Danfoss VLT AQUA Drive FC 202 Programming Manual page 208

Parameter Description
3.21.2 24-1* Drive Bypass
Function for activation of external contactors to bypass the
frequency converter for direct online operation of the
motor, if there is a trip.
3 3
24-10 Drive Bypass Function
Option:
[0] Disabled
*
[1] Enabled
[2] Enabled
(Emergency
M Only)
206
®
VLT
Function:
NOTICE
After enabling the frequency converter
bypass function, the Safe Torque Off
function (in versions, where included)
does not comply with standard EN
954-1, Cat. 3 installations.
This parameter determines the circumstances
that activate the frequency converter bypass
function.
If in normal operation, the automatic
frequency converter bypass function is
activated under the following conditions:
•
If there is a trip lock or a trip.
•
After the programmed number of
reset attempts programmed in
parameter 14-20 Reset Mode.
•
If the bypass delay timer
(parameter 24-11 Drive Bypass Delay
Time) expires before reset attempts
have been completed.
Danfoss A/S © 05/2018 All rights reserved.
AQUA Drive FC 202
24-11 Drive Bypass Delay Time
Range:
0 s [0 -
*
600 s]
Function:
Programmable in 1 s increments. Once the bypass
function is activated in accordance with the setting
in parameter 24-10 Drive Bypass Function, the
bypass delay timer begins to operate. If the
frequency converter has been set for several restart
attempts, the timer continues to run while the
frequency converter tries to restart. Should the
motor have restarted within the time period of the
bypass delay timer, the timer is reset.
Should the motor fail to restart at the end of the
bypass delay time, the frequency converter bypass
relay is activated, which has been programmed for
bypass in parameter 5-40 Function Relay. If a relay
delay has also been programmed in
parameter 5-41 On Delay, Relay, [Relay] or
parameter 5-42 Off Delay, Relay, [Relay], this time
must also elapse before the relay action is
performed.
Where no restart attempts are programmed, the
timer runs for the delay period set in this
parameter and activates the frequency converter
bypass relay, which has been programmed for
bypass in parameter 5-40 Function Relay. If a relay
delay has also been programmed in
parameter 5-41 On Delay, Relay or
parameter 5-42 Off Delay, Relay, [Relay], this time
must also elapse before the relay action is
performed.
MG20OB02