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PARAMETERS
73
<Setting>
!
In Pr. 22, set the stall prevention operation level. Normally set it to 150% (factory
setting). Set "0" in Pr. 22 to disable the stall prevention operation.
!
To reduce the stall prevention operation level in the high-frequency range, set the
reduction starting frequency in Pr. 66 and the reduction ratio compensation factor in
Pr. 23.
Calculation expression for stall prevention operation level
Stall prevention operation level (%) = A + B
×
[
Pr. 22–A
Pr. 22–B
]
×
[
Pr. 23–100
100
]
where, A =
Pr. 66 (Hz)
×
Pr. 22 (%)
output frequency (Hz)
, B =
Pr. 66 (Hz)
×
Pr. 22 (%)
400Hz
!
By setting "9999" (factory setting) in Pr. 23, the stall prevention operation level is
constant at the Pr. 22 setting up to 400Hz.
Note: When the fast-response current limit has been set in Pr. 156 (factory setting
has the current limit activated), do not set the Pr. 22 value to 170% or more.
Torque will not be developed by doing so.
CAUTION
Do not set a small value as the stall prevention operation current.
Otherwise, torque generated will reduce.
Test operation must be performed.
Stall prevention operation during acceleration may increase the
acceleration time.
Stall prevention operation during constant speed may change the speed
suddenly.
Stall prevention operation during deceleration may increase the
deceleration time, increasing the deceleration distance.
Pr. 24 to Pr. 27
&
&&
&
Refer to Pr. 4 to Pr. 6.