Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 86

How to programme the freque...
22-20 Low Power Auto Set-up
Start of auto set-up of power data for no-flow power tuning.
Option:
[0] Off
*
[1] Enabled An auto set-up sequence is activated, automat-
6 6
NOTICE
Auto set-up must be done when the system has reached
normal operating temperature!
NOTICE
It is important that the parameter 4-13 Motor Speed High
Limit [RPM] or 4-14 Motor Speed High Limit [Hz] is set to
the max. operational speed of the motor!
It is important to do the auto set-up before configuring
the integrated PI controller as settings are reset when
changing from closed to open loop in
parameter 1-00 Configuration Mode.
NOTICE
Carry out the tuning with the same settings in
1-03 Torque Characteristics, as for operation after the
tuning.
22-21 Low Power Detection
Option:
[0] Disabled
*
[1] Enabled The low-power detection commissioning must be
22-22 Low Speed Detection
Option:
[0] Disabled
*
[1] Enabled Detects when the motor operates with a speed
84
Operating Instructions
Function:
ically setting speed to approx. 50 and 85% of
rated motor speed (parameter 4-13 Motor Speed
High Limit [RPM], 4-14 Motor Speed High Limit [Hz]).
At those 2 speeds, the power consumption is
automatically measured and stored.
Before enabling auto set-up:
1. Close valve(s) to create a no-flow
condition
2. The frequency converter must be set for
open loop (parameter 1-00 Configuration
Mode).
Note that it is important also to set
1-03 Torque Characteristics.
Function:
carried out to set the parameters in parameter
group 22-3* No-Flow Power Tuning for proper
operation.
Function:
as set in parameter 4-11 Motor Speed Low Limit
[RPM] or 4-12 Motor Speed Low Limit [Hz].
Danfoss A/S © Rev. 06/2014 All rights reserved.
22-23 No-Flow Function
Common actions for low-power detection and low-speed
detection (Individual selections not possible).
Option: Function:
[0] Off
*
[1] Sleep Mode The frequency converter enters sleep mode
and stops when a no-flow condition is
detected. See parameter group 22-4* Sleep
Mode for programming options for sleep
mode.
[2] Warning The frequency converter continues to run,
but activates a no-flow warning [W92]. A
digital output or a serial communication bus
can communicate a warning to other
equipment.
[3] Trip The frequency converter stops running and
activates a no-flow alarm [A 92]. A frequency
converter digital output or a serial
communication bus can communicate an
alarm to other equipment.
[4] Stop and Trip
NOTICE
Do not set 14-20 Reset Mode, to [13] Infinite auto reset,
when parameter 22-23 No-Flow Function is set to [3]
Alarm. Doing so, causes the frequency converter to
continuously cycle between running and stopping when
a no-flow condition is detected.
NOTICE
Disable the bypass's automatic bypass funcion
•
if the frequency converter is equipped with a
constant speed bypass with an automatic
bypass function starting the bypass if the
frequency converter experiences a persistent
alarm condition, and
•
if [3] Alarm is selected as the no-flow function.
22-24 No-Flow Delay
Range: Function:
10 s [1 - 600 s] Set the time that low power/low speed must
*
stay detected to activate signal for actions. If
detection disappears before the timer runs
out, the timer is reset.
MG20Y202