130BA546.10
Operation
Alarm
Relay
"Bypass"
On delay (P5-41)
Speed
ON
OFF
Auto Resets
Auto Reset Disabled
Bypass
Delay
Timer
P24-11
Alarm
Status can be read in the Extended Status Word 2, bit number 24.
24-10 Drive Bypass Function
Option:
Function:
This parameter determines, what circumstances
will activate the Drive Bypass Function:
[0]
*
Disabled
[1]
Enabled
If in normal operation the automatic Drive
Bypass Function will be activated at following
conditions:
At a Trip Lock or a Trip. After the programmed
number of reset attempts, programmed in
or if the Bypass Delay Timer
) expires before
reset attempts have been completed
When in Fire Mode, the Bypass Function will
operate under following conditions:
When experiencing a trip at critical alarms, a
Coast or if the Bypass Delay Timer expires before
reset attempts have completed when [2]
Enabled in Fire Mode. The Bypass Function will
operate at trip at critical alarms, Coast or if the
Bypass Delay Timer expires before reset attempts
have been completed.
[2]
Enabled
(Fire M
Only)
The Bypass Function will operate at Trip at
Critical Alarms, Coast or Bypass Delay Timer if the
timer expires before reset attempts have
completed.
Important! After enabling the Drive Bypass Function, the Safe
Stop function (in versions, where included) is not complying
with standard EN 954-1, Cat. 3 installations anymore.
24-11 Drive Bypass Delay Time
Range:
Function:
0 s
*
[0 -
600 s]
Programmable in 1 s increments. Once the Bypass
Function is activated in accordance with the setting
in
, the Bypass Delay Timer
begins to operate. If the frequency converter has
24-11 Drive Bypass Delay Time
Range:
Function:
been set for a number of restart attempts, the timer
will continue to run while the frequency converter
tries to restart. Should the motor have restarted
within the time period of the Bypass Delay Timer,
then the timer is reset.
Should the motor fail to restart at the end of the
Bypass Delay Time, the Drive Bypass relay will be
activated, which will have been programmed for
Bypass in
. If a [Relay Delay] has
also been programmed in
[Relay] or
, [Relay], then this time
must also elapse before the relay action is performed.
Where no restart attempts are programmed, the
timer will run for the delay period set in this
parameter and will then activate the Drive Bypass
relay, which will have been programmed for Bypass
in
, Function Relay. If a Relay Delay
has also been programmed in
,
On Delay, Relay or
, [Relay], then
this time must also elapse before the relay action is
performed.
24-90 Missing Motor Function
Option:
Function:
Select the action to be taken if the motor current is
below the limit calculated as a function of the
output frequency. The function is used for
detecting e.g. a missing motor in multi-motor
applications.
[0]
*
Off
[1]
Warning
24-91 Missing Motor Coefficient 1
Range:
Function:
0.0000
*
[-10.0000 - 10.0000 ]
Parameter Description
VLT
®
HVAC Drive Programming Guide
166
MG.11.CB.02 - VLT
®
is a registered Danfoss trademark
3
3
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