The application programmes RAMSES 718 P/S
RAMSES 718 P / RAMSES 718 S 54
4.6.10 Additional stage cooling
Control is done via a proportional controller.
Control is done via a proportional
controller.
Continuous actuating value 0-
100 %
Pulse-width modulated switching
actuating value.
Difference between main stage
and additional stage
1.5 K, 2 K, 2.5 K
3 K, 3.5 K, 4 K
Defines the negative distance
between the current set point
and the set point of the
additional stage.
Example with base set point of
21 °C and difference of 1 K:
The main stage controls with the
base set point and the addition
stage controls with
base set point value – 1K = 20°C
3 K, 3.5 K, 4 K, 4.5 K
5 K, 5.5 K, 6 K, 6.5 K
7 K, 7.5 K, 8 K, 8.5 K
With continuous additional stage,
Professional setting for adapting
control response to the room.
Large values cause finer changes
to the control variables with the
same control deviation and more
precise control than smaller
Std.: 5 min
An actuation cycle consists of a
switching-on and a switching-off
process
and forms a PWM period.
Example:
Actuating value = 20 %,
PWM time = 10 min: In an
actuating cycle of 10 min, 2 min
switched on and 8 min switched
off
Transmission of actuating value
At change by 2%
At change by 3%
At change by 5%
At change by 7%
At change by 10%
After what percentage change in
the actuating value is the new
value to be transmitted.
Small values increase control
accuracy but also the bus load.
every 2 min.
every 3 min.
…
every 45 min.
How often should it be resent?
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