179
PARAMETERS
4
<Setting>
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:
• Function switch-over when stop-on-contact control is selected
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 operation
•Programmed operation
•PU + external operation
•PID control function operation
•Remote setting function operation
•Orientation control function operation
•Jog operation
Parameter
Number
Name Setting Description
6
Multi-speed setting (low
speed)
0 to 400Hz
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.
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.
48
Second stall prevention
operation current
0 to 200% Set the stall prevention operation for stop-on-contact control.
275
Stop-on-contact excitation
current low-speed
multiplying factor
0 to 1000%
Usually set a value between 130% and 180%.
Set the force (holding torque) for stop-on-contact control.
9999 No compensation
276
Stop-on-contact PWM
carrier frequency
0 to 15
Set a PWM carrier frequency for stop-on-contact control.
(Valid at the frequency of 3Hz or less)
9999 Conforms to the Pr. 72 "PWM carrier frequency selection".
Operation Mode
(External)
Ordinary Operation Stop-on-Contact Control
Remarks
RL, RT terminals RL RT RL RT
Main function Either is OFF ON ON
Output frequency for a
stop-on-contact
Multi-speeds
0 to 5V, 0 to 10V
4 to 20mA
Pr. 6 "low-speed frequency"
Stall prevention operation
level
Pr. 22 (stall prevention
operation level)
Pr. 48 (second stall prevention operation
current)
When RL and RT are on,
Pr. 49 (second stall prevention
operation frequency) is invalid.
Excitation current low-
speed multiplying factor
The current is compensated for by the
multiplying factor (0 to 1000%) set in
Pr. 275 before RL and RT are switched
on.
Carrier frequency
Pr. 72 "PWM frequency
selection"
(0 to 15)
Pr. 276 (stop-on-contact PWM carrier
frequency)
(0 to 15, 9999)
High-response current limit Yes No
