GVS K-BUS
○
R
KNX/EIB
Thermostat
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35
actuator by Thermostat to switch on/off the electric valve and adjust the speed of fan to adjust the room
temperature, making the temperature vary within the predetermined range.
Figure 4.5 “Heating/cooling control” parameter setting interface
Parameter “Control type”
Options:
continuous PI control
switching PI control
two position control
fan coil control
If you choose "Continuous PI Control", the controlled object transmits of 0 ... 255 (corresponds to
0% ... 100%), 0% to close the valve, 100% to open the valve, if it is between 0% and 100% , the actuator
will adjust the controlling output according to the duty cycle of control target value. For example,
assuming the cycle is 10mins (set in the switch actuator), the controlling value is 60%, then the valve will
be opened for 6mins, closed for 4mins, all cycles in this way . Thermostat, according to temperature
conditions, ratio range and integration time, calculate the control value every 30 seconds , and output
the control value based on the output conditions. (Note: If no cycle parameter is set in the switch actuator,
the actuator will not cyclically transmit the controlling value according to its duty cycle. In this case, this
application of the panel may not be suitable for controlling switch actuator and applies only to actuators