Elevator Mode (Automatic Acceleration/Deceleration) (Pr. 61, Pr. 64, Pr. 292) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

4.10.3 Elevator mode (automatic acceleration/deceleration) (Pr. 61, Pr. 64, Pr. 292)

Operation matching a load characteristic of elevator with counterweight can be performed.
Parameter
Name
Number
61 Reference current
Starting frequency for
64
elevator mode
Automatic acceleration/
292
deceleration
(1) Elevator mode
⋅ When "5" or "6" is set in Pr. 292 Automatic acceleration/deceleration , elevator mode is selected and each setting is
changed as in the table below.
⋅ Enough torque is generated during power driving and the torque boost value is automatically changed during
regeneration and operation without load so that overcurrent protection function does not activate due to over
excitation.
Name Normal Mode
Pr. 0
Torque boost
(6/4/3/2/1%)
Starting
Pr. 13 (0.5Hz)
frequency
Base frequency
Pr. 19 (9999)
voltage
Stall prevention
Pr. 22 (150%) etc.
operation level
⋅ When operating the elevator with load more than the rated inverter current, the maximum torque may become
insufficient. For the elevator without counterweight, setting "2 or 3" (for elevator load) in Pr. 14 Load pattern selection
and an appropriate value in Pr. 19 Base frequency voltage will generate larger maximum torque than when elevator
mode is selected.
REMARKS
⋅ Stall prevention operation level automatically decreases according to the electronic thermal relay function cumulative value, to
prevent inverter overload trip (E.THT, E.THM).
(2) Adjustment of elevator mode (Pr. 61, Pr. 64)
⋅ By setting the adjustment parameters Pr. 61 and Pr. 64, the application range can be made wider.
Parameter
Name
Number
Reference
61
current
Starting
64 frequency for
elevator mode
REMARKS
⋅ Even if elevator mode has been selected, inputting the jog signal (jog operation), RT signal (second function selection) or X9
signal (third function selection) during an inverter stop will switch to the normal operation and give priority to jog operation or
second and third function selection. Note that JOG and RT signal input is invalid even if JOG signal and RT signal are input
during operation with acceleration/deceleration selected.
⋅ Elevator mode is invalid when Advanced magnetic flux vector, Real sensorless vector control or vector control is selected.
⋅ Since the Pr. 61 and Pr. 64 settings automatically return to the initial value (9999) if the Pr. 292 setting is changed, set Pr. 292 first
when you need to set Pr. 61 and Pr. 64.
Initial
Setting Range
Value
55K or lower
9999 75K or higher
9999
0 to 10%
9999
9999
0
Elevator Mode
Pr. 292 = 5 Pr. 292 = 6
Changes according to the output
current (right chart)
Pr. 64 (2Hz)
Accelerate after maintaining 100ms
220V (440V)
150%
Setting Range
55K or lower 0 to 500A
75K or higher 0 to 3600A
9999 (initial value)
0 to 10Hz
9999 (initial value)
0 to 500A
Set the reference current for elevator mode.
0 to 3600A
Rated inverter current value reference
Set the starting frequency for the elevator mode.
Starting frequency 2Hz
0 Normal operation mode
Minimum acceleration/
1
deceleration mode (without brake)
Minimum acceleration/deceleration
11
mode (with brake)
Optimum acceleration/
3
deceleration mode
Elevator mode 1
5
(stall prevention operation level 150%)
Elevator mode 2
6
(stall prevention operation level 180%)
7, 8 Brake sequence mode 1, 2 (Refer to page 217.)
When Pr.0=6%
Torque boost 0%
Regenerative
current
180%
Description
For example, when the motor and inverter are different in
capacity, set the rated motor current value. Set reference
current (A) of the stall prevention operation level
The rated inverter output current is defined as reference.
Set the starting frequency for the elevator mode.
Starting frequency 2Hz
V/F pattern
V/F V/F V/F
Description
(Refer to
page 180.)
Torque boost (%)
Pr.292= "5"
Pr.292= "6"
6%
Pr.0
3%
Driving
0 100 120 140
current
115
(%)
4
163