reference sensors is above the set switch on temperature difference ∆T R1, the speed will be increased. If the controller has
decreased the speed of the pump to the smallest level and the ∆T between the reference sensors is still only ∆Toff, the pump will be
turned off.
Mode M2: The controller changes to the set min. speed after the Speed. If the temperature difference ∆T between the reference
sensors is above the set switch on temperature difference ∆T R1, the speed will be increased. If the temperature difference ∆T
between the reference sensors is below the set switch on temperature difference ∆T R1, the speed will be reduced. If the controller
has decreased the speed of the pump to the smallest level and the ∆T between the reference sensors is still only ∆Toff, the pump will
be turned off.
Mode M3: The controller changes to the set min. speed after the Speed. If the temperature on the reference sensors is above the set
value to be set in the following, the speed will be increased. If the temperature on the reference sensors is below the set value to be
set in the following, the speed will be reduced.
Purging time
For this time, the pump runs with its full speed (100%) in order to guarantee a secure start-up. Only after expiration of this purging time
will the pump have a controlled speed and will switch, depending on the set variant, to the max. or min. speed. Speed.
Sweep time
With the control time, the inertia of the speed control is determined in order to prevent strong temperature deviations as much as pos-
sible. The timespan is entered here, which is needed for a complete cycle from minimum speed to maximum speed.
Max. Speed
The maximum speed of the pump is determined here in %. During the setting, the pump runs in the respective speed and the flow can
be determined.
The specified percentages are variables, which may deviate more or less strongly depending on the system, pump and
pump level. 100% is the maximum possible power of the controller.
Min. Speed
The minimum speed of the pump is determined here. During the setting, the pump runs in the respective speed and the flow can be
determined.
The specified percentages are variables, which may deviate more or less strongly depending on the system, pump and
pump level. 100% is the maximum possible power of the controller.
Setpoint
This value is the control setpoint. If this value is below at the sensor, the speed is reduced. When it is exceeded, the speed is
increased.
Sensor Calibration
Deviations in the temperature values displayed, for example. due to cables which are too long or sensors which are not positioned
optimally can be compensated for manually here. The settings can be made for each individual sensor in steps of 0.5 °C.
Settings are only necessary in special cases at the time of initial commissioning by the specialist. Incorrect measurement
values can lead to unpredictable errors.
Relay functions
Free relays, i.e. relays not used in a basic scheme, can be assigned to various additional functions. Every additional function can only
be assigned once. Preset functions can be deselected. See " Function overview " on page 45
When assigning relays with functions, the activated function for already used relays must first be deactivated before a new
function can be selected.
R1 to R3: mechanical relay 230V
R1 to R4: mechanical relay 230V
V1 and V2: PWM and 0-10 V outputs See " External relay at signal output V(X) (0-10V / PWM) " on page 13
Please pay special attention to the relay’s technical information (see "Specifications“).
The symbols shown here are displayed on the main overview screen when the special function is activated.
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