Grundfos TPE3 - External Setpoint Influence; Setpoint Influence

35
English (US)
15.15 Setpoint influence
15.15.1 External setpoint influence
You can influence the setpoint by an external signal, either via
one of the analog inputs or, if you fit an advanced functional
module, via one of the Pt100/1000 inputs.
If more than one input has been set up for setpoint influence, the
function will select the analog input with the lowest number, for
example "Analog input 2", and ignore the other inputs, for
example "Analog input 3" or "Pt100/1000 input 1".
Example
See fig. 55.
At a lower sensor value of 0 psi, a set setpoint of 29 psi and an
external setpoint of 60 %, the actual setpoint is 0.60 x (29 - 0) + 0
= 17.4 psi.
Actual setpoint = actual input signal x (setpoint - lower value) +
lower value.
Fig. 55 Example of setpoint influence
The table below gives an overview of the types of setpoint
influence and the availability depending on pump type.
You can select these functions:
• Not active
When set to "Not active", the setpoint will not be influenced
from any external function.
• Linear function
The setpoint is influenced linearly from 0 to 100 %. See fig. 56.
Fig. 56 Linear function
•"Linear with Stop" and "Linear with Min."
– 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 will change to
operating mode "Stop".
If the input signal is increased above 15 %, the operating
mode will be changed back to "Normal".
See fig. 57.
– Linear with Min.
In the input signal range from 20 to 100 %, the setpoint is
influenced linearly.
If the input signal is below 10 %, the pump will change to
operating mode "Min.".
If the input signal is increased above 15 %, the operating
mode will be changed back to "Normal".
See fig. 57.
Fig. 57 "Linear with Stop" and "Linear with Min."
Pump variant Setpoint influence
TPE3 (D) ●
TPE2 (D) ●
Note
Note
Before you can enable the " Digital inputs ", set one
of the analog inputs or Pt100/1000 inputs to
"
External setpoint function ".
See sections 15.7 Analog inputs and
15.8 Pt100/1000 inputs.
TM06 0854 1014
Type of setpoint influence
Pump type
TPE3 (D) TPE2 (D)
Not active ●●
Linear function ●●
Linear with Stop - ●
Linear with Min. ●●
Inverse function - ●
Inverse with Stop - ●
Inverse with Min. - ●
Influence table - ●
Influence table with Stop at Min. - ●
Influence table with Stop at Max. - ●
100
0
0 100
0
17.4
29
[PSI]
Setpoint influence [%]
External
setpoint
signal [%]
Actual
input
signal
Actual setpoint
Setpoint
Upper value
Lower value
TM05 6280 4612TM05 6281 4612
100
0
100
20 40 60 80
Setpoint influence [%]
External input
[%]
100
0
100
20 40 60 80
Setpoint influence [%]
External
input [%]
Normal
Min. or
Stop