Grundfos Control MPC-Serie Installationsanleitung Seite 57

8.7.49 Multisensor settings (4.3.25)
Fig. 100Multisensor settings
Description
The function is designed for controlling up to six different zones in
a HVAC system with a defined differential-pressure band. If one
of the "Multisensor" signals are outside the specific sensor limits
(minimum or maximum), the function will influence the setpoint
(SP) up or down to ensure that the specific sensor or zone is kept
within its pressure band.
You can adjust the reaction of the setpoint influence by the
means of dedicated "Setpoint alternation", Kp and Ti values.
In case more sensors are either under or above their limits, you
can set a priority between the sensors. Furthermore, the system
can optimise the actual setpoint if "Energy-saving mode" is
activated by reducing the actual setpoint until the minimum limit
of one of the multisensors is reached.
If the multisensor function is enabled, it will have
higher priority and the following programs will be
overruled:
• Clock program
• Proportional pressure
• Alternative setpoint
• External setpoint influence
• Setpoint ramp.
Setting range
• Number of sensors
• Setpoint limits:The range with the function will operate the
control setpoint up or down according to the "Multisensor"
feedback.
• Setpoint alternation- Gain Kp- Integral time Ti
• Energy-saving modeIn this mode, the system ramps down the
actual setpoint towards the minimum limit for one of the
"Multisensor".
• Control mode- Minimum limit:In this mode, the actual setpoint
will be ramped up or down by the remote sensor with the
highest priority if the remote sensor is outside its "Minimum
limit" or "Maximum limit". - Minimum mode:In this mode, the
actual setpoint must be ramped up by the remote sensors if
one or more of the remote sensors are below their "Minimum
limit".
Setting via the operating panel
• Settings > Secondary functions > Multisensor settings.
1. Select: Enable.
2. Set: Number of sensors
3. Set: Setpoint limits (Select: minimum and maximum).
4. Set: Setpoint alternation (Gain Kp and Integral Ti)
5. Enable "Energy-saving mode" if requested
6. Set: Control mode (Select: Priority mode or Minimum mode).
7. Press "Multisensor settings" to set the individual settings for
each multisensor.
8.7.50 Multisensor settings (4.3.25.1)
Fig. 101Multisensor settings
Description
Each "Multisensor" needs to be defined in order for the function to
work correctly.
Setting range
• Name
• Sensor limits
• Sensor priority (1-6, High = 1)
• Filter factor [second] (time period where the remote sensor
feedback signal is averaged over.)
• Sensor source
Local = AI
Bus = BUS communication
Setting via the operating panel
• Settings > Secondary functions > Multisensor settings >
Multisensor settings.
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