Template:FMB Data acquisition settings

Data Acquisition modes are an essential part of FMB120 device, they are also highly configurable.
Through configuration user defines how records will be saved and sent. There are three different modes: Home, Roaming and Unknown. All these modes with configured data acquisition and send frequencies depend on current GSM Operator defined in the Operator list (see section GSM Operators settings) and are switched when GSM operator changes (e.g. vehicle passes through a country border).
If current GSM operator is defined as Home Operator, device will work in Home Data Acquisition mode, if current operator is defined as Roaming Operator, device will work in Roaming Data Acquisition mode, and if current operator code is not written in Roaming Operator list, device will work in Unknown Acquisition mode.
This functionality allows having different AVL records acquire and send parameter values when object is moving or standing still. Vehicle moving or stop state is defined by Stop Detection Source parameter. There are 4 ways for FMB120 to switch between Vehicle on Stop and Vehicle Moving modes, see first table in System settings.
FMB120 has 6 different modes. Operational logic is shown in the figure below.

If home operator is written to roaming operator list, it will still be detected as home operator.

Operator search is performed every 15 minutes. Depending on current GSM operator Home, Roaming or Unknown mode can be changed faster than every 15 minutes. This process is separate from operator search. Movement criteria are checked every second.

"Min Saved Records" defines minimum number of coordinates and I/O data that should be transferred with one connection to server. If FMB120 does not have enough coordinates to send to server, it will check again after time interval defined in "Sending Period".
"Send period" controls the frequency of GPRS data sent to server. Module makes attempts to send collected data to server every defined period. If it does not have enough records (depends on parameter Min. Saved Records described above), it tries again after the defined time interval.

Keep in mind that FMB120 operates in GMT:0 time zone, without daylight saving.

FMB120 is able to collect records using four methods at the same time: time, distance, angle and speed based data acquisition:

• Time based data acquiring (Min. period) – records are being acquired every time when a defined interval of time passes. Entering zero disables data acquisition based on time.
• Distance based data acquiring (Min. distance) – records are being acquired when the distance between previous coordinate and current position is greater than a defined parameter value. Entering zero disables data acquisition based on distance.
• Angle based data acquiring (Min. angle) – records are being acquired when angle difference between last recorded coordinate and current position is greater than a defined value. Entering zero disables data acquisition based on angle.
• Speed based data acquiring (Min. Speed Delta) – records are being acquired when speed difference between last recorded coordinate and current position is greater than a defined value. Entering zero disables data acquisition based on speed.