Mitsubishi Electric FR-A700 Technical Manual page 550

4.16 Operation using stop-on-contact control
function
MCCB
Power
supply
Frequency
[Pr. 4]
[Pr. 5]
[Pr. 6]
0
RH
RM
RL
RT
Switched to stop-on-contact control mode when both RL and RT turn ON.
(RL and RT may be turned ON in any sequence and with any delay between them.)
*1 If the setting of the excitation current low-speed multiplying factor at stop-on-contact is too large, an overcurrent (OCT) alarm is liable to
occur.
*2 If the setting of the excitation current low speed multiplying factor is too large, the machine may oscillate in a stop-on-contact state.
*3 Unlike the servo lock function, the stop-on-contact function cannot hold the load for a long time. Stop-on-contact operation continued for
long time can cause the motor to overheat. After a stop, therefore, immediately use the mechanical brake to hold the load.
*4 When an inverter with a regenerative brake resistor is used for cyclic or heavy duty operation, it is recommended to install a magnetic
contactor in the primary side to prevent the brake discharge resistor from overheat/burnout if the regenerative brake transistor is
damaged due to the thermal capacity shortage of the discharge resistor, and excessive regenerative brake duty, etc.
*5 When the power supply is 400V class, install a step-down transformer.
A700 E700
(A700, E700)
T
*5
F
LSRT
Stop Up
LS
PB
PB
BR
F
Down
LS
PB
R BR
Maximum deceleration limit LS1
Maximum deceleration limit LS2
LS1 LS2
Stop-on-contact control mode
Normal mode
[Pr. 44]
([Pr. 45])
ON
ON
ON
BR
MC
*4
R
S
T
F
B
B
R
R
R
F C
F
R
L
S
1
L
S
2
LSRT
*3
F
STF
R
STR
H
RH
L
RM
LS1
RL
LS2
RT
BR
Time
MRS
SD
Related parameters
Multi-speed setting (low speed)
Stop-on contact excitation current low-speed
multiplying factor
PWM carrier frequency at stop-on contact
Stop-on contact/load torque high-speed frequency
control selection
Second acceleration/deceleration time
Second deceleration time
584
PRACTICAL CIRCUITS
Brake
B
Inverter
U
V IM
W
BU
Discharge
brake unit
resistor
P PR
P
N N
Earth (Ground)
Motor
[Pr. 6]
[Pr. 275]
[Pr. 276]
[Pr. 270]
[Pr. 44]
[Pr. 45]