TECHNICAL INSTRUCTIONS
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Visum Monitor
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J.Assy Agricultural
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TECHNICAL INSTRUCTIONS
9
8
It is important to highlight that the monitor work with
the number of the sensor that is communicating, if
some sensor loses the communication for some reason
the total number of sensors is not the number of row
installed. To check all the sensors state use
F1 function
.
All the situations presented below are unusual situation
and it is just to clarify some specific points. Normally all
the sensor sends the messages almost all at the same
time and those scenarios are not easy to happen in field.
A)
IF THE SYSTEM HAS MAXIMUM 12 ROWS:
To better explain we will use a number of 8 rows, but
all the explanation can be used for a number until 12.
With this condition (maximum of 12 rows the system will use
a logic involving 75% of the sensors to
detect a maneuver situation.
.
If the monitor identifies 8 sensor rows presents
(communicating) it will go to a maneuver state when
6 sensors (75% of the sensors) send a “no flow”
message. In that case when the first send a “no
flow” message it will wait until 5 seconds (maneuver
delay) for the second “no flow” message and that
will go on until 6 sensors send a “no flow” message.
S3
send a “no flow” message.
Maneuver delay starts to count.
After 3 seconds that the maneuver delay started
S7
send a “
no
flow
” message. Maneuver delay is reseted and starts over.
After 5 seconds any other message was received:
Monitor show a failure alert for row 3 and 7.
S3
send a “no flow” message.
Maneuver delay starts to count.
After 3 seconds that the maneuver delay started
S7
send
a “
no flow
” message.
Maneuver delay is reseted and starts over.
After 2 seconds
S6
and
S4
send a “no flow”
message. Maneuver delay is reset e starts over.
After 1 second
S1
and
S2
send a “no flow” message.
That instant the monitor enters in a maneuver state and
stay in that state until at least 4 sensors (50% of the
sensors) send a “flow” message.
SCENARIO 1A
SCENARIO 2A
1 2
3
4
5 6 7 8
1 2
3
4
5 6
7
8
Monitor alert:
row
3
and
7
3s
5s
1 2
3
4
5 6 7 8
1 2
3
4
5 6
7
8
1 2
3
4
5
6
7
8
3s
1 2
3
4
5
6
7
8
Monitor alert:
Maneuver
3s
2s
1s
The maneuver delay is also used to exit the maneuver
state and report possible failure remaining. So when 4
sensors (50% of the sensors) send a “flow” message
the monitor will wait 5 seconds (maneuver delay) before
reporting a flow failure.
