Tb: Water Lack Blockage Time; T1: Low Pressure Delay (Kiwa Function); T2: Delay In Switching Off; Gp: Proportional Gain Coefficient - DAB e.sybox Bedienungs- Und Wartungsanweisung

TB: Water lack blockage
time
T1: Low pressure delay
(kiwa function)
T2: Delay in switching off Sets the delay with which the inverter must switch off after switch-off conditions have been reached: plant under pressure
GP: Proportional gain
coefficient
GI: Integral gain
coefficient

RM: Maximum speed

Setting the number of devices and of reserves

NA: Active devices

NC: Simultaneous
devices
TECHNICAL ASSISTANCE MENU
Setting the reaction time of the water lack blockage allows you to select the time (in seconds) taken by the device to
indicate the lack of water.
The variation of this parameter may be useful if there is known to be a delay between the moment the motor is switched
on and the moment it actually begins to deliver. One example may be a plant where the suction pipe is particularly long
and there are some slight leaks. In this case the pipe in question may be discharged and, even though water is not
lacking, the electropump will take a certain time to reload, supply the flow and put the plant under pressure.
Sets the time when the inverter switches off after receiving the low pressure signal (see Setting low pressure detection
par. 7.6.15.5). The low pressure signal can be received on each of the 4 inputs by suitably configuring the input (see
Setup of auxiliary digital inputs IN1, IN2, IN3, IN4 par 7.6.
T1 can be set between 0 and 12 s. The factory setting is 2 s
and flow rate lower than the minimum flow.
T2 can be set between 2 and 120 s. The factory setting is 10 s.
Generally the proportional term must be increased for systems characterised by elasticity (for example with PVC pipes)
and lowered in rigid systems (for example with iron pipes).
To keep the pressure in the system constant, the inverter performs a type PI control on the measured pressure error.
Depending on this error the inverter calculates the power to be supplied to the motor. The behaviour of this control
depends on the set GP and GI parameters. To cope with the different behaviour of the various types of hydraulic plants
where the system can work, the inverter allows the selection of parameters different from those set by the factory. For
nearly all plants the factory-set GP and GI parameters are optimal. However, should any problems occur in adjustment,
these settings may be varied.
IIn the presence of large falls in pressure due to a sudden increase of the flow or a slow response of the system, increase
the value of GI. Instead, if there are swings in pressure around the setpoint value, decrease the value of GI.
IMPORTANT: To obtain satisfactory pressure adjustments, you generally have to adjust both GP and GI.
Sets a maximum limit on the number of pump revolutions.
Sets the maximum number of devices that participate in pumping.
It may have values between 1 and the number of devices present (max 4). The default value for NA is N, that is the
number of devices present in the chain; this means that if devices are added to or removed from the chain, NA always
has the value of the number of devices present, automatically detected. If a number different from N is set, this fixes the
maximum number of devices that can participate in pumping at the number set.
This parameter is used in cases where there is a limit on the pumps you can or want to be able to keep running, and if
you want to keep one or more devices as a reserve (see 7.6.10 IC: Configuration of the reserve and other examples
below).
On the same menu page you can also see (but not change) the other two system parameters linked to this, that is N,
the number of devices present, acquired automatically by the system, and NC, the maximum number of simultaneous
devices.
Sets the maximum number of devices that can work at the same time.
It may have values between 1 and NA. The default value of NC is NA, this means that even if NA increases, NC will
have the value NA. If a number different from NA is set, this releases you from NA and fixes the maximum number of
simultaneous devices at the number set. This parameter is used in cases where there is a limit on the pumps you can
or want to be able to keep running (see 7.6.10 IC: Configuration of the reserve and other examples below). On the same
menu page you can also see (but not change) the other two system parameters linked to this, that is N, the number of
devices present, read automatically by the system, and NA, the number of active devices.
ENGLISH
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