User's Manual

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Proprietary and Confidential Revised 10-11-11
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Message Cause 6 (7:6) 00 = Engineering interval expired
01 = First run of device
10 = Watchdog reset
11 = Low battery warning (Engineering message
generated upon reaching 12.5% remaining)
Engine Run Time 7-8 16 Hours of cut wire detection accumulated.
Message Type
The SXL1 Engineering message shows 0xD7 in the first byte denoting an Engineering message.
GPS Mean Search Time (Byte 2)
The second byte of the Engineering Message payload contains information about the average time to
acquire GPS location. A problem with the GPS hardware may be detected in mean time to search as
indicated by this data. Asset managers may use this data to find problematic installations as well as
make better estimates for terminal battery life of the product. Mean time is calculated using a
weighted average algorithm with a time base of at least 16 most recent transmissions.
If the Engineering Message was originated due to a First Run of the device, the GPS Mean Search
Time will hold the seconds required to perform the first fix.
# GPS Fails (Byte 3)
The third byte of the Engineering Message payload contains a count of the number of times the unit
failed to acquire a GPS fix since the last Engineering message. This count is cleared following
transmission of the Engineering message. This field will report a max value of 255, even if the
transmission count exceeds 255.
# Transmissions (Bytes 4:5)
The fourth and fifth byte of the Engineering Message payload contains a count of the number of
satellite transmissions since the device was enabled. Redundant messages are not included in the
count. All valid transmissions are included in the count including Engineering Messaging, and any
forced messages. This count is cleared by resetting the termination count via the configuration
connector. The fourth byte holds the most significant byte of the word. The count will roll-over 65535
to 0.
HW Configuration (Byte 6, bits 7:5)
The device reports the specific hardware configuration, primarily the battery capacity, for use by
remote monitors to determine end of battery life. The HW Configuration is set in the Reset Battery
Command (0x31). The following configurations are defined:
Bit pattern Configuration
000 Primary Battery 3200 mAh
Configuration Change (Byte 6 bits 4:2)
Modulo 7 count that increments each time the device is configured (counts 0 to 7 then starts again at
0).