Grundfos Control MPC Montage- Und Betriebsanleitung Seite 25

Pos. Description
3
X
Flow rate [m /h]
Y Input [%] from external controller
F Flow rate
1-4 Pump 1-4
Setting range
These settings must be made in connection with open loop:
• Open loop
• Set setpoint 1, open loop
• External setpoint influence
• Normal.
Setting via the operating panel
Proceed as follows to set an external control source to control the
system:
• Operation > Further settings > Control mode.
• Select: Open loop.
1. Press × 2.
2. Select: Stop
3. Set to 100 %: Set setpoint 1, open loop.
4. Settings > Primary controller > External setpoint influence >
Go to setting of analog input.
5. Select Settings analog input and range.
6. Select:
• Measured input value. Display 4.3.8.1.1 appears.
• Select: 0-100 % signal.
7. Press .
8. Set the minimum and maximum sensor value.
9. Press × 2
10. Select:
• Input value to be influenced by
• 0-100 % signal.
11. Press .
12. Select: Set the influence function. See also section Setting of
influence function (4.1.3.2).
13. Set the number of points.
14. Set for Point 1:
• External input value
• Reduce setpoint to
15. Repeat step 14 for all selected points.
16. Press .
17. Set as seconds: Filter time.
18. Select: Enabled.
19. Press × 2.
20. Select:
• Operation
• Normal.
The system can now be controlled by an external controller.
Factory settings
Closed loop.
8.4.4 Alternative setpoints (2.1.3)
Alternative setpoints
Description
In addition to the primary setpoint 1, shown in display 2 in menu
Operation, you can set six alternative setpoints for closed-loop
control mode. Furthermore, you can set seven setpoints for open-
loop control mode.
You can activate one of the alternative setpoints by means
of external contacts. See sections Alternative setpoints
(4.1.2) and Alternative setpoints 2-7 (4.1.2.1 - 4.1.2.7).
Setting range
The setting range of setpoints for closed-loop control mode
depends on the range of the primary sensor. See section Primary
sensor (4.1.4).
In open-loop control mode, the setting range is 0-100 %.
Setting via the operating panel
• Operation > Further settings > Alternative setpoints.
Set the setpoint.
Factory settings
Setpoint 1 for closed-loop control mode is a value suitable for the
system in question.
All setpoints for open-loop control mode are 70 %.
Related information
8.6.3 Alternative setpoints (4.1.2)
8.6.4 Alternative setpoints 2-7 (4.1.2.1 - 4.1.2.7)
8.6.7 Primary sensor (4.1.4)
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