Second Stall Prevention (Pr. 48, Pr. 49) - Mitsubishi Electric FR-F500 Series Instruction Manual

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 Factory
Number Setting
48 120%
49 0
<Setting>
• Set the stall prevention operation level in Pr. 48.
• Refer to the following list to set values in Pr. 49.
Pr. 49 Setting
0
0.01Hz to 120Hz
9999
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.
Do not set a too small value to the second stall prevention operation current.
Otherwise, torque generated will decrease.
% % % % Refer to Pr. 42.
Pr. 50
Setting Range
0 to 150%
0 to 120Hz, 9999
Second stall prevention function is not activated.
Second stall prevention function is activated according to the
frequency as shown above.
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
CAUTION
87
PARAMETERS
Related parameters
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)
Acceleration
Pr.48 Deceleration/constant speed
Running frequency
Pr.49
Operation
4