Operating Mode; Setpoint - Grundfos Control MPC Installation And Operating Instructions Manual

8.4.2 System (1.2)
Fig. 8 System
Description
This display shows the operational state of the system.
It is possible to go to subdisplays showing details.
The display makes it possible to open displays about the
following:
•

Operating mode

•

Setpoint

• Setpoint influence
• Measured values
• Analog inputs
• Log graph
• Battery status.
8.4.3 Operating mode (1.2.1)
Fig. 9 Operating mode
Description
This display shows the operating mode of the system and from
where it is controlled.
Operating modes
The system has six operating modes:
1. Normal
– The pumps adapt their performance to the requirement.
2. Max.
– The pumps run at a constant high speed. Normally, all
pumps run at maximum speed.
3. User-defined
– The pumps run at a constant speed set by the user. It is
usually is a performance between "Max." and "Min.".
4. Min.
– The pumps run at a constant low speed. Normally, one pump
is running at a speed of 70 %.
5. Stop
– All pumps have been stopped.
6. Emergency run
– The pumps run according to the setting made in display
Emergency run (4.3.5).
The performance required in these operating modes can be set in
menu "Settings":
• Max.
• Min.
• User-defined
• Emergency run.
See sections
8.7.35 Min., max. and user-defined duty (4.3.14)
and
8.7.25 Emergency run (4.3.5).
The actual operating mode can be controlled from four different
sources:
• fault
• external signal
• CU 352
• bus.
Control source
The system can be set to remote control via an external bus
(option). In this case, you must set a setpoint and an operating
mode via the bus.
In menu "Settings", you can select whether the CU 352 or the
external bus is to be the control source.
The status of this setting is shown in display "Operating mode".
8.4.4 Setpoint (1.2.2)
Fig. 10 Setpoint
Description
This display shows the selected setpoint and whether it comes
from the CU 352 or an external bus.
The display also shows all seven possible setpoints from the
CU 352 (for closed- and open-loop control). At the same time, the
selected setpoint is shown.
As it is a status display, no settings can be made.
Setpoints can be changed in menu "Operation" or "Settings". See
section
8.7.3 Alternative setpoints (4.1.2).
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