Grundfos CUE User Manual

English (US)
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11.7.21 Ramps (3.24)
Set the time for each of the two ramps, ramp-up and ramp-down:
• Factory setting:
Depending on power size.
• The range of the ramp parameter:
1-3600 s.
The ramp-up time is the acceleration time from 0 rpm to the rated
motor speed. Choose a ramp-up time such that the output current
does not exceed the maximum current limit for the CUE.
The ramp-down time is the deceleration time from rated motor
speed to 0 rpm. Choose a ramp-down time such that no
overvoltage arises and such that the generated current does not
exceed the maximum current limit for the CUE.
Fig. 54 Ramp-up and ramp-down, display 3.24
12. Setting by means of PC Tool E-products
Special setup requirements differing from the settings available
via the CUE require the use of Grundfos PC Tool E-products.
This again requires the assistance of a Grundfos service
technician or engineer. Contact your local Grundfos company for
more information.
13. Priority of settings
The CUE can be controlled in various ways at the same time.
If two or more operating modes are active at the same time, the
operating mode with the highest priority will be in force.
13.1 Control without bus signal, local operating mode
Example: If an external signal has activated the "Max." operating
mode, it will only be possible to stop the pump.
13.2 Control with bus signal, remote-controlled
operating mode
Example: If the bus signal has activated the "Max." operating
mode, it will only be possible to stop the pump.
14. External control signals
14.1 Digital inputs
The overview shows functions in connection with closed contact.
The same function must not be selected for more than one input.
TM03 9439 0908
The on/off button has the highest priority. In "off"
condition, pump operation is not possible.
Rated
Ramp-up Ramp-down
Speed
Time
Minimum
Initial ramp Final ramp
Maximum
On/On/
Off
Priority CUE menu External signal
1Stop
2Max.
3 Stop
4
Max.
5 Min. Min.
6 Normal Normal
Priority CUE menu External signal Bus signal
1Stop
2Max.
3 Stop Stop
4
Max.
5
Min.
6
Normal
Terminal Type Function
18 DI 1 • Start/stop of pump
19 DI 2
• Min. (min. curve)
• Max. (max. curve)
• Ext. fault (external fault)
•Flow switch
• Alarm reset
• Dry running (from external sensor)
• Not active.
32 DI 3
• Min. (min. curve)
• Max. (max. curve)
• Ext. fault (external fault)
•Flow switch
• Alarm reset
• Dry running (from external sensor)
• Not active.
33 DI 4
• Min. (min. curve)
• Max. (max. curve)
• Ext. fault (external fault)
•Flow switch
• Alarm reset
• Dry running (from external sensor)
• Accumulated flow (pulse flow)
• Not active.

Grundfos CUE Specifications

General

Brand	Grundfos
Model	CUE
Category	Media Converter
Language	English