6-109
Overtorque Detection Timing Chart
Motor current
(Output torque)
Overtorque Detection 1 (N.O.)
or Overtorque Detection 2 (N.O.)
L6-02 or L6-05
L6-03
or
L6-06
L6-03
or
L6-06
See note. See note.
Note The
overtorque detection is cleared when the current drops about 5% of the Inverter
’
s rated cur
-
rent (or the motor’s rated torque).
H Hardware Protection Settings (L8)
Parameter Display name Setting Units Default
Valid access levels
number
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
L8-01 DB Resistor Prot 0 or 1 --- 0 Basic or Advanced
Note This parameter cannot be changed during operation.
Setting Function
0 Disabled. (Select 0 when a braking resistor isn’t being used or a Braking Resistor Unit is being
used.)
1 Enabled. (Protects the braking resistor from overheating.)
Parameter Display name Setting Units Default
Valid access levels
number
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
L8-02 OH Pre-Alarm Lvl 50 to 130 °C 100 Advanced
L8-03 OH Pre-Alarm Sel 0 to 3 --- 3 Advanced
Note These parameters cannot be changed during operation.
• Parameter
L8-02 specifies the detection temperature in
S
C for the Inverter overheat (OH) pre-alarm
function. An overheat pre-alarm occurs when the temperature of the cooling fins reaches this level.
• Parameter
L8-03 specifies the processing that will be performed
when an overheat pre-alarm occurs.
Setting Name Function
0 Ramp to Stop Decelerates to a stop in the deceleration time set in C1-09. (Fault)
1 Coast to Stop Coasts to a stop. (Fault)
2 Fast-Stop Emergency stop in the fast-stop time set in C1-09. (Fault)
3 Alarm Only Continues operation. (Monitor display only.) (Minor fault)
Parameter Display name Setting Units Default
Valid access levels
number
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
L8-05 Ph Loss In Sel 0 or 1 --- 0 Advanced
Note This parameter cannot be changed during operation.
Advanced Operation Chapter
6
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