Operating instructions

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
par. 14-20 Reset Mode or if the Bypass Delay
Timer (par. 24-11 Drive Bypass Delay Time) 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 comple-
ted.
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
par. 24-10 Drive Bypass Function, the Bypass Delay
Timer begins to operate. If the frequency converter
has 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 par. 5-40 Function Relay. If a [Relay Delay]
has also been programmed in par. 5-41 On Delay,
Relay, [Relay] or par. 5-42 Off Delay, Relay, [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
par. 5-40 Function Relay, Function Relay. If a Relay
Delay has also been programmed in par. 5-41 On
Delay, Relay, On Delay, Relay or par. 5-42 Off Delay,
Relay, [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 detect-
ing e.g. a missing motor in multi-motor applica-
tions.
[0]
* Off
[1] Warning
24-91 Missing Motor Coefficient 1
Range: Function:
0.0000 * [-10.0000 - 10.0000 ]
24-92 Missing Motor Coefficient 2
Range: Function:
0.0000 * [-100.0000 - 100.0000 ]
24-93 Missing Motor Coefficient 3
Range: Function:
0.0000 * [-100.0000 - 100.0000 ]
24-94 Missing Motor Coefficient 4
Range: Function:
0.000 * [-500.000 - 500.000 ]
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CA.02 - VLT
®
is a registered Danfoss trademark 165
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