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Chapter 4 Explanation of Functions
When "00" (quadrant-specific setting mode) is specified for the torque limit selection (b040), the torque
limits 1 to 4 apply as shown below.
Torque
Regeneration
(b042)
Powering
(b043)
Regeneration
(b044)
Powering (b041)
Reverse rotation
(RV)
Forward rotation
(FW)
When "01" (terminal-switching mode) is specified for the torque limit selection (b040), the torque limits 1
to 4 are set as shown in the example below. The torque limits 1 to 4 are switched by the torque limit
switches 1 and 2 assigned to intelligent input terminals.
(Example) When torque limit switch 1 (41) and torque limit switch 2 (42) are assigned to intelligent input
terminals [7] and [8], respectively:
Intelligent input terminals
b041
b042
b044
b043
hen applying the tW orque limitation function to the motor operation at low speeds, also use the overload
restriction function.
4.2.101 Reverse Run protection function
The reverse Run protection function is effective when "03"
(sensorless vector control), "04" (0Hz-range sensorless vector
control), or "05" (vector control with sensor) is specified for the V/F
characteristic curve selection (A044/A244).
For control reasons, especially during motor operation at low speed, the inverter may output a frequency
that instructs the motor to rotate in the direction opposite to that specified by the operation command. If
he counterrotation of
A044/A244: V/F characteristic curve
selection, 1st/2nd motors
b046: Reverse Run protection enable
Related code
t
p
the motor may damage the machine driven by the motor, enable the counterrotation
revention function.
Function code D Item ata Description
03 Sensorless vector control
04 0Hz-range sensorless vector control
V/F characteristic curve
A044/A244
selection
05
Vector control with sensor (not available for
A244)
00 Disabling counterrotation prevention Reverse Run protection
enable
b046
01 Enabling counterrotation prevention
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