Danfoss FC322 Series, Instruction Manual, Page: 108 / 186

8.2.10 22-** Miscellaneous
This group contains parameters used for monitoring water/ wastewater applications.
22-20 Low Power Auto Set-up
Option: Function:
When set for Enabled , an auto set up sequence is activated, automatically setting speed to approx.
50 and 85% of rated motor speed (par. 4-13 Motor Speed High Limit [RPM] , par. 4-14 Motor Speed
High Limit [Hz] ). At those two speeds, the power consumption is automatically measured and stored.
Before enabling Auto Set Up:
1. Close valve(s) in order to create a no flow condition
2. The frequency converter must be set for Open Loop (par. 1-00
Configuration Mode
).
Note that it is important also to set par. 1-03
Torque Characteristics
.
[0] * Off
[1] Enabled
NB!
Auto Set Up must be done when the system has reached normal operating temperature!
NB!
It is important that the par. 4-13
Motor Speed High Limit [RPM]
or par. 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 Contoller as settings will be reset when changing from Closed
to Open Loop in par. 1-00
Configuration Mode
.
NB!
Carry out the tuning with the same settings in par. 1-03
Torque Characteristics
, as for operation after the tuning.
22-21 Low Power Detection
Option: Function:
[0] * Disabled
[1] Enabled If selecting Enabled, the Low Power Detection commissioning must be carried out in order to set
the parameters in group 22-3* for proper operation!
22-22 Low Speed Detection
Option: Function:
[0] * Disabled
[1] Enabled Select Enabled for detecting when the motor operates with a speed as set in par. 4-11 Motor Speed
Low Limit [RPM]
or par. 4-12 Motor Speed Low Limit [Hz] .
8 How to Programme the Frequency Converter
Automation VT Drive FC322
Instruction Manual
108
MG.20.U1.22
8