Theben KNX Series User Manual

The application programmes RAMSES 718 P/S
RAMSES 718 P / RAMSES 718 S 38
4.6.2 Actual value
On this parameter page the source is selected which is used as the actual value for control. This
can be the temperature sensor integrated in the device, an external sensor, or a combination of
up to 3 sensors.
 The control actual value might, depending on the selection of the source for the actual
value, deviate from the internally measured temperature (object temperature value).
Designation
Values
Description
Source for actual value
13
Control actual value.
Internal sensor
The device measures and
controls the room temperature
via the internal sensor. (Control
actual value = internally
measured temperature).
External actual value
object
The room temperature is solely
acquired via the bus.
Average value of
internal + ext. actual
value object
The device calculates the average
value of the room temperature
received from the bus and the
internal measurement.
Sensor at I3
External sensor at I3.
Average value from
internal
+ I3
Average value of the internal
value and the value measured at
I3.
Average value I3
+ Obj. Ext. actual value
Use average value of I3 and bus.
Average value of
internal
+ I3 + obj. actual ext.
actual value
Use average value from 3
sources: I3 + internal + bus.
Send control actual value in the
event of change of
not due to a change
only cyclical sending possible.
0.2 K, 0.3 K, 0.5 K, 0.7 K
1 K, 1.5 K, 2 K
Minimum change for resending.
Send control actual value
cyclically
no
Only send in the event of a
change.
yes
Send in the event of a change
and cyclically.
13
The selection possibilities with I3 are only available when the external inputs for temperature
measuremet are set, i.e. function of the external inputs I3 +I4 = temperature sensor input (see
parameter page General).

Theben KNX Series Specifications

General

Communication Protocol	KNX
Ambient Temperature	-5°C to +45°C
Storage Temperature	-25°C to +70°C
Protection Class	IP20
Relative Humidity	5% to 95%, non-condensing
Operating Voltage	24 V DC (via KNX bus)