Note: 1. By increasing the Pr. 275 setting, the low-speed (stop-on-contact) torque increases, but the
overcurrent alarm (E.OCT) may occur or the machine may oscillate in a stop-on-contact state.
2. The stop-on-contact function is different from the servo lock function, and if used to stop or hold a
load for an extended period, the function can cause the motor to overheat. After a stop,
immediately reset this function and use a mechanical brake to hold the load.
3. Under the following operating conditions, the stop-on-contact function is made invalid:
•PU + external operation
•PID control function operation
•Remote setting function operation
•Orientation control function operation
1) Select advanced magnetic flux vector control and set "1" or "3" in Pr. 270.
2) Refer to the following list and set the parameters:
Multi-speed setting (low
Second stall prevention
• Function switch-over when stop-on-contact control is selected
RL, RT terminals
Output frequency for a
0 to 5V, 0 to 10V
4 to 20mA
Stall prevention operation
Pr. 22 (stall prevention
Excitation current low-
speed multiplying factor
Pr. 72 "PWM frequency
(0 to 15)
High-response current limit
Set the output frequency for stop-on-contact control.
The frequency should be as low as possible (about 2Hz). If it is set to
more than 30Hz, the operating frequency will be 30Hz.
0 to 400Hz
When stop-on-contact control is to be exercised during encoder
feedback control, encoder feedback control is made invalid when the
inverter enters the stop-on-contact control mode.
0 to 200%
Set the stall prevention operation for stop-on-contact control.
Usually set a value between 130% and 180%.
0 to 1000%
Set the force (holding torque) for stop-on-contact control.
Set a PWM carrier frequency for stop-on-contact control.
0 to 15
(Valid at the frequency of 3Hz or less)
Conforms to the Pr. 72 "PWM carrier frequency selection".
Either is OFF
Pr. 6 "low-speed frequency"
Pr. 48 (second stall prevention operation
The current is compensated for by the
multiplying factor (0 to 1000%) set in
Pr. 275 before RL and RT are switched
Pr. 276 (stop-on-contact PWM carrier
(0 to 15, 9999)
When RL and RT are on,
Pr. 49 (second stall prevention
operation frequency) is invalid.