Omron SYSDRIVE 3G3RV, User Manual

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6
-42
n
Setting Precautions
• When
the torque limit function is operating, control and compensation of the motor speed is disabled
because
torque control is given priority.
• When
using the torque limit to raise and lower loads, do not carelessly lower the torque limit value, as this
may
result in the motor falling or slipping.
• Torque
limits using an analog input are the upper limit value (during 10 V or 20 mA input) of 100% of the
motor
rated torque. To make the torque limit value during 10 V or 20 mA input 150% of the rated torque,
set
the input terminal gain to 150.0 (%). Adjust the gain for multi-function analog input terminal A2 using
H3-10.
•
The
torque limit accuracy is ±5% at the output frequency of 10 Hz or above. When output frequency is less
than
10 Hz, accuracy is lowered.
K K K K
Preventing Motor Stalling During Operation
Stall
prevention during operation prevents the motor from stalling by automatically lowering the Inverter's
output
frequency when a transient overload occurs while the motor is operating at a constant speed.
Stall
prevention during operation is enabled only during V/f control. If the Inverter output current continues to
exceed
the setting in parameter L3-06 for 100 ms or longer, the motor speed is reduced. Set whether to enable
or
disable deceleration time using parameter L3-05. Set the deceleration time using C1-02 (Acceleration time
1)
or C1-04 (Acceleration Time 2).
If
the Inverter output current reaches the set value in L3-06 - 2% (Inverter Rated Output Current), the motor
will
accelerate again at the frequency set or the acceleration time set.
n
Related Parameters
* The
initial value when C6-01 is set to 1 is given. If C6-01 is set to 0, the initial value will be 150%.
Param-
eter
Num-
ber
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f
with
PG
Open
Loop
Vec-
tor
LCD Display
L3-05
Stall
prevention selection
during
running function
selection
0:
Disabled (Operates according to the setting.
Motor
may stall when the load is large.)
1:
Enabled--Deceleration time 1 (Stall prevention
function
during operation deceleration time is
set
in C1-02.)
2:
Enabled--Deceleration time 2 (Stall prevention
function
during operation deceleration time is
set
in C1-04.)
0
to 2
1 No A A No
StallP
Run Sel
L3-06
Stall
prevention level dur-
ing
running
Enabled
when L3-05 is set to 1 or 2. Set as a per-
cent,
taking Inverter rated current to be 100%.
Normally,
there is no need to make this setting.
Lower
the set value if the motor stalls at the fac-
tory
setting.
30
to 200
120%
*
No A A No
StallP
Run Level