Yaskawa G5HHP Drive - Manual (Page 299)

8.2 Programming Mode Constants
8 - 33
8.2.7 Protection Constants: L
J
Motor Overload: L1
C t t
Name
S tti F t
Change
Control Methods
Constant
Number Display
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
V/f
V/f
with
PG
Open
Loop
Vector
Flux
Vector
Page
L1-01
Motor protection
selection
Sets whether the motor overload
function is enabled or disabled at
electric thermal overload relay.
0: Disabled
1: Enabled
;
In some applications when the
Inverter power supply is turned
off, the thermal value is reset, so 0, 1 1 x B B B B 7 - 84 L1 01
MOL Fault Select
off, the thermal value is reset, so
even if this constant is set to 1,
(Enabled), protection may not be
effective.
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.
0, 1 1 x B B B B 7 - 84
L1-02
Motor protection time
constant
Sets the electric thermal detection
time in seconds units.
;
Usually setting is not necessary.
The factory setting is 150% over-
load for one minute.
0.1 to
5 0
1.0 x B B B B 7 - 84 L1 02
MOL Time Const
load for one minute.
When the motor’s overload re-
sistance is known, set at the
overload resistance when the
motor is hot started.
5.0
1.0 x B B B B 7 - 84
J
Power Loss Ridethrough: L2
C t t
Name
S tti F t
Change
Control Methods
Constant
Number Display
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
V/f
V/f
with
PG
Open
Loop
Vector
Flux
Vector
Page
L2-01
Momentary power
loss detection
0: Disabled (Undervoltage fault
detection)
1: Enabled (Restarted when the
power returns within the time
for L2-02. When L2-02 is ex-
ceeded, undervoltage fault
detection )
0 to 2 0 x B B B B 7 - 85 L2 01
PwrL Selection
detection.)
2: Enabled while CPU is operat-
ing. (Restarts when power re-
turns during control operations.
Does not detect undervoltage
fault.
0 to 2 0 x B B B B 7 - 85
L2-02
Momentary power
loss ridethru time
Sets the recovery time, when mo-
mentary power loss selection
(L2-01) is set to 1 in units of one
0.0 to
2 0
1.0
*1
x B B B B 7 - 85 L2 02
PwrL Ridethru t
(L2-01) is set to 1, in units of one
second.
2.0 *1
x B B B B 7 - 85
L2-03
Min. baseblock time
Sets the Inverter’s minimum base-
block time in units of one second,
when the Inverter is restarted after
power loss ridethrough.
;
Sets the time for the motor’s re- 0.0 to 10.0
x B B B B 7 87 L2-03
PwrL Baseblock t
; Sets the time for the motor s re-
sidual voltage to dissipate.
When an overcurrent occurs
when starting a speed search or
DC injection braking, increase
the set values.
0.0 to
25.5
10.0
*1
x B B B B 7 - 87
8