Setting Range; Setting Via Control Panel; Flow Rate; Regulation Curve For Mpc-F System In Open Loop - Grundfos Control MPC Installation And Operating Instructions Manual

3
Flow rate [m /h]
100
75
50
25
5 50 70.7
Fig. 25 Regulation curve for MPC-F system in open loop
3
Flow rate [m /h]
100
75
50
25
5 50 70.7 86.6
Fig. 26 Regulation curve for MPC-S system in open loop

Setting range

These settings must be made in connection with open loop:
• Open loop
• Set setpoint 1, open loop
• External setpoint influence
• Normal.
20

Flow rate

Pump 1
Pump 2
Pump 3
Pump 4
Input [%] from
external controller
86.6 100
Flow rate
Pump 1
Pump 2
Pump 3
Pump 4
Input [%] from
external controller
100

Setting via control panel

Proceed as follows to set an external control source to control the
system:
• Operation > Further settings > Control mode.
• Select: Open loop.
• Select: Stop
1. x 2.
2. Set to 100 %: Set setpoint 1, open loop.
3. Settings > Primary controller > External setpoint influence >
Go to setting of analog input.
4. Select analog input and range.
5. Select:
• Measured input value.
Display 4.3.8.1.1 appears.
• Select: 0-100 % signal.
6. .
7. Set the minimum and maximum sensor value.
8. x 2.
9. Select:
• Input value to be influenced by
• 0-100 % signal.
10. .
11. Select: Set the influence function.
(See also section 8.7.6.)
12. Set the number of points.
13. Set: External input value. (Point 1.)
14. Set as a percentage: Reduce setpoint to. (Point 1.)
15. Repeat steps 13 and 14 for all selected points.
16. .
17. Set as seconds: Filter time.
18. Select: Enabled.
19. x 2.
20. Select:
• Operation
• Normal.
The booster system can now be controlled by an external
controller.
Factory setting
Closed-loop control.