Page 4 / 8 Issue date: 24.11.2017
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: +49 2778 6960-0 · fax:-400 · www.thermokon.com · email@thermokon.de
JOY_Fancoil_EC_3AO_Modbus_Datasheet_v1.6.0+_en.docx © 2017
Function Description – Controller/Fan stages
The room thermostat has a "PI controller" for heating and cooling.
6WV (PI-controller 0..10 V)
The usage of a 6-way valve is set via the configuration software. In this case the same manipulated variable is output at
terminals 3 and 4.
The manipulated variable is output as a proportional control signal at the output for the 6-way valve. The type of valve used is set
via the configuration software.
You can choose from 2..10 V / 2..10 V INV (Belimo), 0..10 V DN15 / DN15 INV, DN20 / DN20 INV (Sauter).
Fan stages
In automatic mode the fan speed is linked to the controller. The assignment of the fan stage to the control (heating / cooling, only
heating, only cooling) is freely selectable. To ensure that the fan motor starts reliably, a period of time can be configured in which
the fan starts with maximal value. Using one or more time channels, the fan control have to be set per timechannel and per
period. Via the touch surface the user has the option to override the settings of the device every time. When the next time
channel starts, the fan speed is set to the configured value. The fan is set to automatic mode when the user changes the
occupancy state (occupied↔unoccupied).
EC Fan automatic mode
The 0..10 V (0..100%) control of the fan is proportional to the calculated manipulated variable of the PI controller.
Example:
Calculated manipulated variable 65% → Fan control with 6,5 V.
Calculated manipulated variable 22% → Fan control with 2,2 V.
EC Fan manual
Up to 5 steps (steps) can be set using the configuration software. The set number of steps is divided linearly to the manipulated
variable of 0..100%.
Example:
Max. steps (stages) = 5
Stage 1 = 20%
Stage 2 = 40%
Stage 3 = 60%
Stage 4 = 80%
Stage 5 = 100%
Heating/ cooling with PI-controller (0..10 V)
The time response of the PI control loop depends on the control parameters xp for the proportional area and tn for the reset time
of the integral range. In case of an error variable, the P portion immediately changes the position value proportionally to the error
variable, while the integral portion takes effect after a certain time.
The resulting manipulated variable is output as an analogue 0..10 V signal directly to the outputs.
Proportional range Xp
The proportional band is the deviation in which controller emits 100% value. A small Xp leads to a stronger control action in case
of slight deviations, but increases the oscillation tendency.
Integral time Tn
The reset time Tn is the time which the I-component of the controller would require to produce the same positioning signal that
the P-component forms immediately once the control deviation is present. The effect of the I component decreases with
increasing reset time.
Minimum and maximum actuating variable
This setting defines a fixed minimum or maximum value of the actuating variable. The parameter "Mode selection actuating
variable" can be used to select whether the minimum actuating variable a) is retained until the controller changes its mode or b)
whether the actuating variable of the controller is output to the output only when the minimum actuating variable is exceeded.
Main screen/ Value display
The Display shows the measured value of the internal sensor. The value of an external sensor will be shown if connected and
configured accordingly. The room thermostat controls in this case according to the external sensor.
Max. steps (stages) = 3
Stage 1 = 33%
Stage 2 = 66%
Stage 3 = 100%
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