Danfoss VLT FC 102 Programming Manual page 235

Parameter Descriptions
Alarm Auto Resets
Speed
Operation
Alarm
Bypass
Delay
Timer
P24-11
ON
Relay
"Bypass"
OFF
Illustration 3.72 Drive Bypass
The status can be read in the extended status word 2, bit
number 24.
24-10 Drive Bypass Function
Option: 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.
[0] Disabled
*
[1] Enabled If in normal operation, the
automatic frequency converter
bypass function is activated under
the following conditions:
[2] Enabled (Fire
M Only)
M0010001
Programming Guide
Auto Reset Disabled
On delay (P5-41)
•
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.
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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 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.
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 for example a
missing motor in multi-motor
applications.
[0] Off
*
[1] Warning
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