22-50 End of Curve Function
Option:
Function:
NOTICE
Automatic restart resets the alarm and
restarts the system.
NOTICE
Do not set
, 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 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 bypass’s automatic
bypass function, if
[2] Alarm
or
[3] Man.
Reset Alarm
is selected as the end-of-
curve function.
[0]
*
Off
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]
Alarm
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]
Man.
Reset
Alarm
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.
[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 has been steady during the entire
period, the function set in
is activated. If the condition
22-51 End of Curve Delay
Range:
Function:
disappears before the timer expires, the timer is
reset.
3.20.5 22-6* Broken Belt Detection
The broken belt detection can be used in both closed and
open loop systems for pumps, fans, and compressors. 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 (
) 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
to
[13] Infinite 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]
*
Off
[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.
22-61 Broken Belt Torque
Range:
Function:
10 %
*
[0 - 100 %] Sets the broken-belt torque as a percentage
of the rated motor torque.
Parameter Descriptions
VLT
®
HVAC Drive FC 102
168
Danfoss A/S © 03/2015 All rights reserved.
MG11CE02
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