Theben KNX Series User Manual

The application programmes RAMSES 718 P/S
RAMSES 718 P / RAMSES 718 S 40
Designation
Values
Description
Emergency program in case of
actual value failure
with PI controller: 0%,
with 2-point controller:
Off
with PI controller: 10%,
with 2-point controller:
On
with PI controller: 20%,
with 2-point controller:
On
with PI controller: 30%,
with 2-point controller:
On
with PI controller: 50%,
with 2-point controller:
On
The emergency program will only
be executed if the selected
Source for actual value provides
no valid value anymore.
The heating/cooling will then be
controlled with a fixed actuating
value.
This might be the case if only
one Source for actual value is
selected, e.g. only I3.
In case of actual value failure,
the value of the actuating value
for the emergency program will,
depending on the operating
mode (heating/cooling), be
output to the corresponding
object.
 As long as at least one
valid actual value remains
available, this will be
continued to be used for
control, and the
emergency program
remains inactive. This is
the case if the average
value is determined out of
2 or 3 sources.
Example:
Average value of internal + I3.
If the sensor at I3 fails, the RTC
controls with the remaining, i.e.
with the internal sensor, in this
case.
Actual value failure telegram
always cyclically
The object sends the current
status always cyclically and in
the event of a change:
Error = 1, no error = 0
only send cyclically in
case of an error
Only sends in case of an error,
cyclically and in the event of a
change: error = 1.
Send cyclically
every min
every 2 min.
every 3 min.
…
every 30 min.
…
every 60 min.
How often should it be resent?

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)