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VLT Automation VT Drive FC322
Programming Guide
2.19.6 22-6* Broken Belt Detection
The Broken Belt Detection can be used in both closed and open loop systems for pumps and fans. If the estimated motor torque is below the broken belt
torque value (par. 22-61) and the frequency converter output frequency is above or equal to 15 Hz, the broken belt function (par. 22-60) is performed
22-60 Broken Belt Function
Option:
[0] *
Off
[1]
Warning
[2]
Trip
22-61 Broken Belt Torque
Range:
10 %*
[0 - 100 %]
22-62 Broken Belt Delay
Range:
10 s
[0 - 600 s]
2.19.7 22-7* Short Cycle Protection
In some applications, there will often be 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
Jog/Freeze) can be overridden by the
None of the two functions are active if
to 0, and not start counting until
22-75 Short Cycle Protection
Option:
[0] *
Disabled
[1]
Enabled
22-76 Interval between Starts
Range:
Application
[Application dependant]
dependent*
22-77 Minimum Run Time
Range:
0 s*
[Application dependant]
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Function:
Selects the action to be performed if the Broken Belt condition is detected
Function:
Sets the broken belt torque as a percentage of the rated motor torque.
Function:
Sets the time for which the Broken Belt conditions must be active before carrying out the action
selected in par. 22-60
Minimum Run Time
Interval Between Starts
function (par. 22-76).
Hand On
Off
or
modes have been activated via the LCP. If selecting
Auto
is pressed and an active start command applied.
Function:
Timer set in par. 22-76
Timer set in par. 22-76
Function:
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.
MG.20.W1.22 - VLT is a registered Danfoss trademark
Broken Belt Function
.
function (par. 22-77) and any normal start command (Start/
Hand On
Interval between Starts
is disabled.
Interval between Starts
is enabled.
2 Parameter Description
Off
or
, the two timers will be reset
221
2
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