Mitsubishi FR-A740-00023-EC, Instruction Manual

Page: 167 / 474

157
Set V/F pattern
4
P
ARAME
T
E
R
S
4.10.3 Elevator mode (automatic acceleration/deceleration) (Pr. 61, Pr. 64, Pr. 292)
(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.
⋅
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.
⋅
When elevator mode ( Pr. 292 = 5, 6) is set with automatic acceleration / deceleration set, the stall prevention
operation level is changed as shown below.
Operation matching a load characteristic of elevator with counterweight can be performed.
Parameter
Number
Name
Initial
Value
Setting Range Description
61 Reference current 9999
01800 or
less
0 to 500A
Set the reference current for elevator mode.
02160 or
more
0 to 3600A
9999 Rated inverter current value reference
64
Starting frequency for
elevator mode
9999
0 to 10% Set the starting frequency for the elevator mode.
9999 Starting frequency 2Hz
292
Automatic acceleration/
deceleration
0
0 Normal mode
1
Minimum acceleration/
deceleration (without brake)
(Refer to page
173.)
11
Minimum acceleration/
deceleration (with brake)
3
Optimum acceleration/
deceleration
5
Elevator mode 1
(stall prevention operation level 150%)
6
Elevator mode 2
(stall prevention operation level 180%)
7, 8 Brake sequence mode 1, 2 (Refer to page 208.)
Normal Mode
Elevator Mode
Pr. 292 = 5 Pr. 292 = 6
Torque boost
Pr. 0
(6/4/3/2/1%)
Changes according to the output
current (right chart)
Starting
frequency
Pr. 13 (0.5Hz)
Pr. 64 (2Hz)
Accelerate after maintaining 100ms
Base frequency
voltage
Pr. 19 (8888) 440V
Stall prevention
operation level
Pr. 22 (150%) etc. 150% 180%
REMARKS
⋅
Stall prevention operation level automatically decreases according to the electronic thermal relay function cumulative value, to
prevent inverter overload shut-off (E.THT, E.THM).
SLD LD ND HD
Pr. 570 = 0 Pr. 570 = 1 Pr. 570 = 2 Pr. 570 = 3
Stall prevention
operation level
Pr. 292
= 5
110% 120% 150% 200%
Pr. 292 = 6 115% 140% 180% 230%
V/F V/F V/F
6%
Pr.292 = "5"
Driving
current
(%)
When Pr.0 =6%
Torque boost (%)
Regenerative
current
0
Pr.0
3%
100
115
Pr.292 = "6"
120 140
Torque boost 0%