Grundfos TPE2 Installation And Operating Instructions Manual page 51

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 %, a setpoint of
85 % and an external setpoint of 60 %, the actual
setpoint is 0.60 x (85 - 25) + 25 = 61 %. See fig. 63.
In some cases, the maximum curve is limited to a
lower speed. See fig. 54.
Speed [%]
100
Setpoint
85
Actual setpoint
61
User-set min.
25
speed
0
0
0.5
0
0
0
4
-50
Fig. 63 Example of setpoint influence with
constant curve
Factory setting
See section 34. Factory settings.
16.19.1 Setpoint influence
Pump variant
TPE3, TPE3 D
TPE2, TPE2 D
The table below gives an overview of the types of
setpoint influence and the availability depending on
pump type.
"Setpoint influence"
Not active
Linear function
Linear with Stop
Influence table
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. 64.
Fixed
maximum
speed
Actual External
100 %
input setpoint
3.5 V
5 V
signal, 60 signal
10 V
%
20 mA
20 mA
204 C
Setpoint influence
●
●
Pump type
TPE3 TPE2
TPE3 D TPE2 D
● ●
● ●
● ●
● ●
Setpoint influence [%]
100
0
0
0.5
0
0
0
4
-50
Fig. 64 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 above 15 %, the operating
mode is changed back to Normal. See fig. 65.
Setpoint influence [%]
100
0
0 20
0.5
0
0
0
4
-50
Normal
Stop
Fig. 65 Linear with Stop
External
100 %
input
3.5 V
5 V
10 V
20 mA
20 mA
204 C
External
100 %
input
3.5 V
5 V
10 V
20 mA
20 mA
204 C
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