factor for Bank & Elevation.
The output range for both Bank and Elevation are menu selectable.
Available Ranges
±30°
±45°
±60°
±90°
±180°*
*Maximum Elevation range is ±90°
See Appendix B for more information on selecting Bank and Elevation ranges.
Built in Test Digital Output
Built-In Test is an active low digital output that continuously monitors the internal sensors for
faults. This signal is available on pin 5 of the connector. This output is High (3.3VDC) when the
unit is operating normally. This output is Low (ground) when a fault is indicated. The BIT Test
Flag of the Flag channel gives a similar indication. Flag reset is normal operation; Flag Set is a
fault condition. The BIT status byte that is available as part of the output message will give more
information on the fault conditions.
Watson Industries, Inc.
Pin
Range
Output Range
±30°*
9
±5V
±30°*
3
±5V
±100°/s
10
±5V
±100°/s
2
±5V
Output Range
0 VDC
±5V
0°
±5V
0°
±5V
0°
±5V
0°
±5V
0°
9
0 VDC
Scale Factor
0°
6.0°/V *
0°
6.0°/V *
0°/s
20°/s/V
0°/s
20°/s/V
Scale Factor
6.0°/V
9.0°/V
12°/V
18°/V
36°/V
ADS-C232-3AD Rev A 10/25/2017
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