Analog Outputs - WATSON INDUSTRIES DMS-EGP01 Owner's Manual

6. 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. This command does not require a double space bar at initialization to be in
effect.
There are two output format commands: "_" for decimal output and "^" for binary. See the second
part of Appendix A for more information on changing output formats. There are several interface
commands as well: ":" will toggle the output to send a frame of data upon receiving any non-
command character and "+" will toggle the output for no output data. These and other changes
can be made permanent by keying in the quote (") character. Double spacebar at initialization is
required for access to all of these commands.
The "&" command calls a menu which allows any of several parameters to be set. From this menu,
the user can change system time constants, data channels for serial output, heading source, velocity
source and baud rate. Double spacebar at initialization 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 cross-
talk 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 ±10 Volts with respect to the
common signal ground. The outputs include:
Signal
Bank
Elevation
Heading
Roll Rate (X Axis)
Pitch Rate (Y Axis)
Yaw Rate (Z Axis)
X Acceleration
Y Acceleration
Z Acceleration
Forward Acceleration
Lateral Acceleration
Vertical Acceleration
Note that the analog switches are disabled after certain serial commands are sent to the unit. This
prevents software/hardware switch conflicts.
Watson Industries, Inc.
Pin Range Output Range
±180°
14 ±10V
±90°
15 ±5V
16 ±10V
0-360°
±100°/s
23 ±10V
±100°/s
24 ±10V
±100°/s
25 ±10V
±10g
17 ±10V
±10g
18 ±10V
±10g
19 ±10V
±10g
20 ±10V
±10g
21 ±10V
±10g
22 ±10V
9
0 VDC Scale Factor
0° 18°/s/V
0° 18°/s/V
0° (North) 18°/s/V
0°/s 10°/s/V
0°/s 10°/s/V
0°/s 10°/s/V
0g 1g/V
0g 1g/V
0g 1g/V
0g 1g/V
0g 1g/V
0g 1g/V
DMS-EGP01 Rev A 02/12/2015