8 Commissioning/Shutdown
112 of 212
PumpDrive 2
Table80: Setpoint ramp parameters
Parameter Description Possible settings Factory setting
3-6-4-6 Setpoint Ramp Time
Time defining the setpoint ramp
1 - 600 s 3 s
8.8.6 Motor standstill heater
The frequency inverter is equipped with a parameterisable motor standstill heater.
When the motor standstill heater is activated, a direct current is applied to the motor
windings while the motor is stopped in relation to the cool-down behaviour of the
motor winding. This ensures that sufficient heat is generated to prevent
condensation from building inside the motor as well as rules out frost damage that
can occur when the motors are stopped in a cold ambient environment.
NOTE
The motor standstill heater can only be activated at a standstill and in the OFF or
Auto Stop operating modes of the frequency inverter. If the frequency inverter is in
the "disabled" status due to e.g. an alert or another function, the standstill heater
is not switched on. In addition, to safeguard the operative performance of the
motor standstill heater, the PTC monitoring device of the motor must be activated
via the frequency inverter using parameter 3-2-3-1. If the PTC analysis function is
deactivated when the motor standstill heater is activated, PTC analysis
automatically becomes inactive.
The motor standstill heater can be activated or deactivated via the Motor Standstill
Heater parameter (3-2-5-1). The current status of the motor standstill heater is
displayed as an information message in the control panel of the frequency inverter.
The amount of heating current applied can be changed via the Heating Current
parameter (3-2-5-2). This parameter is a service parameter as it should only be
changed by qualified staff. The motor standstill heater usually operates with the
factory default settings. As soon as the system start procedure has been carried out
and the motor starts up, the motor standstill heater is automatically switched off.
Table81: Motor standstill heater parameters
Parameter Description Possible settings Factory setting
3-2-5-1 Motor Standstill Heater
Heating the motor via the motor windings
▪ ON
▪ OFF
OFF
3-2-5-2 Heating Current
Heating current in % of nominal motor
current
0,00…50,00 20,00
8.9 Device functions
8.9.1 Factory and user settings
NOTE
If the system has been commissioned/started up before, restoring the factory
settings will cause all parameter settings made so far to be deleted if they have not
been backed up using the service software or user settings.
Two additional user settings can be saved and loaded in the frequency inverter. The
factory settings cannot be overwritten and can be loaded with parameter (3-1-3-5).
NOTE
In a multiple pump configuration, Load Factory Settings (3-1-3-5) must be carried
out separately on all frequency inverters. It is sufficient to save the settings on just
one frequency inverter in the system. This approach must also be adopted when
loading and saving user settings.
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