Moog Crossbow VG700MB Series - Manual (Page 15)

VG700M User’s Manual
Doc.# 7430-0280-01 Rev. F Page 9
the erection rate should always be greater than the drift rate of the rate
gyros. The erection rate is discussed in section 4.2 in more detail.
The VG700M outputs the pitch, roll and relative heading in the digital data
packet in angle mode. To convert the digital data to angle, use the
following relation:
angle = data*(SCALE)/(2
15
-1) ,
where angle is the actual angle in degrees (either pitch or roll), and data is
the signed integer data output in the data packet, and SCALE is a constant.
SCALE = 180
0
for roll, pitch and relative heading.
3.5 Commands
The DMUs have a simple command structure. You send a command
consisting of one or two bytes to the DMU over the serial interface and the
DMU will execute the command.
; NOTE
The DMU commands are case sensitive!
GyroView formulates the proper command structures and sends them over
the serial interface. You can use GyroView to verify that the DMU is
functioning correctly. GyroView does not use any commands that are not
listed here.
3.5.1 Command List
Command Ping
Character(s) Sent R
Response H
Description Pings DMU to verify communications
Command Voltage Mode
Character(s) Sent r
Response R
Description Changes measurement type to Voltage Mode.
DMU outputs raw sensor voltage in the data
packet.
Command Scaled Mode