Mitsubishi FR-A740-00023-EC - Stop-On Contact Control Function (Pr. 6, Pr. 48, Pr. 270, Pr. 275, Pr. 276)

205
Motor brake and stop operation
4
PARAMETERS
4.14.4 Stop-on contact control function (Pr. 6, Pr. 48, Pr. 270, Pr. 275, Pr. 276)
* When Pr. 570 Multiple rating setting ≠ “2”, performing inverter reset and all parameter clear changes the initial value and setting range. (Refer to page
149 )
<Connection and operation example>
To ensure accurate positioning at the upper limit etc. of a
lift, stop-on-contact control causes a mechanical brake
to be closed while the motor is developing a holding
torque to keep the load in contact with a mechanical
stopper etc.
This function suppresses vibration which is liable to
occur when the load is stopped upon contact in vertical
motion applications, ensuring steady precise positioning.
Parameter
Number
Name
Initial
Value
Setting Range Description
6
Multi-speed setting
(low speed)
10Hz 0 to 400Hz Set the output frequency for stop-on-contact control.
22
Stall prevention
operation level
150% * 0 to 400%
Set the stall prevention operation level for stop-on-contact
control.
The smaller value set in either Pr. 22 or Pr. 48 has a priority.
48
Second stall
prevention
operation current
150%
* 0 to 220% *
270
Stop-on contact/
load torque high-
speed frequency
control selection
0
0 Normal operation
1 Stop-on-contact control
2
Load torque high speed frequency control (Refer to page
361)
3
Stop-on-contact+load torque high speed frequency control
(Refer to page 361)
275
Stop-on contact
excitation current
low-speed
multiplying factor
9999
0 to 1000%
Set the force (holding torque) for stop-on-contact control.
Normally set 130% to 180%.
Valid only during advanced magnetic flux vector control
9999 No compensation.
276
PWM carrier
frequency at stop-
on contact
9999
01800 or less 0 to 9 Set a PWM carrier frequency for stop-on-contact control.
For real sensorless vector control, carrier frequency is
always 2Hz when a setting value is 0 to 5 and always 6Hz
when a setting value is 6 to 9. (Valid at the frequency of
3Hz or less.)
02160 or more 0 to 4
9999 As set in Pr. 72 PWM frequency selection .
Magnetic flux
Magnetic flux
Magnetic flux
Sensorless
Sensorless
Sensorless
<Without stop-on-contact control>
V
ibration Complete stop
Lift Lift
<With stop-on-contact control
>
Power
supply
Forward rotation command
High-speed operation command
Middle-speed operation command
Stop-on contact selection 0
Stop-on contact selection 1
MCCB
R/L1
S/L2
T/L3
STF
RH *
RM *
RL *
RT *
U
V
W
MC
Mechanical
brake
Motor
* The input terminal used differs according to the Pr. 180 to Pr. 189 settings.
Sink logic
PC
(a) (b) (c)
Time
Pr. 4
RH
RM
RL
RT
Pr. 5
Pr. 6
Output frequency
0
Normal mode
Stop-on contact
control mode
(a):Acceleration time (Pr. 7 )
(b):Deceleration time (Pr. 8 )
(c):Second deceleration time (Pr. 44/Pr. 45 )
*
ONOFF
ONOFF
ONOFF
ON
Goes into stop-on-contact control mode when
both RL and RT switch on.
*RL and RT may be switched on in any order
with any time difference