Grundfos CONTROL MPC Installation And Operating Instructions Manual page 20

3
Flow rate [m /h]
100
75
50
25
5 50 70.7
Fig. 23 Regulation curve for Control MPC-F in open loop
3
Flow rate [m /h]
100
75
50
25
5 50 70.7
Fig. 24 Regulation curve for Control MPC-S in open loop
Setting range
These settings must be made in connection with open loop:
• Stop of system.
• Selection of control mode Open loop.
• Setting of setpoint 1, open loop.
• Setting of external setpoint influence.
• Selection of operating mode Normal.
20
Flow rate
Pump 1
Pump 2
Pump 3
Pump 4
Input [%] from
86.6 100
external controller
Flow rate
Pump 1
Pump 2
Pump 3
Pump 4
Input [%] from
86.6 100
external controller
Setting via control panel
To set an external control source to control the system, proceed
as follows:
1. Mark the Operation menu with
2. Mark the operating mode Stop with
. The check mark in the right box shows that the
operation has been stopped.
3. Mark Further settings with
4. Mark Control mode with
5. Select Open loop with
6. Return by pressing
7. Mark Set setpoint 1, open loop with
8. Set the setpoint to 100 % with
9. Mark the Settings menu with
10. Mark Primary controller with
11. Mark External setpoint influence with
.
12. Mark Go to setting of analog input with
press .
13. Select the analog input with
14. Select the range of the analog input with
press . The selection is indicated by a check mark.
15. Mark Measured input value with
Now the display 4.3.8.1.1 appears.
16. Select 0-100 % signal with
17. Press to return to display 4.3.8.1.
18. Set the minimum sensor value with
.
19. Set the maximum sensor value with
with .
20. Return by pressing
21. Mark Input value to be influenced by with
press .
22. Mark the 0-100 % signal with
23. Return with .
24. Mark Set the influence function with
. For details, see section 11.7.6 Setting of influence
function (4.1.3.2).
25. Mark the menu line for number of points with
press .
26. Select the required number of points with
save with .
27. Mark External input value (point 1) with
28. Set the value of the external input value with
save with .
29. Mark Reduce setpoint to (point 1) with
30. Set the value as a percentage with
.
31. Repeat steps 27 to 31 for all chosen points.
32. Return with .
33. Mark Filter time with
or , and save with
34. Mark Activated with
mark in the right box shows that the function has been
activated.
35. Return by pressing
36. Mark the Operation menu with
37. Mark the operating mode Normal with
. The check mark in the right box shows that the
operation is normal. The booster system can now be
controlled by an external controller.
Factory setting
Closed-loop control.
.
or , and press
or , and press
or , and press
or , and press .
twice.
or .
, and save with
.
or , and press
or , and press
or
or , and press
or , and
or , and press
or , and press
or , and save with
or , and save
twice.
or
or , and press
or , and press
or
or
or .
or
or .
or , and save with
or , set the time in seconds with
.
or , and press . The check
twice.
.
or , and press
.
.
.
.
, and
.
.
.
, and
.
, and
, and
, and