PD00E0XKNXFI00020100_HANDBOOK_EN.DOCX
PD00E0xKNX KNX PRESENCE DETECTORS RANGE Handbook
Eelectron SpA, Via Monteverdi 6,
I-20025 Legnano (MI), Italia
Tel: +39 0331.500802 Fax:+39 0331.564826
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C.F. e P.IVA 11666760159
Tribunale di Milano 359157-8760-07
CCIAA Milano 148549
32/46
on/off control in cooling mode:
Integral proportional control PWM
Integral proportional control with PWM is an
algorithm that reduces the effects of hysteresis
around the set point value by adjusting the controls
on the values ranging from 0% to 100% where 0%
Once a cycle time is defined the thermostat sets the
actuator to ON for a fraction of the cycle time and
OFF for the remaining part. Driving the actuator
with the control value of 80% means that it is active
(i.e., ON) for 80% of cycle time and OFF for the
remaining 20%
KNX PARAMETER
SETTINGS
Cycle time (TCp)
10, 20, 30, 60 min
It defines the time interval.
Proportional band (Bp)
1, 2, 3, 4, 5 °C
The proportional band BP is a range of temperatures
-
mode, within this interval thermostat controls the
temperature using the proportional algorithm; outside It
drives actuator always in ON or OFF.
When temperature is inside this range device wait the
end of the cycle time before calculating the duty cycle
of the next cycle.
When temperature is outside of this range : below
-
cooling mode it starts a new cycle as soon as
temperature enters the Bp
Integration time (Ti)
5 .. 250 min
Defines the integration time
Integral proportional contr. continuous
This setting i
control with PWM
parameters. This mode uses a 1 byte object (%
value) to send the command on the bus .
.
Fan coil on/off
Fan coil is a device that controls the flow of cooling
/ heating liquid driving a valve (2-pipe fan coil) or
two valves (4-pipe fan coil).
Liquid exchanges heat/cool with the environment
through a ventilation system controlled by a fan.
The fan is driven by an engine that typically has 3
windings that can be enabled at 3 distinct speeds.
Control logic for a 3 speed fan coil in
heating
:
When temperature increasing:
TARGET SETPOINT - DIFFERENTIAL
TARGET SETPOINT
THE TEMPERATURE MEASURE IS DOWN UNDER
THE SETPOINT VALUE - DIFFERENTIAL:
THE THERMOSTAT SENDS A COMMAND OFF
THE MEASURED TEMPERATURE RISE ABOVE
THE VALUE OF SETPOINT:
THERMOSTAT SENDS A ON COMMAND
REGULATION DIFFERENTIAL
DIFFERENTIAL
V
AL
V
E
ON
V
AL
V
E
O
FF
V2 ACTIVE
V1 ACTIVE
V1 ACTIVE
VENTILATION OFF
V3 ACTIVE
REGULATION DIFFERENTIAL: V1-SP
TEMP. SP Tsp
REGULATION DIFFERENTIAL: V1-V2
REGULATION DIFFERENTIAL: V2-V3
TEMP. SP TdrV1V2 TdrV2V3
TEMP. SP + TdrV1SP
TEMP. SP - TdrV1V2
