Basic Documentation
Table Of Contents
- 1 About this document
- 2 Overview
- 3 Notes
- 4 Functions
- 4.1 Temperature control
- 4.2 Operating modes
- 4.3 Room temperature setpoints
- 4.4 Application overview
- 4.5 Power supply selection for RDG200KN
- 4.6 Additional functions
- 4.7 Control sequences
- 4.7.1 Sequence overview (setting via P001)
- 4.7.2 Application mode
- 4.7.3 2-pipe fan coil unit
- 4.7.4 2-pipe fan coil unit with electric heater
- 4.7.5 2-pipe fan coil unit with radiator or floor heating
- 4.7.6 2-stage heating and cooling
- 4.7.7 4-pipe fan coil unit
- 4.7.8 4-pipe fan coil unit with electric heater
- 4.7.9 Chilled/heated ceiling and radiator applications
- 4.7.10 Compressor applications
- 4.7.11 Applications with external AQR sensor or QMX room operator unit
- 4.7.12 Setpoints and sequences
- 4.8 Control outputs
- 4.9 Fan control
- 4.10 Multifunctional input, digital input
- 4.11 Handling system faults
- 4.12 KNX communications
- 4.12.1 S-Mode
- 4.12.2 Master/slave configuration in KNX S-Mode
- 4.12.3 LTE-Mode
- 4.12.4 Zone addressing in LTE-Mode (with Synco)
- 4.12.5 Master/slave configuration in LTE-Mode
- 4.12.6 Example of heating and cooling demand zones
- 4.12.7 Send heartbeat and receive timeout
- 4.12.8 Startup
- 4.12.9 Heating and cooling demand
- 4.12.10 Fault and alarms function on KNX
- 4.13 Communication objects
- 4.14 Communication objects (LTE-Mode)
- 4.15 Control parameters
- 5 Supported KNX tools
- 6 Connection
- 7 Technical data
- 8 Dimensions
- Index
Functions
Additional functions
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4.6.8 Master/slave
The master/slave function has the following features:
● For large rooms / open spaces, to save energy by synchronizing HVAC
equipment and avoid running different equipment in heating and cooling at the
same room.
● The master provides the room temperature, setpoint, operating mode heating /
cooling sequence and humidity value and manual fan speed setting (if
requested) to all slaves in the same group.
● When P008 (standard display) is set to 1 (Setpoint), the current Comfort
setpoint is always displayed, even if the thermostat works in a different
operating mode.
● A group includes max.1 master and 9 slaves.
● Master and slaves can be bound as one group via setting their geographical
zone (apart.) P901 and geographical zone (room) P902 to same value.
● Synchronization works even if the master and slave are different products or
set with different applications.
● The thermostat can be set as slave via parameter P258 and each slave can be
identified via one identification number (P259). The identification is relevant
with alarm management between slave and master.
● When the thermostat is set as slave, the HMI is locked and user cannot
operate the thermostat locally. At the same time, some parameters are invisible
and non-accessible for setting (see Control parameters [➙ 126]).
● Fan state and setting of master/slave are independent. The fan state depends
on the fan setting of each device, i.e., master and slave can display different
fan speed.
● All master/slave setting are set via mobile app PCT Go, KNX tools ETS, Synco
ACS or locally on the HMI (parameter setting mode).
● Alarm indication: All active slave alarms, e.g. condensation alarm, are
displayed on the slave. At the same time only the higher priority alarm (see
Alarm management master / slave [➙ 64]) is displayed on the master with
slave identification number. This function is available only when a slave
identification number is set from 1 to 9. If the identification number is set to Off,
the slave does not send alarms to the master.