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There are two types of operations with I/O elements: simple monitoring and event
generating. Monitoring method is used when current I/O information needed with
regular GPS coordinates. Event generating method is used when additional AVL
packet is needed when current value of I/O exceeds predefined High and Low levels.
I/O settings allow defining I/O event criteria.
Figure 23. I/O settings
•
Enabled or disabled field
–
allows enabling I/O element so it is added to the data packet and is
sent to the server. By default all I/O element are disabled and FM3200 records only GPS
coordinates.
•
Priority
–
AVL packet priority
–
low, high or panic. Regular packets are sent as Low priority
records. When low priority event is triggered, FM3200 makes additional record with indication
that the reason for that was IO element change. When High priority is selected, module makes
additional record with high priority flag and sends event packet immediately to the server by
GPRS. Panic priority triggers same actions as high priority, but if GPRS fails, it sends AVL
packet using SMS mode if SMS is enabled in SMS settings.
•
High and Low levels
–
define I/O value range. If I/O value enters or exits this range, FM3200
generates event.
“Generate event” parameter defines when to generate event –
when value
enters defined range, exits it or both.
•
Averaging constant
–
it is an I/O event delay parameter. In some applications there is no need
to generate events on every I/O range enter/exit immediately. Sometimes it is necessary to
wait some time interval before event generating. Averaging constant allows to set I/O event
delay (averaging). If I/O value is entering or leaving predefined range, it must have same value
for Averaging constant time. 1 Averaging constant value equals 20 milliseconds.
Note: I/O element’s “Movement sensor”, Averaging constant is interpreted as
Start Move Timeout in seconds (from 1 to 59).
Start Move Timeout
–
is a time interval required for movement sensor to be in the
moving state, to consider vehicle as moving.
