-
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
Default value: [0] Off
Parameter type: Option
2-setup: All setups
Conversion index: -
Data type: u_int8
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:
[0] Off
This function is not active.
[1] Warning
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.
[2] Alarm
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.
[3] Man. Re-
set
Alarm
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
Default value: 10 s
Parameter type: Range
2-setup: All setups
Conversion index: 0
Data type: u_int16
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:
Min: 0 s
Max: 600 s
Default value: 10 s
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
Default value: [0] Off
Parameter type: Option
2-setup: All setups
Conversion index: -
Data type: u_int8
Change during operation: True
Select the action to be performed if the broken-belt condition is detected.
AU363928304090en-000101 / 130R0982 | 173
Danfoss A/S © 2021.07
Parameters
VLT® Flow Drive FC 111
Programming Guide
