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PARAMETERS
85
4.2.21 Second stall prevention (Pr. 48, Pr. 49)
Pr. 48 "second stall prevention operation current"
Pr. 49 "second stall prevention operation
frequency"
#
The stall prevention operation level can be changed within the range from 0Hz to the frequency set inPr. 49.
#
The stall prevention operation level can be changed by switching the external input signal on-off.
Parameter
Number
Factory
Setting
Setting Range
48 120% 0 to 150%
49 0 0 to 120Hz, 9999
Running frequency
Stall prevention
operation curren
t
Acceleration
Deceleration/constant speed
Pr.49
Pr.48
<Setting>
•
Set the stall prevention operation level in Pr. 48.
•
Refer to the following list to set values in Pr. 49.
Pr. 49 Setting Operation
0 Second stall prevention function is not activated.
0.01Hz to 120Hz
Second stall prevention function is activated according to the
frequency as shown above.
9999
Second stall prevention function is activated according to the RT signal.
RT signal ON............... Stall level Pr. 48
RT signal OFF............. Stall level Pr. 22
Note: 1. When Pr. 49 = "9999", setting "0" in Pr. 48 disables the stall prevention function when the RT
signal switches on. When Pr. 49
≠
"9999" and Pr. 48 = "0", the stall prevention operation level is
0% when the frequency is equal to or less than the value set in Pr. 49.
2. When the stall prevention operation level signal input function is selected (Pr. 22 = 9999), setting
"9999" in Pr. 49 changes the stall prevention operation level from the value of the stall prevention
operation level signal (terminal 1 input) to the value set in Pr. 48 when the RT signal switches on.
3. When the RT signal is on, the second functions such as second acceleration/deceleration time
are also selected.
4. When terminal assignment is changed using Pr. 180 to Pr. 186, the other functions may be
affected. Check the functions of the corresponding terminals before making setting.
CAUTION
Do not set a too small value to the second stall prevention operation current.
Otherwise, torque generated will decrease.
Pr. 50
%
%%
%
Refer to Pr. 42.
Pr. 22 "stall prevention operation level"
Pr. 23 "stall prevention operation level
compensation factor at double
speed"
Pr. 66 "stall prevention operation level
reduction starting frequency"
Pr. 154 "voltage reduction selection
during stall prevention operation"
Pr. 180 to Pr. 186
(input terminal function selection)
Related parameters
4