Predefined Setpoints; Limit-Exceeded Function - Grundfos CRE Notice D'installation Et De Fonctionnement

7.14 "Predefined setpoints"

Pump variant
CME
CRE, CRIE, CRNE, CRKE, SPKE, MTRE
You can set and activate seven predefined setpoints by
combining the input signals to digital inputs 2, 3 and 4. See the
table below.
Set the digital inputs 2, 3 and 4 to "Predefined setpoints" if all
seven predefined setpoints are to be used. You can also set one
or two of the digital inputs to "Predefined setpoints" but this limits
the number of predefined setpoints available.
"Digital inputs"
"Setpoint"
2 3 4
0 0 0 Normal setpoint or stop
1 0 0 "Predefined setpoint 1"
0 1 0 "Predefined setpoint 2"
1 1 0 "Predefined setpoint 3"
0 0 1 "Predefined setpoint 4"
1 0 1 "Predefined setpoint 5"
0 1 1 "Predefined setpoint 6"
1 1 1 "Predefined setpoint 7"
0: Open contact
1: Closed contact
Example
Figure 68 shows how you can use the digital inputs to set seven
predefined setpoints. Digital input 2 is open and digital inputs 3
and 4 are closed. If you compare with the table above, you can
see that "Predefined setpoint 6" is activated.
Digital input 4
Digital input 3
Digital input 2
Actual setpoint
Stop
Fig. 68 Principle sketch showing how predefined setpoints
function
If all digital inputs are open, the pump stops or runs at the normal
setpoint. Set the desired action with Grundfos GO or with the
advanced control panel.
Factory setting
See section 10. Technical data.
48
"Predefined
setpoints"
●
●
Setpoint 7
7 Setpoint 6
6
5
Setpoint 5
4
Setpoint 4
3
Setpoint 3
2
Setpoint 2
1
Setpoint 1
0
Normal
setpoint

7.15 "Limit-exceeded function"

Pump variant
CME
CRE, CRIE, CRNE, CRKE, SPKE,
MTRE
This function can monitor a measured parameter or one of the
internal values such as speed, motor load or motor current. If a
set limit is reached, a selected action can take place. You can set
two limit-exceeded functions meaning that you can monitor two
parameters or two limits of the same parameter simultaneously.
The function requires setting of the following:
"Measured"
Here you set the measured parameter which is to be monitored.
"Limit"
Here you set the limit which activates the function.
"Hysteresis band"
Here you set the hysteresis band.
"Limit exceeded when"
Here you can set if you want the function to activate when the
selected parameter exceeds or drops below the set limit.
• "Above limit".
The function is activated if the measured parameter exceeds
the set limit.
• "Below limit".
The function is activated if the measured parameter drops
below the set limit.
"Action"
If the value exceeds a limit, you can set an action. You can select
the following actions:
• "No action".
The pump remains in its current state. Use this setting if you
only want to have a relay output when the limit is reached. See
section 7.9 "Signal relays" 1 and 2 ("
• "Warning/alarm".
A warning is given.
• "Stop".
The pump stops.
• "Min.".
The pump reduces speed to minimum.
• "Max.".
The pump increases speed to maximum.
"Limit-exceeded
function"
●
●
Relay outputs"
).