Setting functions
8.7 Application-specific functions
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
313
The energy-saving mode is especially suitable for pumps and fans. Typical applications
include pressure and temperature controls.
The energy-saving mode offers the advantages of energy saving, lowering mechanical wear
and reduced noise.
Note
If a motorized potentiometer in the inverter delivers the setpoint in energy
-saving mode, you
have to set p1030.4 and p2230.4 = 1.
In energy-saving mode the inverter switches the motor off if the device conditions permit this
and back on again if required.
The energy-saving mode starts as soon as the motor speed drops below the energy-saving
mode start speed. The inverter switches the motor off only after an adjustable amount of
time has elapsed. If, during this time, the speed setpoint increases above the energy-saving
mode start speed due to pressure or temperature changes, the energy-saving mode is exited
and the inverter goes into normal operation.
In energy-saving mode the motor is switched off but the inverter continues to monitor the
speed setpoint or technology controller variation.
●
For an external setpoint setting (without technology controller) the speed setpoint is
monitored
and the motor is switched-on again as soon as the setpoint increases above
the restart speed. The restart speed is calculated as follows: Restart
speed = p1080 + p2390 + p2393.
In the factory setting, the positive speed setpoint is monitored, i.e. the motor is switched
on as soon as the setpoint exceeds the restart speed.
If you also want to monitor the negative speed setpoint, you have to monitor the setpoint
amount. This can be set using p1110 = 0.
Additional setting options are described in the List Manual, in function diagrams 3030 and
3040 as well as in the associated parameter descriptions.
●
When the setpoint setting is entered from the technology controller, the technology
controller deviation (r2273) is monitored
and the motor is switched on if the deviation of
the technology controller exceeds the energy-saving mode restart value (p2392).
In the factory setting, only the positive deviation of the technology controller is monitored,
i.e. the motor is switched on as soon as the technology controller deviation is greater than
the energy-saving mode restart value (p2392).
To switch the motor back on for negative technology controller deviation, the value of the
deviation must be monitored.
Set p2298 = 2292 and set the minimum threshold in p2292.
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