FC101 Programming Guide

22-45 Setpoint Boost
Range: Function:
0 %
*
[-100
-
100 %]
Only to be used if parameter 1-00 Conguration
Mode is set for closed loop and the integrated PI
controller is used. In systems with for example
constant pressure control, it is advantageous to
increase the system pressure before the motor is
stopped. This increase extends the time the motor
is stopped and helps to avoid frequent start/stop.
Set the required overpressure/overtemperature in
percentage of setpoint for the pressure (P
set
)/
temperature before entering the sleep mode.
If setting for 5%, the boost pressure is P
set
x1.05.
The negative values can be used for 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 Conguration
Mode is set for [3] 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, the frequency
converter enters the sleep mode without waiting
for the set boost pressure to be reached.
22-47 Sleep Speed [Hz]
Range: Function:
0* [ 0 - 400.0 ] Set the speed below which the frequency
converter goes into sleep mode.
22-48 Sleep Delay Time
Range: Function:
0 s [0 - 3600 s] Set the delay time that the motor waits before
entering sleep mode when the condition to
enter sleep mode is met.
22-49 Wake-Up Delay Time
Range: Function:
0 s [0 - 3600 s] Set the delay time that the motor waits before
waking up from sleep mode when the
condition for wake-up is met.
3.15.5 22-6* Broken-belt Detection
Use broken-belt detection in both closed-loop systems and
open-loop systems for pumps and fans. If the estimated
motor torque (current) is below the broken-belt torque
(current) value (parameter 22-61 Broken Belt Torque), and
the frequency converter output frequency is above or
equal to 15 Hz, parameter 22-60 Broken Belt Function is
performed.
22-60 Broken Belt Function
Selects the action to be performed if the broken-belt condition is
detected.
Option: Function:
[0] * O
[1] Warning The frequency converter continues to run, but
activates a broken-belt warning, warning 95,
Broken Belt. A frequency converter digital output
or a serial communication bus can communicate
a warning to other equipment.
[2] Trip The frequency converter stops running and
activates a broken-belt alarm, alarm 95, Broken
Belt. A frequency converter digital output or a
serial communication bus can communicate an
alarm to other equipment.
NOTICE
Do not set parameter 14-20 Reset Mode to [13] Innite
auto reset, when parameter 22-60 Broken Belt Function is
set to [2] Trip. Doing so causes the frequency converter
to continuously cycle between running and stopping
when a broken-belt condition is detected.
NOTICE
If the automatic bypass function is enabled, the bypass
starts when the frequency converter experiences a
persistent alarm condition. In this case, disable the
automatic bypass function if [2] Trip is selected as the
broken-belt function.
22-61 Broken Belt Torque
Range: Function:
10 %* [5 - 100 %] Set the broken-belt torque as a percentage
of the rated motor torque.
22-62 Broken Belt Delay
Range: Function:
10 s* [0 - 600
s]
Sets the time for which the broken-belt
conditions must be active before carrying out
the action selected in parameter 22-60 Broken
Belt Function.
Parameters
VLT
®
HVAC Basic Drive FC 101
92 Danfoss A/S © 04/2018 All rights reserved. MG18B502
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