Grundfos CRIE - Setpoint influence functions

English (GB)
42
Example with constant curve with linear
influence
Actual setpoint: actual input signal x (setpoint -
user-set minimum speed) + user-set minimum
speed.
At a user-set minimum speed of 25 %, and a setpoint
of 85 % and an external setpoint of 60 %, the actual
setpoint is 0.60 x (85 - 25) + 25 = 61 %. See fig. 46.
Fig. 46 Example of setpoint influence with
constant curve
13.14.1 "Setpoint influence" functions
You can select these functions:
•Not active.
When set to Not active, the setpoint is not
influenced from any external function.
• Linear function.
The setpoint is influenced linearly from 0 to 100
%. See fig. 47.
Fig. 47 Linear function
• Linear with Stop
In the input signal range from 20 to 100 %, the
setpoint is influenced linearly.
If the input signal is below 10 %, the pump
changes to operating mode Stop.
If the input signal is increased above 15 %, the
operating mode is changed back to Normal.
See fig. 48.
Fig. 48 Linear with Stop
TM06 4525 2515TM06 4166 1615
100
0
100 %
0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204 C
25
61
85
External
setpoint
signal
Speed [%]
Fixed
maximum
speed
Actual
input
signal
(60 %)
User-set
min.
speed
Setpoint
Actual
setpoint
100
0
100 %0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204 C
Setpoint influence [%]
External
input
TM06 4167 1615
100
0
20 100 %0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204 C
Setpoint influence [%]
External
input
Normal
Stop