22-50 End of Curve Function
Option: Function:
NOTICE
Automatic restart resets the alarm and
restarts the system.
NOTICE
Do not set parameter 14-20 Reset Mode,
to [13] Innite 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 an
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 automatic bypass
function, if [2] Alarm or [3] Man. Reset
Alarm is selected as the end-of-curve
function.
[0]
*
O End-of-curve monitoring is not active.
[1] Warning The frequency converter continues to run, but
activates an end-of-curve warning (warning 94,
End of curve). 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 an end-of-curve alarm (alarm 94, End of
curve). A frequency converter digital output or a
serial communication bus can communicate an
alarm to other equipment.
[3] Manual
Reset Trip
The frequency converter stops running and
activates an end-of-curve alarm (alarm 94, End of
curve). A frequency converter digital output or a
eldbus can communicate an alarm to other
equipment.
[4] Stop and
Trip
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 is steady during the entire period, the
function set in parameter 22-50 End of Curve
22-51 End of Curve Delay
Range: Function:
Function is activated. If the condition disappears
before the timer expires, the timer is reset.
3.19.6 22-6* Broken Belt Detection
The broken-belt detection can be used in both closed-loop
systems and open-loop systems for pumps and fans. If the
estimated motor torque is below the broken belt torque
value (parameter 22-61 Broken Belt Torque) and the
frequency converter output frequency is above or equal to
15 Hz, the broken-belt function (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:
NOTICE
Do not set parameter 14-20 Reset Mode
to [13] Innite 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
For frequency converters with constant-
speed bypass.
If an automatic bypass function starts
the bypass at persistent alarm
conditions, disable the bypass’s
automatic bypass function if [2] Alarm
or [3] Man. Reset Alarm is selected as
the broken-belt 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.
[3] Stop and
Trip
Parameter Description
VLT
®
AQUA Drive FC 202
186 Danfoss A/S © 05/2018 All rights reserved. MG20OB02
33
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