5. Parameters
5-67
• When the motor is used in the high-speed range, the acceleration stall
prevention level is automatically lowered to provide smoother
acceleration.
• P2.03 limits how much the acceleration stall prevention level is lowered
so that it isn’t lowered any more than necessary.
5.8.3.4 Stall prevention at stop : P2.04
Parameter
No.
Name
Unit
Setting
range
Factory
Setting
Changeable
during
operation
P2.04
Stall Prevention
at Stop
- 0~1 1
X
• P2.04 can be used to set the stall prevention selection during stop.
• Setting
Setting
constant
Function
0
Disabled (when braking device is used)
1
Enabled (when braking device is not used)
• When setting1 is selected, the deceleration time is extended automatically
so that a main circuit over voltage fault doesn’t occur.
• Braking device used :
- braking resistor unit (for 400V class only)
- braking unit
• When braking device is NOT used, deceleration time should be long
enough to prevent the over voltage.
Figure 5.27 Deceleration stall prevention function : P2.04=1
Output Frequency
Deceleration Time
Setting
The deceleration time is
controlled to prevent over voltage
Time
5-68
MOSCON-E7 User’s Manual
5.8.3.5 Stall prevention when the motor is running : P2.05
Parameter
No.
Name
Unit
Setting
range
Factory
Setting
Changeable
during
operation
P2.05
Stall Prevention
in Running
- 0~2 1
X
• P2.05 can be used to set the stall prevention function during running.
• Setting
Setting
constant
Function
0
Disabled
(run according to the setting. Stalls may occur with excessive loads)
1
Enabled
(use deceleration time in F2.02 for stall prevention function)
2
Enabled
(use deceleration time in F2.04 for stall prevention function)
• When setting 1 is selected, deceleration is started if the phase current
continues to be higher than the stall prevention level for more than
100ms. The motor is accelerated back to the reference frequency again
when the current falls below this level.
5.8.3.6 Stall prevention when the motor is running at the
desired frequency : P2.06
Parameter
No.
Name
Unit
Setting
range
Factory
Setting
Changeable
during
operation
P2.06
Stall Prevention
Level in Running
1% 0~200
170
O
• P2.06 can be used to set the stall prevention level during running
• This setting is valid when P2.05 =1 or 2
• Normally it isn’t necessary to change this setting.
• Decrease this setting when:
- The motor capacity is small compared to the inverter capacity
- Stall occurs when the motor is operated with the factory setting
• Set this value as a percentage of the inverter’ s rated current
(i.e. 100% corresponds to the inverter’s rated current)
