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Chapter 4
When "00" (quadrant-specific setting mode) is specified for the torque limit selection (b040), the torque limits 1 to 4
apply as shown below.
Reverse rotation (RV)
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:
When applying the torque 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 the counterrotation of the
motor may damage the machine driven by the motor, enable the counterrotation prevention function.
Item
V/F characteristic curve
selection
Reverse Run protection
enable
Torque
Regeneration
Powering (b041)
(b042)
Powering
Regeneration (b044)
(b043)
Intelligent input terminals
Function code
Data
03
A044/A244
04
05
00
b046
01
4-93
Explanation of Functions
Forward rotation (FW)
b041
b042
b044
b043
Related code
A044/A244: V/F characteristic curve selection,
1st/2nd motors
b046: Reverse Run protection enable
Description
Sensorless vector control
0Hz-range sensorless vector control
Vector control with sensor (not available for A244)
Disabling counterrotation prevention
Enabling counterrotation prevention
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