Danfoss VLT AQUA Drive FC 200 Programming Manual page 151

Parameter Description
output frequency is above or equal to 15 Hz, the broken
belt function (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
3 3
Option:
[0] Off
*
[1] Warning The frequency converter will continue to run, but
[2] Trip
NOTE
Do not set 14-20 Reset Mode, to [13] Infinite auto reset,
when 22-60 Broken Belt Function is set to [2] Trip. Doing so
will cause the frequency converter to continuously cycle
between running and stopping when a broken belt
condition is detected.
NOTE
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] Trip is selected as the
Broken Belt Function.
22-61 Broken Belt Torque
Range:
10 % [0 - 100 %] Sets the broken belt torque as a percentage
*
22-62 Broken Belt Delay
Range:
10 s [0 - 600 s] Sets the time for which the Broken Belt
3.19.7 22-7* Short Cycle Protection
In some applications, there is often a need for limiting the
numbers of starts. One way to do this is to ensure a
minimum run time (time between a start and a stop) and a
minimum interval between starts.
150
VLT
Function:
activate a Broken Belt Warning [W95]. A
frequency converter digital output or a serial
communication bus can communicate a warning
to other equipment.
The frequency converter will stop running and
activate a Broken Belt alarm [A 95]. A frequency
converter digital output or a serial communi-
cation bus can communicate an alarm to other
equipment.
Function:
of the rated motor torque.
Function:
conditions must be active before carrying out
the action selected in 22-60 Broken Belt
Function.
MG20O602 - VLT
®
AQUA Drive Programming Guide
This means that any normal stop command can be
overridden by 22-77 Minimum Run Time and any normal
start command (Start/Jog/Freeze) can be overridden by
22-76 Interval between Starts.
None of the two functions are active if Hand On or Off
modes have been activated via the LCP. If selecting Hand
On or Off, the two timers will be reset to 0, and not start
counting until [Auto On] is pressed and an active start
command applied.
22-75 Short Cycle Protection
Option:
[0] Disabled Timer set in 22-76 Interval between Starts is
*
[1] Enabled Timer set in 22-76 Interval between Starts is
22-76 Interval between Starts
Range:
Size related
*
22-77 Minimum Run Time
Range:
0 s [ 0 - par.
*
22-76 s]
NOTE
Does not work in cascade mode.
22-78 Minimum Run Time Override
Option:
[0]
[1]
22-79 Minimum Run Time Override Value
Range:
0.000 ProcessCtrlUnit
3.19.8 22-8* Flow Compensation
Sometimes it is not possible for a pressure transducer to
be placed at a remote point in the system and it can only
be located close to the fan/pump outlet. Flow compen-
®
is a registered Danfoss trademark
Function:
disabled.
enabled.
Function:
[ par. 22-77 Sets the time desired as minimum
- 3600 s] time between two starts. Any
normal start command (Start/Jog/
Freeze) will be disregarded until the
timer has expired.
Function:
Sets the time desired as minimum run time
after a normal start command (Start/Jog/
Freeze). Any normal stop command will be
disregarded until the set time has expired. The
timer will start counting following a normal
start command (Start/Jog/Freeze).
The timer will be overridden by a Coast
(Inverse) or an External Interlock command.
Function:
Disabled
Enabled
[-999999.999 - 999999.999
*
ProcessCtrlUnit]
Function: