26
When a malfunction has taken place and then it
has been repaired, the “Manual Function” has to be
used in order to finish it and continue with the irriga-
tion proceeding at that moment at the same point
where it stopped.
Each one of the four filter group the unit allows
can start the cleaning by connecting a “
Differential
pressure gauge
”, which measures the difference of
pressure between the input and output of the filters.
When the power is switched on and the irrigation is
working, after the “Detection delay” temporization, it
will clean the filters.
For the 06 to 09 “
Stop
” functions, the sensor op-
eration can be configured in three different ways, be-
sides this, the stop inputs that each irrigation sector
has to use are configured at the “Sector parameters”
sector.
The “Temporary” one will cancel the irrigation of
the sector or group of sectors in order to go to the
following sub-program. If the program is reinitiated, it
will try to irrigate the sectors were previously affected
by the input.
With “Conditional” the irrigation of the sector or
group of sectors is stopped and adjourned as long as
the sensor is connected. Once the input is discon-
nected, the irrigation will continue at the same point
where it stopped.
At the “Definitive”, all the sectors assigned to the
sensor will stop operation definitively. Enter at the
“Function - Manual - Malfunctions” to end the stop.
If in an irrigation program, a group of sectors is ir-
rigating and a “Stop” sensor is activated, all the group
will stop irrigating, even though not all of them are
assigned to the sensor.
The “
Intrusion alarm
” function is used to protect
from vandalism the installation. To do so, connect the
protection elements such as radars, door sensors, etc.
in series with the normally closed contacts, to the in-
put; the first one that opens, after the detection delay
temporization, will activate the alarm output and, if the
SMS messages option is installed, will send a text
message to a mobile phone (SMS messages sending
option).
The four possible
irrigation meters
, functions 11
to 14, can work with pulses transmitter from 1 to
10.000 liters.
It is necessary to enter the value in seconds of
the time between two pulses with the lowest operation
flow at the “Maximum time between pulses”. This de-
tects the fact that there is no irrigation flow. As an ex-
ample, we will calculate the time for a flow of 2 m
3
/h
and a meter of 100 liters:
2000 L/h
3600 = 0.5555 L/sec.
100
0.5555 = 180 seconds.
It is important to give this value when doing the
control by lack of flow.
The Agrónic 4000 allows us, as well, to work with
the
irrigation meter by frequency
, asking for the
cycles per liter the meter sends. At the meter specifi-
cations the cycles per liter in relation to the diameter of
the pipe line will be indicated.
For the
fertilizers meters
(codes 15 to 22 and 27
to 34), the operation philosophy is the same as that for
the irrigation ones, with the difference that the
pulse
value is in centiliters (100 centiliters = 1 liter), from 1
to 1.000 centiliters. When operating by
frequency
, the
cycles have to be entered per each centiliter (cl).
Functions 23 to 34 of the frequency meters can
only operate with inputs 1 to 7 of the Agrónic 4000
base.
The “
Rain gauge
” function, number 35, is used
to count the liters per m
2
of precipitation, to do so,
enter the value corresponding to each pulse given by
the rain gauge at the “liters per pulse” question. Fur-
ther on we will see it can be used to condition the
irrigation and for the history record. The digital sensor
that has to be used is number 12.
A total of 8 sensors, with function codes 36 to 43,
are configured for the ”
Programs starting
”, will set
the starting of an irrigation program configured to be
conditioned by the sensor (section [6.7] of “Parame-
ters - Programs”). The question “Stop Y/N” allows
answering “YES”, to stop the program by its input
when disconnecting it, and with “NO” it will only do
the start, finishing when the application of time or vol-
ume programmed ends.
The “
Pump Stop
” functions have a sensor that
can be assigned to each pump. This allows the pump
or general irrigation valve to stop without affecting the
irrigation cycle in process. This is useful when manag-
ing different pumps within a priority system.
[ values for the DIESEL control option ]
When Agrónic carries out “Diesel control”, it is
necessary to connect the digital input with a “
Diesel
detector
” to the oil pressure switch (monocontact) or
some element on the pump to tell us when it is operat-
ing. This input is used to carry out start-up attempts
and once operating, to detect a failure in oil pressure
or the sensor element.
6.4.2. Analog sensors
The “Analog” sector has to be chosen at the “Pa-
rameters - Sensors” menu.
SENSOR PARAMETERS
Digital : 1
Analog : 2
The unit offers to control up to a total of 40 differ-
ent sensors. Each one will be configured an input
where it will be connected and the format of the sen-
sor.
