Samson TROVIS 5575 - Creep Feed Rate Limitation over Binary Input; Limitation of the Calculated Capacity

Functions
WE Configuration
Flow rate limitation (capacity limi
-
tation) in Rk1 with pulses at input
WMZ
0 CO5 -> F10 - 0
Flow rate limitation in Rk1 using
0/4 to 20 mA at input WMZ
0
0
1.5
m
h
3
1.5
m
h
3
1.5
m
h
3
1.5
m
h
3
1.0
CO5 -> F11 - 1
Lower measuring range value / 0, 4 mA
Upper meas. range value 20 mA / 0.01 to 650
m
h
3
Max. limit value / 0.01 to 650
m
h
3
Max. limit value heating* / 0.01 to 650
m
h
3
Max. limit value DHW* / 0.01 to 650
m
h
3
Limiting factor / 0.1 to 10.0
* Not in Anl 1.0, 1.5, 1.6, 3.0, 3.5, 4.0 and 11.x
7.10.3 Creep feed rate limitation over binary input
It is possible to report to the controller when the creep feed rate has fallen below a certain
level by using a limit switch of the primary valve connected to the terminals 04/12. Either the
break contact (bE = 0) of the binary input or the make contact (bE=1) of the binary input can
be assigned to inform about the creep feed rate status. Shortly after the alert, the controller
closes the valve Rk1. As soon as the flow temperature falls below the set point by more than
5 °C after the valve has been closed, control operation is started again.
Function
WE Parameter level/Range of values
Creep feed rate limitation 0
1
CO5 -> F12 - 1
bE = 0, 1
7.10.4 Limitation of the calculated capacity
The controller is able to calculate the heat capacity used in the system and to limit it depend
-
ing on the operational circumstances. To achieve this, it uses a connected 0/4 to 20 mA sig
-
nal for the flow rate, a primary return flow sensor and a primary flow sensor. All limits are
given in the unit kilowatt [kW]. The primary flow sensor is connected at input FG2.
The measured temperature of the primary flow sensor [°C] and the current capacity [kW] are
displayed in the extended operating level (-> key number 1999).
The flow set point of control circuit Rk1 is reduced if the capacity reaches the current
Maxi
-
mum limit
. How strongly the controller responds is determined by the Limiting factor .
82 EB 5575 EN
System-wide functions