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Set V/F pattern
(3) Constant-torque load application
(setting "2, 3")
Set "2" when a vertical lift load is fixed as power
driving load at forward rotation and
regenerative load at reverse rotation.
Pr. 0 Torque boost is valid during forward rotation
and torque boost is automatically changed to
"0%" during reverse rotation. Pr. 46 Second
torque boost is valid when the RT signal turns
on.
Set "3" for an elevated load that is in the driving
mode during reverse rotation and in the
regenerative load mode during forward rotation
according to the load weight, e.g. counterweight
system.
For the RT signal, set "3" in any of Pr. 178 to Pr.
182 (input terminal function selection) to assign
the function.
NOTE
Load pattern selection does not function under General-purpose magnetic flux vector control.
Changing the terminal assignment using Pr. 178 to Pr. 182 (input terminal function selection) may affect the other
functions. Make setting after confirming the function of each terminal.
Parameters referred to
Pr. 0, Pr. 46 (Torque boost) Refer to page 73
Pr. 3 Base frequency Refer to page 85
Pr. 178 to Pr. 182 (input terminal function selection) Refer to page 113
General-purpose magnetic flux vector control Refer to page 75
For vertical lift loads
At forward rotation boost...Pr. 0 (Pr. 46)
setting
At reverse rotation boost...0%
100%
Output voltage
Base frequency
Output frequency (Hz)
Reverse
rotation
Forward
rotation
Pr. 0
Pr. 46
Pr. 14 = 2
For vertical lift loads
At forward rotation boost...0%
At reverse rotation boost...
Pr. 0 (Pr. 46)
setting
100%
Output voltage
Base frequency
Output frequency (Hz)
Forward
rotation
Reverse
rotation
Pr. 0
Pr. 46
Pr. 14 = 3
REMARKS
When torque is continuously regenerated as vertical lift load, it is effective to set the rated voltage in Pr. 19 Base frequency voltage
to prevent trip due to current at regeneration.
When the RT signal is on, the other second functions are also valid.