Different ways to influence the operating mode - Basic Documentation - RDF600KN - RDF600KN/S - RDF600KN/VB

Semi-flush mount room thermostats with KNX communications RDF301, RDF301.50, RDF301.50H, RDF600KN, RDF600KN/VB, RDF600KN/S
Product Family
Desigo Open
Desigo PX Open
Product Group
Thermostats (temperature controller with sensor)
Building automation
Content Language
English
Content Type
Technical Documentation > Basic Documentation
Product Version
Status
Valid
Date
2020-02-21
Document No
CE1P3171en
Download ID
A6V10385333
Stock No.
S55770-T293
S55770-T400
S55770-T430
Product No.
RDF600KN
RDF600KN/S
RDF600KN/VB
Access level
Internet
File Type
html

Source for change of operating mode
ACS_Tool_Logo ACS

The operating mode can be influenced by different interventions.

The source of the effective room operating mode state can be monitored using the "Cause" diagnostic data point in the ACS tool, operator unit RMZ792 or web server OZW772.

Source Description Value of DP "Cause"
Local operation via operating mode button

  • Operating mode is not Auto Timer

  • No time schedule via bus

 Room operating mode selector (pre-selection)

  • Temporary Comfort extension is active

 Timer function

  • Operating mode switchover contact (RDF301..)

 Room operating mode contact

  • Window contact (RDF600KN…) 1)

 Window switch

  • Presence detector (RDF600KN…) 1)

 Presence detector

Bus command

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Room op. mode

  • "Window state" sent via bus (RDF301….)

 Room operating mode contact

  • "Window state" sent via bus (RDF600KN…) 1)

 Window switch

  • "Presence detector" sent via bus (RDF600KN…) 1)

 Presence detector

  • Time schedule available via bus
    🡪 local operating mode is set to Auto Timer

  • Time schedule sends Protection mode via bus
    🡪 operating mode cannot be changed locally

 Time switch

  1. RDF600KN, RDF600KN/VB SW version < V1.8 works like RDF301… with the operating mode switchover contact.

Priority of operating mode interventions

The following table shows the priorities of different interventions.

A lower number means a higher priority.

Priority Description Remark
1 Commissioning In parameter setting mode (highest priority), you can always command an operating mode independent of all other settings or intervention via bus and local input.
2 Protection mode via bus from time schedule Protection mode, sent by a time schedule, has priority 2.
It cannot be overridden by the user nor by an operating mode switchover contact.
3 Operating mode switchover contact
(RDF301…)		 If the contact is closed, the operating mode changes to Economy. This overrides the operating mode on the thermostat.
3 Window contact
(RDF600KN…) 1)		 If the contact is closed, the operating mode changes to Protection. This overrides the operating mode on the thermostat.
3 "Window state" via bus "Window state" sent via bus has the same effect as the local operating mode switchover contact (on RDF301…) or local window contact (on RDF600KN, RDF600KN/VB).
Note: Only one input source must be used, either local input X1/X2 or KNX bus.
4

Presence detector

(RDF600KN…) 1)

Standard presence mode: The thermostat switches to Comfort mode when the presence detector (local or on KNX) is active (room is occupied). *)

Hotel presence mode: When hotel guests leave their rooms, the thermostat switches to Economy mode and the local HMI (keys) is locked. Upon occupancy, the thermostat returns to the previous operating mode set by the hotel guests.
4 Presence detector via bus (on RDF600KN…) 1) "Presence detector" sent via bus has the same effect as the local presence detector.
4 Operating mode button The user can switch the operating mode using the operating mode button.
4 Operating mode via bus The operating mode can be changed via bus.
4 Temporary extended Comfort mode via operating mode button

The operating mode can be temporarily set from Economy to Comfort by pressing the operating mode button, if...

  • Economy was sent via bus

  • extended Comfort period >0 (parameter P68)
The last intervention wins, either locally or via bus.
4 Time schedule via bus The operating mode sent via bus can be overridden by all other interventions. Exception: Protection mode has priority 2.
Note: If the time schedule switches from Comfort to Economy, but the presence detector is still active (room occupied), the thermostat continues to work in Comfort mode for the period of occupancy.

1) RDF600KN, RDF600KN/VB SW version < V1.8 works like RDF301… with the operating mode switchover contact as window contact or presence detector.

Auto Timer mode Auto with time schedule via bus

If a time schedule via bus is present, e.g. from central control unit, then the Auto Timer mode Auto is active. The thermostat automatically changes between Auto Comfort and Auto Economy according to the time schedule via bus.

The display shows the Auto Timer mode symbol Auto along with the symbol for the effective room operating mode (Auto Comfort or Auto Economy ).

By pressing the operating mode button, you can change to another operating mode.

Automatic fan is the default fan speed in Auto Timer mode.

Behavior when bus sends new operating mode

Each time the time schedule sends a new operating mode (switching event), the operating mode of the thermostat is set back to Auto Timer mode. This is to assure that the room temperature is maintained according to the time schedule.

Pre-Comfort via bus

If the time schedule sends Pre-Comfort mode, then this mode will be transformed either into Economy (factory setting) or Comfort (selectable via parameter P88).

