Stop-On Contact Control Function - Mitsubishi Electric FR-A700 Instruction Manual

Parameter
6.13.4

Stop-on contact control function

(Pr. 6, Pr. 48, Pr. 270, Pr. 275, Pr. 276)
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.
Vibration
Fig. 6-107: Suppressing vibration in vertical motion applications
Pr.
Name
No.
Multi-speed setting
6
(low speed)
Stall prevention opera-
22
tion level
Second stall prevention
48
operation current
Stop-on contact control
270
selection
Stop-on contact excita-
275
tion current low-speed
multiplying factor
PWM carrier frequency at
276
stop-on contact
When Pr. 570 "Multiple rating setting ≠ "2", performing all parameter clear and inverter reset
changes the initial value and setting range. (Refer to section 6.7.5).
FR-A700 EC
Without stop-on-contact control
Initial Setting
Description
Value Range
Sets the output frequency for
10Hz 0 to 400Hz
stop-on-contact control.
Set the stall prevention opera-
150% 0 to 400%
tion level for stop-on-contact
control.
The smaller value set in either
150% 0 to 220%
Pr. 22 or Pr. 48 has a priority.
0 Normal operation
1 Stop-on-contact control
Load torque high speed
0 2 frequency control
(Refer to section 6.24.3)
Stop-on-contact+load torque
3 high speed frequency control
(Refer to section 6.24.3)
Set the force (holding torque)
for stop-on-contact control.
0 to 1000% Normally set 130% to 180%.
9999
Valid only during advanced
magnetic flux vector control.
9999 Without compensation
Set a PWM carrier frequency for
01800
stop-on-contact control.
or 0 to 9
less For real sensorless vector con-
trol, carrier frequency is always
2Hz when a setting value is 0 to
02160
9999
5 and always 6Hz when a setting
or 0 to 4
value is 6 to 9. (Valid at the fre-
more
quency of 3Hz or less.)
As set in Pr. 72 "PWM frequency
9999
selection".
Magnetic flux Magnetic flux Magnetic flux Sensorless Sensorless Sensorless
With stop-on-contact control
Complete stop
Lift
Parameters referred to
Motor brake and stop operation
Lift
4–6 Multi-speed setting
24–27
15 Jog frequency
22 Stall prevention ope-
ration level
48 Second stall preven-
tion operation cur-
rent
22 Torque limit level
59 Remote function
selection
72 PWM frequency
selection
79 Operation mode
selection
95 Online auto tuning
selection
128 PID action selection
178–189 Input terminal
function selection
270 2, 3 (load torque
high speed fre-
quency control)
I001567E
Refer to
Section
6.10.1
6.10.2
6.7.4
6.7.4
6.3.2
6.10.4
6.19.1
6.22.1
6.12.4
6.24.1
6.14.1
6.24.3
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