Load Torque High Speed Frequency Control - Mitsubishi Electric 800 Series Instruction Manual

(A) Application parameters
5.14.6

Load torque high speed frequency control

Load torque high-speed frequency control is a function
that automatically sets the maximum operable frequency
according to the load.
The load size during power driving is estimated by
detecting average currents at set timings after a start.
When the load is light, the frequency is increased from
the originally-set frequency. (In regenerative driving, the
frequency is not increased.)
This function is designed to increase speed automatically
under light load, for example to minimize the incoming/
outgoing time in a multi-story parking lot.
Pr. Name
4 Multi-speed setting (high
D301 speed)
5 Multi-speed setting
D302 (middle speed)
Stop-on contact/load
270 torque high-speed
A200 frequency control
selection
271 High-speed setting
A201 maximum current
272 Middle-speed setting
A202 minimum current
273
Current averaging range
A203
274 Current averaging filter
A204 time constant
Connection diagram
Sink logic
Pr.186 = 19
Power supply
Load torque high-speed frequency

The applied terminals differ by the settings of Pr.180 to Pr.189 (Input terminal function selection).
466
PARAMETERS
Initial value
60 Hz
30 Hz
0
50%
100%
9999
16
MC
MCCB
R/L1
S/L2
T/L3
Start signal STF
CS(X19)
SD
<Without high-speed
frequency control>
Whether there is a load or
not, the lift is moved
vertically at the same speed.
Setting
range
0 to 590 Hz Set the higher-speed frequency.
0 to 590 Hz Set the lower-speed frequency.
0 Normal operation
1 Stop-on-contact control (Refer to
2 Load torque high-speed frequency control
Stop-on-contact (refer to
3
frequency control
11 Stop-on-contact control
Stop-on-contact + load torque high-
13 speed frequency control
(Refer to page
0 to 400%
Set the upper and lower limits of the current at high and
middle speeds.
0 to 400%
Set the average current during acceleration from (Pr.273  1/
0 to 590 Hz
2) Hz to (Pr.273) Hz.
Set the average current during acceleration from (Pr.5  1/2)
9999
Hz to (Pr.5) Hz.
Set the time constant of the primary delay filter relative to the
output current.
(The time constant [ms] is 0.5  Pr.274, and the initial value is
1 to 4000
8 ms.)
A larger setting results in a stable operation with poorer
response.
Mechanical
brake
U
V
Motor
W
∗
<With high-speed
frequency control>
The lift with a light load or without
a load is moved faster than the lift
with a load.
(The output frequency is increased
only during power driving.)
Description
page 463.)
page 463) + load torque high- speed
E.OLT invalid
under stop-on-
contact control
463.)
Light
Faster