Template:FMB I/O settings
When no I/O element is enabled, AVL packet comes with GNSS information only. After enabling I/O element(s) AVL packet along with GNSS information contains current value(s) of enabled I/O elements.
If the device is connected to configurator all current I/O values are displayed in Current Value column.
Priority field allows enabling I/O element(s) and setting them a priority so they are added to the data packet, which issent to the server. By default 12 I/O elements with low priority are enabled: Ignition, Movement, Data Mode, GSM Signal, Sleep Mode, GNSS Status, GNSS PDOP, GNSS HDOP, External Voltage, Speed, Battery Voltage and Battery Current. Priority level (AVL packet priority) can be Low, High or Panic. All records made by FMB120 are regular. Regular packets are sent as low priority records. When low priority event is triggered, FMB120 makes an additional record with indication that the reason for the event was an I/O element change (depends on Operand configuration). When high priority is selected, module makes additional record with high priority flag and sends event packet immediately to the server through GPRS. Panic priority triggers same actions as high priority, but if GPRS fails, it sends an AVL packet using SMS data if SMS data sending is enabled and the number is given in SMS/Call Settings.
High and Low levels define I/O value range. If I/O value enters or exits this range, FMB120 generates an event. Operand parameter defines when to generate event: On Exit, On Entrance, On Both, On Hysteresis and On Delta Change.
When Event Only is selected, I/O element status value will be appended only to eventual records, otherwise, I/O element status value will appear in each AVL record.
Operands
Operand On Exit
Record is generated when input value becomes higher than high limit or becomes lower than low limit.
Operand On Entrance
Record is generated when input value enters a range between high and low level limits.
Operand On Both
Record is generated by both (On Exit and On Entrance) operands logic at same time.
Operand Monitoring
No event at all. Values are recorded only when other triggers have worked.
Operand On Hysteresis
Record is generated when input value crosses the high limit value from below the low limit value or vice versa.
Operand On Change
Record is generated when input value changes.
Operand On Delta Change
Record is generated when input value changes and absolute value of change becomes equal or higher than the limit value.
Avg Const
If Avg Const value is 10, new value must be present for 1 second to register the change to a new value. Internal sampling is done every 40ms, so 25 samples are taken per second. To configure 5 seconds of averaging multiply 10 by 5 yielding 50 as Avg Const value. The same logic works even if device is in Deep Sleep mode.
Averaging follows RC exponential curves, see image below:
?????For Boolean values of 5τ, values is used, that means value change is taken when new values is averaged to more than 99.3%.
OBD II (Bluetooth) and LVCAN I/O elements
OBD II (Bluetooth) and LVCAN columns show I/O elements that can be obtained accordingly from OBD II Bluetooth dongle and LV-CAN200/ALL-CAN300 connected to FMB120 device. All I/O configuration is as described in I/O settings section, except OBD II (Bluetooth) I/O element do not have an averaging constant parameter.
Detailed description of LVCAN I/O element configuration is given in FMB120 with LV-CAN200 and ALL-CAN300 CAN adapters.