Mitsubishi Electric FR-A700 EC, Instruction Manual

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Parameter Set V/f pattern
FR-A700 EC 6 - 179
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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.
I001549E
Fig. 6-63: Torque boost in dependence of the output current
NOTE
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).
Overload Capacity
120% 150% 200% 250%
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%
Tab. 6-38: Influence of the overload capacity on the current limit
When Pr. 0 = 6%
Torque boost [%]
6%
Pr. 0
3 %
Torque boost 0%
Regenerative current Driving current
[%]
100
115
120 140
Pr. 292 = 5
Pr. 292 = 6