Mitsubishi Electric FR-B-750 to 75K Instruction Manual page 85

Adjust the output torque of the motor (current)
(4) Set multiple stall prevention operation levels (Pr. 48, Pr. 49, Pr. 114, Pr. 115)
⋅ Setting "9999" in Pr. 49 Second stall prevention operation frequency and turning the RT signal on make Pr. 48 Second stall
prevention operation current valid.
⋅ In Pr. 48 (Pr. 114), you can set the stall prevention operation level at the output frequency from 0Hz to that set in Pr. 49
(Pr. 115).
During acceleration, however, the operation level is as set in Pr. 22.
⋅ This function can also be used for stop-on-contact or similar operation by decreasing the Pr. 48 (Pr. 114) setting to
weaken the deceleration torque (stopping torque).
⋅ Pr. 114 and Pr. 115 are made valid when the X9 signal is on. For the terminal used for X9 signal input, set "9" in any of
Pr. 178 to Pr. 189 input terminal function selection to assign the X9 signal function.
During acceleration
Pr.48
During deceleration/constant speed During deceleration/constant speed During deceleration/constant speed
Pr.114
Pr.49 Running frequency
Pr.115
Set frequency exceeds Pr. 49(Pr.115)
Set
frequency
Pr.49
(Pr.115)
Stall
prevention
level
REMARKS
⋅ When Pr. 49 ≠ "9999" (level changed according to frequency) and Pr. 48 = "0%", the stall prevention operation level is 0% at or
higher than the frequency set in Pr. 49.
⋅ In the initial setting, the RT signal is assigned to the RT terminal. By setting "3" to any of Pr. 178 to Pr. 189 (input terminal function
selection), you can assign the RT signal to the other terminal.
CAUTION
⋅ Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Please
make setting after confirming the function of each terminal.
⋅ The RT(X9) signal acts as the second (third) function selection signal and makes the other second (third) functions valid. (Refer
to page 122)
76
FR-B-22K or less
FR-B3
FR-B-30K or
more
*1 The smaller setting of the stall prevention operation levels set in Pr. 22 and Pr. 48 has a higher
priority.
*2 When Pr. 868 = "4" (Stall prevention operation level analog input), the stall prevention
operation level also switches from the analog input (terminal 1 input) to the stall prevention
operation level of Pr. 48 when the RT signal turns on.
(The second stall prevention operation level cannot be input in an analog form.)
Output
frequency (Hz)
Output
frequency
Pr. 22
used
Pr. 49 Pr. 115
Setting Setting
0 (initial value)
0.01Hz to 120Hz
0.01Hz to 60Hz
Setting
can not be
9999
*2
made.
Set frequency is Pr. 49 (Pr.115)or less
Output
frequency (Hz)
Pr.49
(Pr.115)
Set
frequency
Time
Pr. 22
Pr. 48
used
(Pr.114)
used
Operation
The second (third) stall prevention
operation is not performed.
The second (third) stall prevention
operation is performed according to the
frequency.
*1
The second (third) stall prevention function
is performed according to the RT signal.
RT signal ON ... Stall level Pr. 48
RT signal OFF ... Stall level Pr. 22
Output
frequency
Time
Pr. 48
(Pr.114)
used