Danfoss VLT AQUA Drive FC 200 Programming Manual page 165

Parameter Description
3.21 Parameters 24-** Application
Functions 2
Parameter group for application monitoring functions.
3.21.1 24-1* Drive Bypass
3 3
Function for activation of external contactors to bypass the
frequency converter for direct on-line operation of the
motor, in case of trip.
24-10 Drive Bypass Function
Option:
[0] Disabled
*
[1] Enabled If in normal operation, the automatic Drive
CAUTION
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:
0 s [0 - Programmable in 1 s increments. Once the Bypass
*
600 s] Function is activated in accordance with the setting
in 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
164
Function:
This parameter determines, what circumstances
will activate the Drive Bypass Function:
Bypass Function is activated at following
conditions:
At a Trip Lock or a Trip. After the programmed
number of reset attempts, programmed in
14-20 Reset Mode or if the Bypass Delay Timer
(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.
Function:
MG20O602 - VLT
®
VLT AQUA Drive Programming Guide
24-11 Drive Bypass Delay Time
Range:
®
is a registered Danfoss trademark
Function:
Bypass in 5-40 Function Relay. If a [Relay Delay] has
also been programmed in 5-41 On Delay, Relay,
[Relay] or 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 5-40 Function Relay, Function Relay. If a Relay
Delay has also been programmed in 5-41 On Delay,
Relay, On Delay, Relay or 5-42 Off Delay, Relay,
[Relay], then this time must also elapse before the
relay action is performed.