Mitsubishi Electric FR-A700 Technical Manual page 541

4.8 Positioning operation
Power
supply
High speed
Middle speed
"H" ON "M"ON
F or R is ON.
Operation pattern
*1 When the speed commands H, M and L are turned on simultaneously, the lower speed has precedence in operation.
[Example] When the speed commands H and L are turned ON simultaneously, the low speed command L is used in operation.
As do not have many input terminals, speed command can be input to only two terminals.
D700
*2 The 7.5K or less has a built-in discharging resistor designed for regenerative braking, but in the above diagram it was
A700
replaced by a high-duty brake resistor.
and a high duty brake resistor can be connected. (For the
not be used.)
*3 Also refer to the circuit example of the motor equipped with brake. (Refer to page 564)
*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 discharging resistor from overheat/burnout if the regenerative brake
transistor is damaged due to the thermal capacity shortage of the discharging resistor, and excessive regenerative brake duty,
etc.
*5 When the power supply is 400V class, install a step-down transformer.
*6 In this circuit, pressing the stop button stops the motor with the electromagnetic brake. For operation of the electromagnetic
brake after the motor is decelerated by the inverter, refer to page 576.
(common)
MCCB
T
*5
F
F
R
Forward
Stop rotation
LS
PB PB R
F
Reverse
rotation
LS
F
PB
R
High speed
Middle speed
Low speed
F
Low speed
Time
R
"L" ON
"LS"ON
F
A700 the 22K or less, and
575
common
BR
Inverter
MC
*4
R U
S V
T W
P
PX
B
PR
R
Ground
F
R
B
C
H
RH
*1
M
RM
*1
L
RL
*1
SD
STF
STR
SD
R
MRS
0.4K to 15K have a built-in brake transistor
E700 D700
F700 , an external discharging resistor for regenerative braking can
PRACTICAL CIRCUITS
Brake
B
Motor
IM
High-duty brake resistor
R
*
Note: When the brake resistor is
fitted to A700 the
externally, always remove the
link from across terminals
PX-PR to prevent the brake
transistor from being
4