Siemens RDG20 KN Series User Manual

Functions
Communication objects (RDG2..KN)
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4.13.2 Description of communication objects
Obj
Object name
Function
Type/
length
Flags
1
System time
Time and date
19.001
8 bytes
CWU
System time for display on the room thermostat. See P009 (3 or 4)
2
Date
Date
11.001
3 bytes
CWU
Day, month and year for display on the room thermostat. See
P009 (3 or 4)
3
Time of day
Time of day
10.001
3 bytes
CWU
Another object for receiving the time of day for display on the room
thermostat. See P009 (3 or 4)
4
Fault information
Alarm Info
219.001
6 bytes
CRT
Common alarm output. If an alarm occurs, the alarm number is
transmitted.
5
Fault status
Alarm
1.005
1 bit
CRT
Common alarm output. If an alarm occurs, the alarm flag is set.
6
Fault
transmission
Disable
Enable
1.003
1 bit
CWU
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
mode:
Preselection
(receive)
Auto
Comfort
PreComf.
Economy
Protection
20.102
1 byte
CWU
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
mode:
Preselection
(send)
Auto
Comfort
Economy
Protection
20.102
1 byte
CRT
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.
Obj
Object name
Function
Type/
length
Flags
9
10
11
12
Room operating
mode:
Preselection
- Auto
- Comfort
- Economy
- Protection
Trigger
1.017
1 bit
CW
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
mode: Time
switch
Comfort
PreComf.
Economy
Protection
20.102
1 byte
CWU
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).
14
15
16
Room operating
mode: Time
switch
- Comfort
- Economy
- Protection
Trigger
1.017
1 bit
CW
Switch the HVAC mode to either Comfort, Economy or Protection
mode of manager.
17
Room operating
mode: Status
Comfort
Economy
Protection
20.102
1 byte
CRT
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).
18
19
20
Room operating
mode:
- Comfort status
- Economy status
- Protection
status
ON
OFF
1.011
1 bit
CRT
Corresponding communication object of manager sends "True".

Siemens RDG20 KN Series Specifications

General

Brand	Siemens
Model	RDG20 KN Series
Category	Thermostat
Language	English