39
19. 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.
19.1 Control without bus signal, local operating mode
Example:
If an external signal has activated the operating mode
Max.
, it will only be possible to stop the pump.
19.2 Control with bus signal, remote-controlled
operating mode
Example:
If the bus signal has activated the operating mode
Max.
, it will only be possible to stop the pump.
20. External control signals
20.1 Digital inputs
The overview shows functions in connection with closed contact.
The same function must not be selected for more than one input.
See fig. 21.
20.2 External setpoint
The setpoint can be remote-set by connecting an analog signal
transmitter to the setpoint input (terminal 53).
Open loop
In control mode
Open loop
(constant curve), the actual setpoint
can be set externally within the range from the min. curve to the
setpoint set via the CUE menu. See fig. 56.
Fig. 56
Relation between the actual setpoint and the external
setpoint signal in control mode Open loop
The On/Off button has the highest priority. In "off"
condition, pump operation is not possible.
Priority
CUE menu
External signal
1
Stop
2
Max.
3
Stop
4
Max.
5
Min.
Min.
6
Normal
Normal
Priority CUE menu
External signal Bus signal
1
Stop
2
Max.
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.
On/
Off
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.
Terminal Type
Function
53
AI 1
• External setpoint (0-10 V)
T
M
03 8
856 2
607
Terminal Type
Function
Setpoint
Max. curve
Setpoint, CUE menu
Min. curve
Ext. setpoint signal
Actual setpoint
0
10 V
Actual
setpoint
range
Grundfos.bk Page 39 Friday, July 30, 2010 10:10 PM
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Grundf
os CU
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