Grundfos Hydro Multi-E 2 CRIE 5-9 U2 A-A-A-A User Manual

English (GB)
29
13.7 External setpoint function
You can influence the setpoint with an external signal via
• one of the analog inputs
• one of the Pt100/1000 inputs if an advanced functional module
(FM 300) is fitted,
Example with constant pressure with linear influence
Actual setpoint: actual input signal x (setpoint - sensor min.) +
sensor min.
At a sensor min. 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.
See fig. 50.
Fig. 50 Example of setpoint influence with sensor feedback
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. 51.
Fig. 51 Example of setpoint influence with constant curve
13.7.1 "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. 52.
Fig. 52 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. 53.
Fig. 53 Linear with Stop
• "Influence table".
The setpoint is influenced by a curve made out of two to eight
points. There is a straight line between the points and a
horizontal line before the first point and after the last point.
Fig. 54 Influence table (example with five points)
Factory setting
See section 29. Factory settings.
Before you can enable the function, you must set one
of the analog inputs or Pt100/1000 inputs to "External
setpoint function".
See sections 13.1 Analog inputs and
13.2 Pt100/1000 inputs.
TM06 4165 1615
TM06 4525 2515
100
0
100 %
0
1.2
2
[bar]
0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204 C
Actual
input
signal
(60 %)
External
setpoint
signal
Setpoint
Sensor
max.
Sensor min.
Actual
setpoint
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
TM06 4166 1615
TM06 4167 1615
TM06 4170 1615
100
0
100 %0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204 C
Setpoint influence [%]
External
input
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
100
0
100 %0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204 C
Setpoint influence [%]
External
input

Grundfos Hydro Multi-E 2 CRIE 5-9 U2 A-A-A-A Specifications

General

Brand	Grundfos
Model	Hydro Multi-E 2 CRIE 5-9 U2 A-A-A-A
Category	Extender
Language	English