Siemens LMV50 Series Manual page 114

Settling of the
manipulated variable
Principle
Β
114/327
Building Technologies
Settling of the manipulated variable is used in modulating mode to avoid unnecessary
drive pulses, thus extending the life of the controlling elements.
Settling of the manipulated variable is active across the entire working range so that a
neutral zone is no longer required.
For setting the settling of the manipulated variable, a parameter is used that can be set
by you; it is called Minimum possible step of the controlling element.
With an external load controller, this parameter acts as a hysteresis on the current load.
This means that, as long as the new load is not outside the current load ±
MinActuatorStep, the controller does not react.
Example:
Current load = 40%
MinActuatorStep = 5%
If the setpoint is within 40% ±5%, there is no reaction from the control.
The system only reacts if the setpoint is above or below 40% ±5%.
With an internal load controller, the impact on the system is optimized in a similar way.
Note!
When setting the parameter MinActuatorStep, ensure that the setpoint is stable.
Parameter MinActuatorStep
Basic Documentation LMV5...
7 Boiler controller / load controller
CC1P7550en
22.05.2018