The end-of-curve function can only be used when operating with the built-in PID controller ([3] Process Closed Loop in parameter
1-00 Configuration Mode).
22-50 End of Curve Function
Change during operation: True
Select desired action if an end-of-curve operation is detected.
N O T I C E
For drives with constant speed bypass, if an automatic bypass function starts the bypass at persistent alarm conditions, disable
the automatic bypass function when [2] Alarm or [3] Man. Reset Alarm is selected for the end-of-curve function.
Table 404: Option:
This function is not active.
The drive continues to run, but activates a warning (warning 94, end of curve). A drive digital output or a serial
communication bus can communicate the warning to other equipment.
The drive stops running and activates an alarm (alarm 94, end of curve). A drive digital output or a serial commu-
nication bus can communicate the alarm to other equipment.
N O T I C E
When this option is selected, do not set parameter 14-20 Reset Mode to [13] Infinite auto reset. Doing so
causes the drive to continuously cycle between running and stopping when a dry pump condition is de-
tected.
The drive stops running and activates an alarm (warning 94, end of curve). A drive digital output or a serial com-
munication bus can communicate the alarm to other equipment. If this option is selected and the end-of-curve
condition is detected, the drive can only be reset manually.
22-51 End of Curve Delay
Change during operation: True
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 Function is activated. If the condition
disappears before the timer expires, the timer is reset.
Table 405: Range:
4.16.6 22-6* Broken Belt Detection
Parameters for setting up broken-belt detection. The function monitors the motor torque.
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 drive output frequency is
above or equal to 15 Hz, parameter 22-60 Broken Belt Function is performed.
22-60 Broken Belt Function
Change during operation: True
Select the action to be performed if the broken-belt condition is detected.
AU363928304090en-000101 / 130R0982 | 173Danfoss A/S © 2021.07
Parameters
VLT® Flow Drive FC 111
Programming Guide
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