Danfoss VLT HVAC Basic Drive FC 100 Series Programming Manual page 92

Parameters
3 3
Figure 3.16
Status can be read in the Extended Status Word 2, bit
number 24.
24-10 Drive Bypass Function
Option:
[0] Disabled
[2] Enabled (Fire
Mode only)
24-11 Drive Bypass Delay Time
Range: Function:
0 [0 - Programmable in 1 s increments. Once the Bypass
s 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 adjustable frequency
drive has been set for a number of restart attempts,
the timer will continue to run while the adjustable
frequency drive tries to restart. If the motor restarts
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 5-40 Function Relay.
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.
3-64
®
VLT HVAC Basic Drive Programming Guide
Function:
This parameter determines, what circum-
stances will activate the drive bypass
function:
The bypass function will operate at trip at
critical alarms, coast or bypass delay timer if
the timer expires before reset attempts
have completed.
MG18B222 - VLT
®
is a registered Danfoss trademark