Operational Modes; Accelerometer; Virtual Odometer - Teltonika FM5500 User Manual

FM5500 can be managed by SMS commands (SMS Command list is described in SMS
Command List section) and GPRS commands (GPRS Command list is described in GPRS Command
List section). Module configuration can be performed over TCP or via SMS.

5.2 Operational Modes

FM5500 is designed to operate in two different modes: Normal Mode, Sleep mode and
Deep Sleep Mode (Standby mode). Normal Mode means that FM5500 is fully functional and
performs all the functionality mentioned above in Operational principals section.
Deep Sleep Mode is designed to dramatically reduce power consumption. It is a separate
mode and certain conditions must be fulfilled to switch from Normal operation and enter this
mode. Detailed information about how FM5500 enters/exits Deep Sleep Mode and what
functions does FM5500 perform while in this mode can be found in chapter 11.

5.3 Accelerometer

FM5500 has a built in 3 axis accelerometer which allows the device to indicate if vehicle is
moving or not, as well as measure acceleration. Accelerometer sensitivity can be configured – it
has 2 configurable global parameters: start and stop timeouts that define time intervals in
seconds. To indicate that a vehicle is moving, FM5500 constantly (in frequency of 10 Hz) checks
for g force change on X, Y and Z axes. If measured g force keeps exceeding the set limit (it is not
configurable) for defined time interval in "Movement Filter Start" field (Figure 12), then the
vehicle is considered as moving. Same settings for idle indication apply – if g force change is less
than the set limit for time interval defined in "Movement Filter Stop" field then the vehicle is
considered as idle (not moving).
Example for default parameters: Movement Filter Start = 1 and Movement Filter Stop = 30
means that movement will be detected after 1 second and stop will be detected after 30 seconds
of inactivity.

5.4 Virtual Odometer

Virtual odometer is used to calculate travelled distance in FM5500 as a separate I/O
element. When FM5500 detects movement, it starts counting distance using GPS signal: every
second it checks current location and calculates distance between current and previous point. It
keeps adding these intervals until it is time to make a record, then FM5500 records its location
and adds odometer value, which is equal to the sum of all distances, measured every second.
When record is made, odometer resets to zero and distance calculation starts all over again.
If continuous odometer is enabled, then it is not resetting its value. It remembers last value
and keeps counting giving total driven distance value. Start value can be set and driven distance
will be counted from this value. It will further increase.
Figure 18 Accelerometer settings
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