22-43 Wake-up Speed [Hz]
Range: Function:
Size
related*
[ 0 -
par.
4-14
Hz]
To be used if 0-02 Motor Speed Unit, has
been set for Hz (parameter not visible if RPM
selected). Only to be used if
parameter 1-00 Configuration Mode, is set for
Open Loop and speed reference is applied
by an external controller controlling the
pressure.
Set the reference speed at which the Sleep
Mode should be cancelled.
22-44 Wake-up Ref./FB Difference
Range: Function:
10
%*
[0 -
100 %]
Only to be used if parameter 1-00 Configuration
Mode, is set for Closed Loop and the integrated
PI controller is used for controlling the pressure.
Set the pressure drop allowed in percentage of
set point for the pressure (P
set
) before cancelling
the Sleep Mode.
NOTICE
If used in application where the
integrated PI controller is set for inverse
control in 20-71 PID Performance, the
value set in 22-44 Wake-up Ref./FB
Difference will automatically be added.
22-45 Setpoint Boost
Range: Function:
0
%*
[-100
- 100
%]
Only to be used if parameter 1-00 Configuration
Mode, is set for Closed Loop and the integrated PI
controller is used. In systems with e.g. constant
pressure control, it is advantageous to increase the
system pressure before the motor is stopped. This
extends the time in which the motor is stopped
and help to avoid frequent start/stop.
Set the desired over pressure/temperature in
percentage of set point for the pressure (P
set
)/
temperature before entering the Sleep Mode.
If setting for 5%, the boost pressure is P
set
*1.05.
The negative values can be used for e.g. cooling
tower control where a negative change is needed.
22-46 Maximum Boost Time
Range: Function:
60
s*
[0 -
600 s]
Only to be used if parameter 1-00 Configuration
Mode is set for Closed Loop and the integrated PI
controller is used for controlling the pressure.
Set the maximum time for which boost mode is
allowed. If the set time is exceeded, Sleep Mode
is entered, not waiting for the set boost pressure
to be reached.
22-50 End of Curve Function
Option: Function:
[0] Off End of Curve monitoring not active.
[1] Warning The frequency converter continues to run, but
activates an End of Curve warning [W94]. A
frequency converter digital output or a serial
communication bus can communicate a warning
to other equipment.
[2] Alarm The frequency converter stops running and
activates an End of Curve alarm [A 94]. A
frequency converter digital output or a serial
communication bus can communicate an alarm
to other equipment.
[3] Manual
Reset
Alarm
The frequency converter stops running and
activates an End of Curve alarm [A 94]. A
frequency converter digital output or a serial
communication bus can communicate an alarm
to other equipment.
NOTICE
Automatic restart resets the alarm and restarts the
system.
NOTICE
Do not set 14-20 Reset Mode, to [13] Infinite auto reset,
when parameter 22-50 End of Curve Function is set to [2]
Alarm. Doing so causes the frequency converter to
continuously cycle between running and stopping when
a End of Curve condition is detected.
NOTICE
If the frequency converter is equipped with a constant
speed bypass with an automatic bypass function that
starts the bypass if the frequency converter experiences
a persistent alarm condition, be sure to disable the
bypass’s automatic bypass function, if [2] Alarm or [3]
Man. Reset Alarm is selected as the End of Curve
Function.
22-51 End of Curve Delay
Range: Function:
10 s* [0 -
600 s]
When an End of Curve condition is detected, a
timer is activated. When the time set in this
parameter expires, and the End of Curve
condition has been steady in the entire period,
the function set in parameter 22-50 End of Curve
Function is activated. If the condition disappears
before the timer expires, the timer is reset.
How to programme the freque... VLT AQUA Drive FC 202 Operation Instructions
106 MG20P402 - Rev. 2013-12-16
55
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