DAB PUMPS PWM 201, Instruction For Installation And Maintenance

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ENGLISH
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On initial start-up and when default settings are restored, FN is set at 50 [Hz] and the correct value must be entered, as
stated on the pump
.
Each modification to FN is interpreted as a system change, and therefore the parameters FS, FL and FP are adjusted automatically
according to the set FN. On each variation to FN re-check FS, FL, FP to ensure settings are as required.
6.5.4 OD: Type of system
Set with two possible values (1 and 2) according to a rigid or flexible system.
The inverter leaves the factory set to mode 1, suited to most systems. In the event of pressure variations that cannot be stabilised by
adjusting parameters GI and GP, switch to mode 2.
IMPORTANT: In the two configurations, the values of adjustment parameters GP and GI also change. Furthermore, the values
of GP and GI set in mode 1 are stored in a different memory from the GP and GI values set in mode 2.
Therefore, for example, the value of GP in mode 1, when switching to mode 2, is replaced by the GP value of
mode 2, but is stored and restored on return to mode 1. The same value seen on display has a different meaning
in each of the modes, as the check algorithm is different.
6.5.5 RP: Setting the pressure drop for restart
This shows the drop in pressure, with respect to the value SP which causes pump restart.
For example, if the setpoint pressure is 3.0 [bar] and RP is 0.5 [bar] the pump is restarted at 2.5 [bar].
RP is normally set from a minimum of 0.1 to maximum 5 [bar]. In special conditions (for example in the case of a setpoint lower than
RP) this can be limited automatically.
To facilitate the work of the user, the RP setting page, highlighted below the symbol RP, shows the effective restart pressure; see
Figure 17.
Figure 17: Setting the restart pressure
6.5.6 AD: Address configuration
This is only applicable on multi-inverter systems. It sets the communication address to be assigned to the inverter. The possible
values are: automatic (default), or manually assigned address.
The manually assigned addresses can have values from 1 to 8. Configuration of the addresses must be uniform for all inverters in
the series: either all automatic or all manual. Identical addresses are not admitted.
If the address assignment modes are mixed (some manual and some automatic), and also if an address is duplicated, the relative
error is shown. The error is indicated with a flashing “E” in place of the unit address.
If selected assignment is automatic, each time the system is turned on, the addresses are assigned automatically and may be
different from the previous time; this has no effect on correct operation.
6.5.7 PR: Pressure sensor
Setting of the type of pressure sensor used. This parameter enables selection of a ratiometric or current type pressure sensor. For
each type of sensor, different full scales can be selected. When a ratiometric sensor is selected (default) the input Press 1 must be
used for connection. When a 4-20mA current sensor is used, the relative screw terminals on the input terminal board must be used.
(See Collegamento del sensore di pressione par 2.2.3.1)