Description Of Communication Objects - Siemens RDG20 KN Series Basic Documentation

Functions
4
Communication objects

4.13.2 Description of communication objects

Obj Object name
1 System time Time and date
System time for display on the room thermostat. See P009 (3 or 4)
2 Date Date
Day, month and year for display on the room thermostat. See
P009 (3 or 4)
3 Time of day Time of day
Another object for receiving the time of day for display on the room
thermostat. See P009 (3 or 4)
4 Fault information Alarm Info
Common alarm output. If an alarm occurs, the alarm number is
transmitted.
5 Fault status Alarm
Common alarm output. If an alarm occurs, the alarm flag is set.
6 Fault Disable
transmission Enable
A supervisory alarm system can disable the broadcasting of
alarms sent by the devices. This has no impact on the local
display of alarms. After a timeout of 48 hours, the sending of faults
is automatically enabled again.
7 Room operating Auto
mode: Comfort
Preselection PreComf.
(receive) Economy
Protection
Controls the room operating mode selection of the thermostat
(Manager) via bus.
The command can also be submitted as four 1-bit communication
objects (9...12). The last interaction wins – either from local
operating mode button or via bus.
Note: The thermostat will transform Pre-Comfort either into
Economy or Comfort (selectable via P910).
8 Room operating Auto
mode: Comfort
Preselection Economy
(send) Protection
Sends the room operating mode selection of the thermostat
(Manager) via bus.
The command can also be submitted as four 1-bit communication
objects (9...12). The last interaction wins – either from local
operating mode button or via bus.
128 | 180
Type/
Function Flags
length
19.001 CWU
8 bytes
11.001 CWU
3 bytes
10.001 CWU
3 bytes
219.001 CRT
6 bytes
1.005 CRT
1 bit
1.003 CWU
1 bit
20.102 CWU
1 byte
20.102 CRT
1 byte
Obj Object name
Room operating Trigger
9 mode:
10 Preselection
11 - Auto
- Comfort
12
- Economy
- Protection
Switch room operating mode of manager to either Auto, Comfort,
Economy or Protection.
The last interaction wins – either from the local operating mode
button or via bus.
13 Room operating Comfort
mode: Time PreComf.
switch Economy
Protection
This information is provided by a central schedule or a supervisor
and defines the actual HVAC operating mode of manager.
The command can also be submitted via three 1-bit
communication objects (14...16).
Protection has the highest priority and cannot be overridden.
Note: The thermostat transforms Pre-Comfort either into Economy
or Comfort (selectable via P910).
Room operating Trigger
14 mode: Time
15 switch
16 - Comfort
- Economy
- Protection
Switch the HVAC mode to either Comfort, Economy or Protection
mode of manager.
17 Room operating Comfort
mode: Status Economy
Protection
Actual room operating mode used by the thermostat (Manager)
(considering time switch, user selection, window contact, etc.) This
state information is available via one 8-bit enumeration or three 1-
bit communication objects (18...20).
Room operating ON
18 mode: OFF
19 - Comfort status
20 - Economy status
- Protection
status
Corresponding communication object of manager sends "True".
Type/
Function Flags
length
1.017 CW
1 bit
20.102 CWU
1 byte
1.017 CW
1 bit
20.102 CRT
1 byte
1.011 CRT
1 bit
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