User's Manual

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Proprietary and Confidential Revised 10-11-11
Termination Message
The SXL1 automatically stops functioning, issuing a termination message upon completion of the
termination count as configured by the configuration serial command. The Termination Message is
the same format as a location message except the message type is 0xD3.
Termination Message Format
Byte Bits Description
0xD3 = Message Type 8 Bit 7:0 = 0xD3 = SXL1 Termination message type:
Latitude/Longitude 48 Byte 1 = Latitude MSByte
Byte 2 = Latitude
Byte 3 = Latitude LSByte
Byte 4 = Longitude MSByte
Byte 5 = Longitude
Byte 6 = Longitude LSByte
(see section 2.3.1 and 2.3.2 for encoding method)
Status 16 Bit 3:0 = undefined
Bit 4 = alarm (0=no alarm, 1=alarm w/ cause defined)
Bit 7:5 = message cause (valid when Bit 4 = 1)
Bit 8 = configuration change (toggles)
Bits 13:9 = message count (modulo 7 count)
Bit 14 = motion state, 0 = unit is stationary, 1 = unit in motion
Bit 15 = 0=3D GPS Fix found, 1=2D GPS Fix found
Engineering Message
The SXL1 automatically issues an Engineering Message following expiration of the Engineering
Interval as set in the serial Configuration message. This data may also be extracted over the serial
configuration port using the Query Engineering Data command.
Additionally, the Engineering Message is transmitted on first run of the device or if it encounters a
watchdog reset. Associated bits in the message indicate the origination cause for the message.
The Engineering Message contains parameters that relay the operability of the device in use.
Engineering Message Format
Variable Byte Bits Description
0xD7 = Message Type 0 8 Bit 7:0 = 0xD7 = SXL1 Engineering message type:
GPS Mean Search Time 1 8 Unsigned binary count in seconds for mean GPS search
to acquire
# GPS Fails 2 8 Unsigned binary count in seconds of failed GPS
attempts since last engineering message
#Transmissions 3-4 16 # of transmissions since device began service
HW configuration 5 3 defines hardware and battery configuration
Configuration Change 5 3 Modulo 7 count incrementing each time device is
configured
Termination Reset 5 1 Toggles each time the termination count is reset
Motion Status 5 1 0=stationary, 1=motion
Battery Status 6 (2:0) Battery status. Percent battery life remaining in 12.5%
increments.
Magnet Status 6 3 0=magnet absent, 1=magnet present