Mitsubishi Electric FR-E800, Instruction Manual

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15. (A) Application Parameters
15.2 Stop-on-contact control
15.2
Stop-on-contact control
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.
 Connection and operation example
Magnetic flux Magnetic flux Magnetic flux Sensorless Sensorless Sensorless
<Without stop-on-contact control>
Vibration Complete stop
Lift Lift
<With stop-on-contact control>
Pr. Name Initial value
Setting
range
Description
6
D303 Multi-speed setting (low
speed)
10 Hz 0 to 590 Hz Set the output frequency for stop-on-contact control.
22
H500
Stall prevention operation level 150% 0% to 400%
Set the stall prevention operation level for stop-on-contact control.
48
H600 Second stall prevention
operation level
9999
0% to 400%,
9999 The smaller value set in either Pr.22 or Pr.48 has priority.
270
A200 Stop-on-contact control
selection
0
0 Normal operation
1 Stop-on-contact control
11 Stop-on-contact control (E.OLT is invalid)
275
A205
Stop-on contact excitation
current low-speed scaling
factor
9999
0% to 300%
Set the force (holding torque) for stop-on-contact control.
Normally, set the scaling factor between 130% to 180%.
9999 Not compensated.
276
A206 PWM carrier frequency at stop-
on contact
9999
0 to 9
Set a PWM carrier frequency for stop-on-contact control.
For Real sensorless vector control, the carrier frequency is always
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 .
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
∗
SD
U
V
W
MC
Mechanical
brake
Motor
∗
The input terminal used differs according to the Pr.180 to Pr.189 settings.
•Sink logic
(a) (b) (c)
Time
Pr.4
RH
RM
RL
RT
Pr.5
Pr.6
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 )
∗
ON OFF
ON OFF
ON OFF
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
Output frequency