GVS K-BUS
○
R
KNX/EIB
Thermostat
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11
example, when the current control values is 50% of the largest , the valve position will open to 50%
according to the control values ;If the output control values is the maximum , the valve is fully open.
Continuous control can realize the "on", "off" and "stop" three-step operations, specific action is shown in
the figure below:
Continuous control can realize the most precise temperature adjustment without quite big overshoot.
At the same time, the frequency of the positioning valve actuator can maintain at a low level. Continuous
control can also control the rise and fall valve of the fan coil or KNX valve actuator.
PWM control
PWM (pulse width modulation) control’s values is calculated according to the actual temperature
and set temperature, and then calculate the on and off time of the switch valve to control it, to achieve a
comfortable room temperature state. Switch valve only has "open" and "full close" two control
operations.PWM control needs to set a fixed cycle time at first, such as setting the PWM cycle for 15
minutes, when the control values is 20% of the maximum , the valve will open 15 * 20% = 3 minutes;
Close 15 * 80% = 12 minutes; When the control values is 50% of the maximum , the valve will open 15 *
50% = 7.5 minutes; Close 15 * 50% = 7.5 minutes. Schematic diagram is shown below:
