Mitsubishi Electric FR-A800, Instruction Manual

Page: 441 / 1042

Parameters (F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
FR-A800 5 - 261
●
If the lift has a load in which the rated current of the inverter is exceeded, the maximum torque
may be insufficient.
For a lift without counterweight, setting Pr. 14 "Load pattern selection" to "2 or 3" (for lift load) and
setting Pr. 19 "Base frequency voltage" appropriately give the maximum torque a greater advan-
tage than when selecting the lift operation.
Lift operation adjustment (Pr. 61, Pr. 64)
The application range can be expanded by setting the parameters for adjustment of Pr. 61 and Pr. 64.
The setting range for the FR-A820-03160(55K) or lower and FR-A840-01800(55K) or lower.
The setting range for the FR-A820-03800(75K) or higher and FR-A840-02160(75K) or higher.
I002569E
Fig. 5-106: Torque boost in dependence of the output current
NOTE The stall prevention operation level is automatically lowered according to the cumulative value of
the electronic thermal O/L relay so as to prevent an inverter overload trip (E.THT, E.THM) from
occurring.
Pr. Name Setting range Description
61
Reference
current
0 to 500 A
Set the rated motor current value when the motor capacity and
inverter capacity differ, etc. Set the reference current (A) of the
stall prevention operation level.
0 to 3600 A
9999 (initial value) The rated inverter output current value is the reference.
64
Starting
frequency for
elevator mode
0 to 10 Hz Set the starting frequency for the lift operation.
9999 (initial value) Starting frequency is 2 Hz.
NOTES Even if the lift operation 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 disa-
ble the automatic acceleration/deceleration and give priority to JOG operation, second function
selection or third function selection. Note that during operation, an input of JOG and RT signal
does not have any influence even when the automatic acceleration/deceleration is enabled.
Even if Pr. 61 and Pr. 64 are set, changing Pr. 292 automatically resets to the initial setting (9999).
Set Pr. 61 and Pr. 64 after setting Pr. 292.
Parameters referred to
Pr. 0 Torque boost => page 5-652
Pr. 13 Starting frequency => page 5-251
Pr. 14 Load pattern selection => page 5-656
Pr. 19 Base frequency voltage => page 5-654
Pr. 2 Stall prevention operation level => page 5-84
Pr. 570 Multiple rating setting => page 5-201
0 100
115
120 140
Torque boost (%)
When Pr. 0 = 6 %
Pr. 0
Torque boost 0 %
Regenerative current
Pr. 292 = "5"
Pr. 292 = "6"
Driving current
(%)
6 %