Programming and Parameters
3-33
Utility File
D
Y
NAMIC CONTR
O
L
P
o
wer
Loss
186
[Power Loss Level]
Sets the level at which the [Power Loss
Mode] selection will occur.
Default:
Min/Max:
Units:
Drive Rated Volts
0.0/999.9 VDC
0.1 VDC
187
[Load Loss Level]
Sets the percentage of motor nameplate
torque at which a load loss alarm will
occur.
Default:
Min/Max:
Units:
200.0%
0.0/800.0%
0.1%
188
[Load Loss Time]
Sets the time that current is below the
level set in [Load Loss Level] before a
fault occurs.
Default:
Min/Max:
Units:
0.0 Secs
0.0/300.0 Secs
0.1 Secs
189
[Shear Pin Time]
Sets the time that the drive is at or above
current limit before a fault occurs. Zero
disables this feature.
Default:
Min/Max:
Units:
0.0 Secs
0.0/30.0 Secs
0.1 Secs
Fi
le
Gr
ou
p
No.
Parameter Name & Description
See
page 3-2
for symbol descriptions
Values
Relate
d
The drive can use the percentages referenced in [Power Loss Mode] or a trigger
point can be set for line loss detection as follows:
V
trigger
= [DC Bus Memory] – [Power Loss Level]
A digital input (programmed to “29, Pwr Loss Lvl”) is used to toggle between
fixed percentages and the detection level.
!
ATTENTION:
Drive damage can occur if proper input impedance
is not provided as explained below.
If the value for [Power Loss Level] is greater than 18% of [DC Bus
Memory], the user must provide a minimum line impedance to limit
inrush current when the power line recovers. The input impedance
should be equal to or greater than the equivalent of a 5%
transformer with a VA rating 5 times the drives input VA rating.
Fi
le
Gr
ou
p
No.
Parameter Name & Description
See
for symbol descriptions
Values
Relate
d
UT
IL
IT
Y
Dir
ect
ion Conf
ig
190
[Direction Mode]
Selects method for changing direction.
Default:
Options:
0
0
1
2
“Unipolar”
“Unipolar”
“Bipolar”
“Reverse Dis”
thru
thru
Mode
Direction Change
Unipolar
Drive Logic
Bipolar
Sign of Reference
Reverse Dis
Not Changeable
Summary of Contents for Allen-Bradley PowerFlex 700 B Series
Page 10: ...P 6 Overview Notes ...
Page 36: ...1 26 Installation Wiring Notes ...
Page 118: ...3 78 Programming and Parameters Notes ...
Page 162: ...A 28 Supplemental Drive Information Notes ...
Page 227: ......