DAB MCE-150/P Installations- Und Wartungsanleitungen Seite 120

6.6.13.1 Disabling functions associated with input
If an input is configured at 0, each function associated with this input will be disabled, regardless of the signal
on the terminals of the input itself.
6.6.13.2 Setting the external float function
The external float can be connected to any input, for all electrical connections, refer to paragraph 2.2.4.2. The
float function is implemented by setting the parameter INx associated with the input where the float is
connected, with one of the values of Table 23.
Activation of the external float function generates a system block. The function is envisaged to connect the
input to a signal from a float that indicates a water supply failure.
When this function is enabled, the symbol F1 is shown on the STATUS line of the main page.
The input must be activated for at least one second for the system to block and indicate the error F1.
When in the F1 error condition, the input must be deactivated for at least 30 seconds before the system
unblocks. The function behaviour is summarised in Table 23.
When several float functions are configured at the same time on different inputs, the system indicates F1 when
at least one function is activated and clears the alarm when none are activated.
Response of external float function according to setting of INx and input
Parameter
value
INx
1
2
6.6.13.3 Setting the auxiliary pressure input function
The auxiliary set points are disabled if the flow sensor is not used (FI=0) and when FZ is used in
minimum frequency mode (FZ ≠ 0).
The signal that enables an auxiliary set point can be supplied on any one of the 4 inputs, (for electrical
connections, refer to paragraph 2.2.4.2). The auxiliary set point function is obtained by setting parameter INx,
associated with the input on which the connection is made, in accordance with Table 24.
The auxiliary pressure function modifies the system setpoint from pressure SP (see section 6.3) to pressure
Pi . For electrical connections, see paragraph 2.2.4.2) where i represents the input used. In this way, as well
as SP there are four additional pressures available: P1, P2, P3, and P4.
When this function is enabled, the symbol Pi is shown on the STATUS line of the main page.
The input must be active for at least 1 second for the system to operate with the auxiliary setpoint.
When operating with the auxiliary setpoint, the input must not be active for at least 1 second to return to
operation with setpoint SP. The function behaviour is summarised in Table 24.
If several auxiliary pressure values are configured at the same time on different inputs, the system indicates
Pi when at least one function is activated. For simultaneous activations, the pressure reached will be the lowest
from those with the input active. The alarm is cleared when no input is activated.
Input
Input status
configuration
Active with high
signal on input
(NO)
Active with low
signal on input
(NO)
Table 25: External float function
ENGLISH
Operation
Absent
System block due to
Present lack of water from
external float
System block due to
Absent lack of water from
external float
Present
118
Display
Normal
Normal
None
F1
F1
None