DAB e.sybox Bedienungs Und Wartungsanweisungen Seite 95

Low pressure signal input NC,
11
automatic and manual reset
Low pressure input NO only manual
12
reset
Low pressure input NC only manual
13
reset
Table 14: Configurations of the digital inputs
7.6.15.1 - Disabling the functions associated with the input
Setting 0 as the configuration value of an input, each function associated
with the input will be disabled irrespective of the signal present on the input
terminals.
7.6.15.2 - Setting external float function
The external float can be connected to any input, for the electrical connec-
tions refer to the control unit manual.
The float function is obtained, setting one of the values in Table 16 on the
parameter Ix, for the input to which the float has been connected.
The activation of the external float function generates the block of the sys-
tem. The function is conceived for connecting the input to a signal arriving
from a float which indicates lack of water.
When this function is active the float switch symbol is shown on the STA-
TUS line of the main page.
For the system to block and give the error signal F1, the input must be
activated for at least 1 sec.
When it is in error condition F1, the input must have been deactivated for
at least 30 sec before the system can be unblocked. The behaviour of the
function is summed up in Table 15.
When several float functions are configured at the same time on different
inputs, the system will indicate F1 when at least one function is activated
and will remove the alarm when none is activated.
F4 Behaviour of the external float function depending on INx and on the input
Value of
F4
Parameter
Ix
F4
1
2
7.6.15.3 - Setting auxiliary setpoint input function
The signal that enables an auxiliary setpoint can be supplied on any of the
4 inputs (for the electrical connections, refer to the control unit manual).
The auxiliary setpoint is obtained by setting the Ix parameter relating to the
input on which the connection has been made, in accordance with Table
17. Example:. to use Paux 2, set I2 on 3 or 4 and use input 2 on the control
unit; in this condition, if input 2 is energized, pressure Paux 2 will be pro-
duced and the display will show P2.
The auxiliary setpoint function modifies the system setpoint from pressure
SP (see par. 7.3 – Setpoint Menu ) to pressure Pi, where is represents the
input used. In this way, as well as SP, four other pressures are available,
P1, P2, P3, P4.
When this function is active the symbol Pi is shown on the main page.
For the system to work with the auxiliary setpoint, the input must be active
for at least 1 sec.
When you are working with the auxiliary setpoint, to return to working with
setpoint SP, the input must not be active for at least 1 sec. The behaviour
of the function is summed up in Table 16.
Input configu-
Input status Operation
ration
Absent
Active with high
System block
signal on input
for water lack by
(NO) Present
external float
System block
Active with low
Absent for water lack by
signal on input
external float
(NC)
Present
Table 15: External float function
GB
ENGLISH
Shown on
display
Normal
None
F1
F1
Normal
None
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