Danfoss VLT AutomationDrive FC 301 Programming Manual page 86

Parameter Descriptions
4-57 Warning Feedback High
Range:
999999.999
ReferenceFeed-
backUnit
*
3 3
4-58 Missing Motor Phase Function
Option:
[0] Disabled
*
[1] Trip 100
ms
[2] Trip 1000
ms
4-59 Motor Check At Start
Option: Function:
NOTICE
This parameter cannot be adjusted while the
motor is running.
NOTICE
Valid for FC 302 only.
Use this parameter to detect the missing motor phase
during motor standstill. Shows alarm 30, Motor phase U
missing, alarm 31, Motor phase V missing, or alarm 32,
Motor phase W missing in the event of a missing motor
phase during standstill. Use this function before
disengaging a mechanical brake. Enable this function
to avoid motor damage.
See also chapter 3.5.5 Combinations of parameters 4-58
and 4-59.
84
VLT
Function:
[par. 4-56 - Enter the upper feedback
999999.999 limit. When the feedback
ReferenceFeed- exceeds this limit, the
backUnit] display reads Feedb
The signal outputs can be
programmed to produce
a status signal on
terminal 27 or 29 (FC 302
only) and on relay output
01 or 02 (FC 302 only).
Function:
NOTICE
This parameter cannot be adjusted while
the motor is running.
The missing motor phase function detects
whether the motor phase is missing during
motor rotation. Shows alarm 30, 31, or 32 in
the event of a missing motor phase. Enable
this function to avoid motor damage.
See also chapter 3.5.5 Combinations of
parameters 4-58 and 4-59.
The frequency converter does not issue a
missing motor phase alarm. Not recommended
due to risk of motor damage.
For a quick detection time and alarm in the
event of a missing motor phase.
Danfoss A/S © 01/2018 All rights reserved.
®
AutomationDrive FC 301/302
4-59 Motor Check At Start
Option: Function:
[0] Off
*
RISK OF MOTOR DAMAGE
Using this option may lead to motor damage.
.
High
The frequency converter does not issue a missing
motor phase alarm.
[1] On Before each start, the frequency converter checks if all
3 motor phases are present. The check is performed
without any movement on ASM motors. For PM and
SynRM motors, the check is performed as part of the
position detection.
When parameter 4-59 Motor Check At Start is set to [1] On,
do not set parameter 4-58 Missing Motor Phase Function to
the following options:
•
[0] Disabled.
•
[5] Motor check.
3.5.5 4-6* Speed Bypass
Some systems require that certain output frequencies or
speeds are avoided due to resonance problems in the
system. A maximum of 4 frequency or speed ranges can
be avoided.
4-60 Bypass Speed From [RPM]
Array [4]
Range:
0 RPM [0 - par. 4-13
*
RPM]
4-61 Bypass Speed From [Hz]
Array [4]
Range:
Size related
*
4-62 Bypass Speed To [RPM]
Array [4]
Range:
0 RPM [0 - par. 4-13
*
RPM]
CAUTION
Function:
Some systems call for avoiding certain
output speeds due to resonance
problems in the system. Enter the
lower limits of the speeds to be
avoided.
Function:
[ 0 - par. Some systems require that certain
4-14 Hz] output frequencies or speeds are
avoided due to resonance problems
in the system. Enter the lower limits
of the speeds to be avoided.
Function:
Some systems call for avoiding certain
output speeds due to resonance
problems in the system. Enter the
MG33MO02