External Setpoint Function - Grundfos TPE 1000 Series Installation And Operating Instructions Manual

Pos. Description
1 Fixed maximum speed
2 User-set maximum speed
3 "Operating range"
4 User-set minimum speed
5 Fixed minimum speed
Factory setting
See section Factory settings.
Related information
30. Factory settings

13.16 External setpoint function

Pump variant
TPE, TPED, NBE,
NBGE, NKE, NKGE
TPE, TPED, NBE, NKE
Series 2000
You can influence the setpoint by an external signal,
either via one of the analog inputs or, if an advanced
functional module is fitted, via one of the Pt100/1000
inputs.
Before you can enable the External
setpoint function, you must set one of
the analog inputs or Pt100/1000 inputs to
Setpoint influence.
See sections "Analog inputs" and
"Pt100/1000 inputs".
If more than one input has been set to Setpoint
influence, the function selects the analog input with
the lowest number, for example Setting of pump,
and ignores the other inputs, for example Analog
input 3 or "Pt100/1000 input 1".
Example with constant pressure with linear
influence
Actual setpoint: actual input signal x (setpoint -
sensor min.) + sensor min.
At a lower sensor value of 0 bar, a setpoint of 2 bar
and an external setpoint of 60 %, the actual setpoint
is 0.60 x (2 - 0) + 0 = 1.2 bar.
[bar]
S
max
SP 2 100
SP
1.2
a
S
0 0
min
0
0.5
0
0
0
4
-50
Example of setpoint influence with sensor feedback
External setpoint
function
●
●
B
A
100 %
3.5 V
5 V
10 V
20 mA
20 mA
204º C
49