Grundfos Control DDD Montage- Und Betriebsanleitung Seite 56

8.7.57 Pumps outside duty range (4.4.7)
Fig. 111 Pumps outside duty range
Description
The function gives a warning if the duty point of the pumps moves
outside the defined range. For instance, if the inlet pressure
becomes lower than a minimum permissible value, thus causing a
risk of cavitation for some pump types.
The warning is given with a set time delay. You can set whether
the warning is to be reset automatically or manually when the
duty point comes within the defined duty range. You can also set
a relay output to be activated when the warning is given, and to
be deactivated when the warning is reset.
This function requires that the outlet pressure and the inlet
pressure (either measured or configured) or the differential
pressure of the pumps is monitored, and that CU 354 contains
valid pump data from either a GSC file or from manual input. See
section – Rated power Pnom.
Setting range
• Setting of manual or automatic resetting.
• Setting of warning delay.
Setting via operating panel
• Settings > Monitoring functions > Pumps outside duty range >
Manual or Auto > Set warning delay.
Factory setting
The function is disabled.
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8.7.58 Log values (4.4.9)
Fig. 112 Log values
Description
Select the values to be logged and the number of samples per
hour. The resulting timespan is shown. When the timespan has
elapsed, old logged values will be deleted and overwritten by the
new ones.
Log values
• Flow rate
• Speed of pumps
• Process value
• Setpoint
• Power consumption (DDD-E/-EC systems)
Setting range
Samples per hour: 1-3600.
Setting via operating panel
• Settings > Monitoring functions > Log values.
1. Set: Samples per hour.
2. Select the values to be logged.