Bedienungsanleitung Sorel STDC (Seite 20 von 24) (Englisch)

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Signal type

Only available, if the function is used on one of the V-outputs. The type of device to be controlled is set here.

0-10V: Controlled by a 0-10V signal.

PWM: Control by means of a PWM signal.

Output Signal

In this menu the type of actors are set: heating pumps have the greatest output with a small input signal, solar pumps in contrast have very

little output with a small input signal. Solar = normal, heating = inverted. For 0-10 V pump always choose the "Normal" setting

PWM / 0-10V off

This voltage / this signal is emitted if the actor is turned off (actor with cable break detection require a minimum voltage / a minimum signal).

PWM / 0-10V on

This voltage / signal is required the actuator to switch on and run at minimum speed.

PWM / 0-10V max.

With this value, the maximum voltage level / maximum signal can be specified for the highest speed of the actuator, which is used, for

example, during the purging or manual operation.

Show signal

Represents the set signal in a graphic and text overview.

Speed control

If the speed control is activated, it STDC offers the possibility through a special internal electronic system to change the speed of pumps

depending on the process. The relay R1, R2 and the Pwm and 0-10V outputs can work with the speed controlled.

This function should only be activated by a technician. Depending on the pump being used and the pump level, the minimum

speed may not be set too small, because the pump or the system may be damaged. The specifications from the affected man-

ufacturer must be observed for this! When in doubt, the min. speed and the pump level should be set too high instead of too low.

Variant

The following speed variants are available here:

Off: There is no speed regulation. The connected pump is only turned on or off with full speed.

Mode M1: The controller changes to the set max. speed after the purging time. 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 temperature difference between the ref-

erence 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 fol-

lowing, 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 possible.

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

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