AP-46 Maximum Boost Time
Range:
Function:
60
s
*
[0 -
600 s]
Only to be used if
is set to
[3] Process 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, sleep mode is
entered, not waiting for the set boost pressure to
be reached.
3.19.4 AP-5# End of Curve
The end-of-curve conditions occur when a pump is
yielding a too large volume to ensure the set pressure. This
situation can occur if there is a leakage in the distribution
pipe system after the pump causing the pump to operate
at the end of the pump characteristic, valid for the
maximum speed set in
parameter F-17 Motor Speed High
or
parameter F-15 Motor Speed High Limit [Hz]
If the feedback is 2.5% of the programmed value in
parameter CL-14 Maximum Reference/Feedb.
(or numerical
parameter CL-13 Minimum Reference/Feedb.
whichever is highest) below the setpoint for the required
pressure for a set time (
), and the pump runs with maximum speed set in
parameter F-17 Motor Speed High Limit [RPM]
or
parameter F-15 Motor Speed High Limit [Hz]
, the function
selected in
parameter AP-50 End of Curve Function
place.
It is possible to get a signal on 1 of the digital outputs by
selecting
[192] End of Curve
in parameter group
E-2# Digital
Outputs
and. The signal is present, when an end-of-curve
condition occurs and the selection in
is different from
[0] Off
. The end-of-curve
function can only be used when operating with the built-
in PID controller (
[3] Closed loop
parameter H-40 Configuration Mode
AP-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 AP-50 End of Curve Function
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.
AP-50 End of Curve Function
Option:
Function:
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]
*
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
fieldbus can communicate an alarm to other
equipment.
[4]
Stop and
Trip
AP-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
is activated. If the condition disappears
before the timer expires, the timer is reset.
AP-52 End of Curve Tolerance
Range:
Function:
2.5 %
*
[0.5 - 20.0 %]
3.19.5 AP-6# Broken Belt Detection
The broken-belt detection can be used in both closed-loop
and open-loop systems for pumps, fans, and compressors.
If the estimated motor torque is below the broken-belt
torque value (
parameter AP-61 Broken Belt Torque
), and the
frequency converter output frequency is above or equal to
Parameter Description
132
03/2016 All rights reserved.
DET-620D
3
3
