Stop-On-Contact Control - Mitsubishi Electric 800 Series Instruction Manual

14.2

Stop-on-contact control

Magnetic flux Sensorless Magnetic flux Magnetic flux Sensorless Sensorless
To ensure accurate positioning at the upper limit, etc. of a lift, stop-on-contact control causes the mechanical brake to close
while the motor creates a holding torque to keep the load in contact with a mechanical stopper, etc.
This function suppresses vibration that is likely to occur when the load is stopped upon contact in lift applications, thereby
ensuring reliable and highly accurate positioning stop.
<Without stop-on-contact control>
Vibration
Pr.
6 Multi-speed setting (low
D303 speed)
22
Stall prevention operation level 150%
H500
48 Second stall prevention
H600 operation level
270 Stop-on-contact control
A200 selection
Stop-on contact excitation
275
current low-speed scaling
A205
factor
276 PWM carrier frequency at stop-
A206 on contact
 Connection and operation example
•Sink logic
Power
supply
Forward rotation command
High-speed operation command
Middle-speed operation command
Stop-on contact selection 0
Stop-on contact selection 1
∗ The input terminal used differs according to the Pr.180 to Pr.189 settings.
324
14. (A) Application Parameters
14.2 Stop-on-contact control
<With stop-on-contact control>
Complete stop
Lift
Name Initial value
10 Hz
9999
0
9999
9999
MCCB
R/L1
S/L2
T/L3
STF
RH∗
RM∗
RL∗
RT∗
SD
Lift
Setting
range
0 to 590 Hz Set the output frequency for stop-on-contact control.
0% to 400%
Set the stall prevention operation level for stop-on-contact control.
0% to 400%, The smaller value set in either Pr.22 or Pr.48 has priority.
9999
0 Normal operation
1 Stop-on-contact control
11 Stop-on-contact control (E.OLT is invalid)
Set the force (holding torque) for stop-on-contact control.
0% to 300%
Normally, set the scaling factor between 130% to 180%.
9999 Not compensated.
Set a PWM carrier frequency for stop-on-contact control.
For Real sensorless vector control, the carrier frequency is always
0 to 9 2 kHz when the setting value is "0 to 5" and always 6 kHz when
the setting value is "6 to 9". (Valid at the output frequency of 3 Hz
or less.)
9999 As set in Pr.72 PWM frequency selection.
MC
Mechanical
brake
U
V
Motor
W
Description
Stop-on contact
control mode
Normal mode
Pr.4
Pr.5
Pr.6
0
(a) (b) (c)
RH
ON
RM
OFF ON
RL OFF
∗
RT OFF
∗ 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
(a): Acceleration time(Pr.7)
(b): Deceleration time(Pr.8)
(c): Second deceleration time(Pr.44/Pr.45)
Time
ON
ON