Behavior when bus sends Protection

No intervention is possible neither by the user nor by an operating mode switch-over contact, if Protection mode is set by the time schedule. OFF flashes on the display when the user presses a button.

Availability of Economy mode

The operating mode can be selected locally via the operating mode button.
The behavior of the operating mode button (user profile) can be defined via parameter P02, factory setting is P02 = 1.

P02 Without time schedule With time sche­dule via bus Description
1 -> -> Auto

  • Switching manually between 2 modes, Economy is not available (factory setting).

  • Suited for hotel guest rooms or commercial buildings.

  • If a time schedule via bus is available, then the Comfort mode can be temporarily extended (see below).
2 -> -> -> Auto -> ->

  • Switching manually between 3 modes.

  • Suited for homes and rooms where manual switching to Economy mode is desired.

Operating mode switchover contact

(window contact) (RDF301…)

The thermostat can be forced into Economy mode (e.g. when a window is opened, when a presence detector signals "no one present", when the keycard of a hotel room is withdrawn, etc). The contact can be connected to multifunctional input X1, X2. Set parameter P38, P40 to 3. P02 is not relevant. User operations are ineffective and "OFF" is displayed if the operating mode switch over contact is active.

Window contact

(RDF600KN…)

The thermostat can be forced into Protection mode when the window is opened. The contact can be connected to multifunctional input X1, X2. Set parameter P38, P40 to 3. User operations are ineffective and "OFF" is displayed if the window contact is active.

Note:

RDF600KN, RDF600KN/VB SW version < V1.8 works like RDF301… with the operating mode switchover function.

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Room operating mode: Window state

The function (operating mode switchover or window contact) is also available via the KNX signal "Window state", e.g. from a KNX switch or a KNX presence detector.

Note:

Only one input source must be used, either local input X1/X2 or KNX bus.
User operations are ineffective and "OFF" is displayed if the operating mode switchover/ window contact is active, or if "Window state" is sent via bus.

knx-logo.png
Room operating mode: Presence detector
(RDF600KN…)

The operating mode can be changed to Comfort and back to Economy mode depending of the room occupancy (room occupied or not occupied, via presence detector or keycard).

Standard presence mode:

(factory setting P77=1)

Behavior without time schedule:

  • Whenever the presence detector is activated then the operating mode of the thermostat goes to Comfort.

  • Whenever the presence detector is deactivated then the operating mode goes to Economy.

Behavior with time schedule via bus:

  • When Time-switch is on Protection
    - Presence detector has not influence on operating mode.

  • When Time-switch is on Economy
    - Whenever the presence detector is activated then the operating mode goes to Comfort.
    - Whenever the presence detector is deactivated then the operating mode goes to (Auto) Economy.

  • When Time-switch is on Comfort
    - Whenever the presence detector is activated then the operating mode keeps in Comfort.
    - Whenever the presence detector is deactivated then the operating mode keeps in Comfort.

Important: When Time-switch goes to Eco but Presence detector is still active, the operating mode keeps in Comfort mode until the Presence detector is inactive.

Note:

The contact (e.g. a card reader) can be connected to multifunctional input X1, X2 (set parameter P38 or P40 to 10) or the occupancy is sent via bus from a KNX presence detector sensor: Only one input source must be used, either local input X1/X2 or KNX bus.

Hotel presence mode:

(P77=2)

This function can be selected via parameter P77=2.

The presence detector status can be set via card reader or presence detector connected to the local multifunctional input (set P38 or P40 to 10) or via KNX (S-Mode).

Response when the room is unoccupied, i.e. when the key card is removed from the card reader or when the presence detector no longer detects movement.

  • The operating mode of the thermostat switches to Economy.

  • Changing the operating mode via local HMI is not possible (locked HMI) to ensure Economy is active when rooms are unoccupied.

Note:

The operating mode can still be changed via bus, e.g. the hotel front desk switches the operating mode to Protection upon check-out or extended vacancy.

Response when the room is occupied, i.e. when the key card is inserted or when the presence detector detects movement.

  • The thermostat returns to the last operating mode set for occupancy (either Protection or Comfort)

Note:

If the operating mode is changed via bus during vacancy, the change is not based on detection, e.g. front desk can set the operating mode to Comfort after guests check in.

Temporary timer to extend the Comfort mode

Comfort mode can be temporarily extended (e.g. working after business hour or on weekends) when the thermostat is in Economy mode. The operating mode button switches the operating mode back to Comfort for the period preset in P68.

Press the operating mode button again to stop the timer.

The following conditions must be fulfilled:

  • mode selection via operating mode button is set to "Protection-Auto"
    (P02 = 1) and the time schedule via bus is Economy.

  • Parameter P68 (extend Comfort period) is greater than 0.

During the temporary Comfort mode extension, symbol Timer appears.

If parameter P68 (extend Comfort period) = 0, extended Comfort cannot be activated; pressing the operating mode button will switch the thermostat to Protection.

If the operating mode switchover contact is active, pressing the operating mode button will show "OFF" (blinking).