7-44
7-2-7 Protection Parameter Lists
H Motor Overload: L1
Para
meter
Name
Description Set-
tin
dur-
ing
op-
era-
tion
V/f
con-
trol
V/f
with
PG
Open
loop
vec-
tor
Flux
vec-
tor
L1-01
Motor protection
selection
Sets whether the motor overload
function is enabled or disabled at
electric thermal overload relay
.
0: Disabled
1: Enabled
Note:
In some applications when the
Inverter power supply is turned
of
f, the thermal value is reset,
0, 1
1 NO B B B B 6-98
MOL Fault Select
so even if this parameter is set
to 1, (Enabled), protection may
not be ef
fective.
When several motors are con
-
nected to one Inverter, set to 0
(Disabled) and ensure that each
motor is installed with a protec
-
tion device.
L1-02
Motor protection
time constant
Sets the electric thermal detection
time in units of seconds.
Note: Usually setting is not necessary.
The default setting is 150%
overload for one minute.
0.1 to
5.0
1.0 NO B B B B 6-98
MOL T
ime Const
When the motor
’
s overload re
-
sistance is known, set at the
overload resistance when the
motor is hot started. (Always
leave a margin for error
.)
H Power Loss Ridethrough: L2
Para
Control
mode
Page
meter
No.
Display
name
range setting ges
during
opera-
tion
V/f
control
V/f
with
PG
Open
loop
vector
Flux
vector
L2-01
Momentary
power loss
selection
0:
Disabled (Undervoltage
fault detection)
1:
Enabled (Restarted when
the power returns within the
time for L2-02. When L2-02
is exceeded, undervoltage
0 to 2
0 NO B B B B 6-99
PwrL
Selection
fault detection.)
2:
Enabled while CPU is
operating. (Restarts when
power returns during control
operations. Does not detect
undervoltage fault.
L2-02
Momentary
power loss
ridethru
Sets the recovery time, when
momentary power loss selection
(L2-01) is set to 1, in units of
0.0 to
2.0
0.7
(See
note 1.)
NO B B B B 6-99
PwrL
Ridethru t
Parameter Lists Chapter
7
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