Danfoss vlt FC 102 Programming Guide

22-60 Broken Belt Function
Selects the action to be performed if the broken-belt condition is
detected.
Option: Function:
NOTICE
Do not set
parameter 14-20 Reset Mode to
[13] Innite 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] * O
[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.
22-62 Broken Belt Delay
Range: Function:
10 s [0 - 600 s] Sets the time for which the broken
belt conditions must be active
before carrying out the action
22-62 Broken Belt Delay
Range: Function:
selected in parameter 22-60 Broken
Belt Function.
3.20.6 22-7* Short Cycle Protection
When controlling refrigeration compressors, often there is 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.
This means that any normal stop command can be
overridden by the minimum run time function
(parameter 22-77 Minimum Run Time) and any normal start
command (start/jog/freeze) can be overridden by the
interval between starts function (parameter 22-76 Interval
between Starts).
None of the 2 functions are active if hand-on or o modes
have been activated via the LCP. If selecting hand-on or
o, the 2 timers are reset to 0, and do not start counting
until Auto is pressed and an active start command applied.
NOTICE
A coast command or missing run permissive signal
override both minimum run time and interval between
starts functions.
22-75 Short Cycle Protection
Option: Function:
[0] * Disabled Timer set in parameter 22-76 Interval
between Starts is disabled.
[1] Enabled Timer set in parameter 22-76 Interval
between Starts is enabled.
22-76 Interval between Starts
Range: Function:
Size
related*
[ par. 22-77 -
3600 s]
Sets the minimum time between 2
starts. Any normal start command
(start/jog/freeze) is disregarded until
the timer has expired.
Parameter Descriptions
VLT
®
HVAC Drive FC 102
208 Danfoss A/S © 10/2019 All rights reserved. M0010001
33

Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English