Mitsubishi Electric 800 Series, Instruction Manual, Page: 465 / 727

(A) Application parameters
464
PARAMETERS
 Setting the stop-on-contact control
• Make sure that the inverter is in External or Network operation mode. (Refer to page 291 .)
• Select either Real sensorless vector control (speed control) or Advanced magnetic flux vector control.
• Set "1, 3, 11 or 13" in
Pr.270 Stop-on contact/load torque high-speed frequency control selection .
• Set the output frequency for stop-on-contact control in Pr.6 Multi-speed setting (low speed) .
Set the frequency as low as possible (about 2 Hz). If a frequency higher than 30 Hz is set, it operates with 30 Hz.
• When both the RT and RL signals are switched ON, the inverter enters the stop-on-contact control, and operation is
performed at the frequency set in Pr.6 independently of the preceding speed.
• Setting Pr.270 = "11 or 13" disables stall prevention stop (E.OLT) during stop-on-contact control (with both RL and RT
signals ON).
NOTE
• By increasing the Pr.275 setting, the low-speed (stop-on-contact) torque increases, but overcurrent fault (E.OC[]) may occur
or the machine may oscillate in stop-on-contact status.
• 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, this function can cause the motor to overheat.
After a stop, immediately switch to a mechanical brake to hold the load.
• Under the following operating conditions, the stop-on-contact function is invalid:
PU operation (Pr.79) , JOG operation (JOG signal), PU + External operation (Pr.79) , PID control function operation (Pr.128) ,
Remote setting function operation (Pr.59) , Automatic acceleration/deceleration (Pr.292) , Start time tuning, Orientation control
function operation
• When performing stop-on-contact control during encoder feedback control, encoder feedback control is invalid due to a
transition to the stop-on-contact control mode.
 Function switching of stop-on-contact control selection

When RL and RT are ON, Pr.49 Second stall prevention operation frequency is invalid.
Main functions
Normal operation
(either RL or RT is OFF or both are OFF)
Stop-on-contact control
(both RL and RT are ON)
Real sensorless
vector control
Advanced
magnetic flux
vector control
Real sensorless
vector control
Advanced
magnetic flux
vector control
Output frequency Multi-speed, 0 to 5 V, 0 to 10 V 4 to 20 mA, etc. Pr.6 setting
Stall prevention operation
level
— Pr.22 setting —
The smaller value set in
either
Pr.22 or Pr.48 .

Torque limit level Pr.22 setting — Pr.22 setting —
Excitation current low-
speed scaling factor
—
The current is compensated by Pr.275 (50 to
300%) setting from normal operation.
Carrier frequency Pr.72 setting
When output frequency is 3 Hz or lower,
Pr.276 setting ( Pr.72 when Pr.276 = "9999")
Fast-response current
limit
— Enabled — Disabled