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Operating range
Set the operating range as follows:
• Set the min. speed within the range from fixed min. speed to
user-set max. speed.
• Set the max. speed within the range from user-set min. speed
to fixed max. speed.
The range between the user-set min. and max. speeds is the
operating range. See fig. 34.
Fig. 34 Example of min. and max. settings
Ramps
The setting of ramps is only relevant in the case of constant-curve
operation.
The ramps determine how quickly the pump can accelerate and
decelerate, respectively, during start/stop or setpoint changes.
The following can be set:
• acceleration time, 0.1 to 300 s
• deceleration time, 0.1 to 300 s.
The times apply to the acceleration from stop to rated speed and
the deceleration from rated speed to stop, respectively.
At short deceleration times, the deceleration of the pump may
depend on load and inertia as there is no possibility of actively
braking the pump.
If the power supply is switched off, the deceleration of the pump
will only depend on load and inertia.
Motor bearing monitoring
The motor bearing monitoring function can be set to these values:
•Active
• Not active
When the function is set to "Active", the controller will monitor the
operating pattern of the motor and calculate when the bearings
need to be replaced.
Motor bearings
This function can be set to these values:
•Replaced
• Nothing done
When the bearing monitoring function is active, the controller will
give a warning indication when the motor bearings are due to be
replaced. See section Alarm, page 19.
When the motor bearings have been replaced, confirm this action
in the above display by pressing [OK].
Standstill heating
The standstill heating function can be set to these values:
•Active
• Not active.
When the function is set to "Active", an AC voltage will be applied
to the motor windings. The applied voltage will ensure that
sufficient heat is generated to avoid condensation in the motor.
TM00 6785 5095
Max. speed (fixed)
User-set max. speed
Operating range
User-set min. speed
Min. speed (fixed)
24 %
12 %
0 %
67 %
100 %
Even if the function is changed to "Not active",
the controller will continue to calculate when the
bearings need to be replaced, but no warning will
be given when it is time for replacement.
When the function is changed back to "Active",
the accumulated calculations for bearing wear
will be used to calculate the replacement time.
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