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| There are three sleep modes: Sleep, Deep sleep and Online sleep mode.
| | {{Template:FMB Sleep modes|model=FMB125|usb_disconnected=* USB is not connected.}} |
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| ==Sleep mode==
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| While in sleep mode, {{{model|FMB640}}} sets GPS receiver to sleep mode but GSM/GPRS module stays active, in Sleep mode power usage can be decreased to save vehicle’s battery, because GPS module is turned off.
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| {{{model|FMB640}}} can enter sleep mode if ALL of these conditions are met:
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| *{{{model|FMB640}}} has to be configured to work in Sleep mode;
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| *Start-up timeout has elapsed (5 minutes after every restart of the device);
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| *No movement by accelerometer is detected;
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| *Ignition is off;
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| *USB cable is not connected. | |
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| {{{model|FMB640}}} exits sleep mode if ONE of the following conditions are true:
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| *Movement by accelerometer is detected (depends on accelerometer start settings);
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| *Ignition is turned on (driven logic high);
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| *USB cable is connected;
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| *HIGH or PANIC priority eventual record is detected;
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| While being in sleep mode FMB640:
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| *cannot save periodical or eventual records;
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| *send data to server;
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| ==Deep Sleep mode==
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| While in deep sleep mode, {{{model|FMB640}}} sets GPS receiver to sleep mode and turns off GSM/GPRS module (it is not possible to wake up device via SMS), therefore records with last good coordinates are being saved and sent to AVL server if configured (GSM/GPRS module is turned on to send data and after turned off). Depending on two configurable parameters, send period and min period, in Deep Sleep mode power usage can be decreased to save vehicle’s battery.
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| {{{model|FMB640}}} can enter deep sleep mode if ALL of these conditions are met:
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| * {{{model|FMB640}}} has to be configured in Deep Sleep Mode and Sleep Timeout is reached;
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| * Device must have time synchronized with GNSS satellites and have GPS fix;
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| * Ignition (configured ignition source) is off;
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| * Movement is not detected by accelerometer or configured movement source;
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| * ''Min. Record Saving Period'' ({{{ctrDaq|[[Template:FMB640 Data acquisition settings|Data Acquisition Mode settings]]}}}) must be larger than ''Open Link Timeout'' parameter, so that {{{model|FMB640}}} could close GPRS link;
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| * The difference between ''Send Period'' ({{{ctrDaq|[[Template:FMB640 Data acquisition settings|Data Acquisition Mode settings]]}}}) and ''Open Link Timeout'' must be more than 90 seconds, so that {{{model|FMB640}}} could close GPRS link within at least 90 seconds;
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| * Forced wakeup is not set;
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| * There are no SMS messages being received;
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| * Data socket(s) are closed;
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| * Data sending is not in progress;
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| * FOTA is not in progress.<br/>
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| {{{model|FMB640}}} exits deep sleep mode if ONE of the following conditions is true:
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| * Movement by accelerometer or configured movement source is detected;
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| * Ignition (configured ignition source) is turned on.
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| ==Online Deep Sleep mode==
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| In this mode the device works as in Deep Sleep mode, but without deregistering from GSM network. GSM part stays powered, so this increases power consumption. In this mode, device should send/receive SMS and make/accept calls. It does not close GPRS context if one was previously opened.
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| Conditions to enter Online Deep Sleep mode are the same as entering Deep Sleep mode.
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| {{{model|FMB640}}} exits Online Sleep mode if ONE of following conditions are true:
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| * Movement by accelerometer or configured movement source is detected;
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| * Ignition (configured Ignition Source) is turned on.
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