Load Torque High-Speed Frequency Control - Mitsubishi Electric FR-A800 Series Instruction Manual

NOTE
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
Parameters referred to
Pr.4 to Pr.6, Pr.24 to Pr.27 (multi-speed
Pr.15 Jog frequencypage 410
Pr.22 Stall prevention operation level, Pr.48 Second stall prevention operation level
Pr.22 Torque limit levelpage 245
Pr.59 Remote function
Pr.72 PWM frequency
Pr.79 Operation mode
Pr.95 Online auto tuning
Pr.128 PID action selectionpage 601
Pr.178 to Pr.189 (Input terminal function
Pr.270 Stop-on contact/load torque high-speed frequency control
Pr.292 Automatic acceleration/decelerationpage

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.
<Without high-speed
frequency control>
Whether there is a load or
not, the lift is moved
vertically at the same speed.
Pr.
4 Multi-speed setting
D301 (high 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
A203 range
274 Current averaging filter
A204 time constant
580
5. PARAMETERS
5.14 (A) Application parameters
Downloaded from ManualsNet.com
setting)page 411
selectionpage 377
selectionpage 356
selectionpage 389
selectionpage 558
selection)page 521
384,
<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.)
Initial value
Name
FM CA
60 Hz 50 Hz
30 Hz
0
50%
100%
9999
16
search engine
levelpage 431
selectionpage 580
page 387
Light
Faster
Setting range
0 to 590 Hz Set the higher-speed frequency.
0 to 590 Hz Set the lower-speed frequency.
0 Normal
1 Stop-on-contact control (Refer to
2 Load torque high-speed frequency control
Stop-on contact + load torque high speed frequency control (Refer
3
to page 577.)
11 Stop-on-contact control
Stop-on contact + load torque high
13 speed frequency control (Refer to
page 577.)
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 × 1/2) Hz
0 to 590 Hz
to (Pr.273) Hz.
Set the average current during acceleration from (Pr.5 × 1/2) Hz to
9999
(Pr.5) Hz.
Set the time constant of the primary delay filter relative to the output
current.
1 to 4000
(The time constant [ms] is 0.5 × Pr.274, and the initial value is 8 ms.)
A larger setting results in a stable operation with poorer response.
Description
page 577.)
E.OLT is invalid under stop-
on-contact control.