Grundfos Control MPC-Serie Installationsanleitung Seite 37

8.7.11 S-system configuration (4.1.8)
Fig. 49 S-system configuration
Description
The function allows you to invert the control of mains-operated
pumps (MPC-S). That is, to set whether pumps are to be started
or stopped depending on the actual value.
A start/stop band must be set in order to use this function. See
fig. 50.
Normal
A pump is stopped when the value becomes higher than Hset +
start/stop band. And a pump is started when the value becomes
lower than Hset. See fig. 50.
Inverse
A pump is started when the value becomes higher than Hset +
start/stop band. And a pump is stopped when the value becomes
lower than Hset. See fig. 50.
Normal
H [m]
Pump stops
Start/stop band
Hset
Pump starts
Time [s]
Fig. 50 Normal and inverse control
Setting range
• Selection of configuration (normal or inverse).
• Start/stop band.
Setting via the operating panel
• Settings > Primary controller > S-system configuration.
1. Select: Normal or Inverse.
2. Set: Start/stop band.
Factory setting
Normal.
Inverse
H [m]
Pump starts
Start/stop band
Hset
Pump stops
Time [s]
8.7.12 Setpoint ramp (4.1.9)
Fig. 51 Setpoint ramp
Description
When the function is enabled, setpoint changes are affected by
the setpoint ramp, and the setpoint changes gradually over a
period of time.
"Proportional pressure" or "Setpoint influence" are not affected by
this function.
If the multisensor function is enabled, it will have a
higher priority than the setpoint ramp which will be
overruled.
Setting range
The function can be enabled and "Change per minute" can be
set.
Setting via the operating panel
• Settings > Primary controller > Setpoint ramp.
1. Select: Enabled.
2. Set: Change per minute.
Factory setting
The function is disabled.
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