Elevator Mode (Automatic Acceleration/Deceleration) (Pr. 61, Pr. 64, Pr. 292) - Mitsubishi Electric FR-A720-00030-NA 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.
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).
 When elevator mode (Pr. 292 = 5, 6) is set with automatic acceleration / deceleration set, the stall prevention
operation level is changed as shown below.
Pr. 292 = 5
Stall prevention
operation level
Pr. 292 = 6
Setting Range
Initial
Value
200V class (400V class)
02150 (01100)
or less
9999 02880 (01440)
or more
9999
0 to 10%
9999
9999
0
1
11
0 3
5
6
7, 8
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% 180%
SLD LD
Pr. 570 = 0 Pr. 570 = 1
110% 120%
115% 140%
Description
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
Normal mode
Minimum acceleration/
deceleration (without brake)
Minimum acceleration/
deceleration (with brake)
Optimum acceleration/
deceleration
Elevator mode 1
(stall prevention operation level 150%)
Elevator mode 2
(stall prevention operation level 180%)
Brake sequence mode 1, 2 (Refer to page 221.)
When Pr.0=6%
Torque boost (%)
6%
Pr.0
3%
Torque boost 0%
Regenerative
0
current
ND
Pr. 570 = 2
150%
180%
V/F pattern
V/F V/F V/F
(Refer to page
182.)
Pr.292= "5"
Pr.292= "6"
Driving
100 120 140
current
115
(%)
HD
Pr. 570 = 3
200%
230%
165
4