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H18 Torque Limiter (Mode selection) d32, d33 (Torque Control, Speed limits 1 and 2)
When "Vector control without speed sensor" or "Vector control with speed sensor" is selected, the inverter can limit the
motor-generating torque according to a torque command sent from external sources.
Torque Limiter (Mode selection) (H18)
H18 specifies whether to enable or disable the torque limiter. When the torque limiter is enabled, a torque current
command or torque command can be selected.
Data for H18 Available control
0
Disable (Speed control)
2
Enable (Torque control with torque current command)
3
Enable (Torque control with torque command)
Torque Commands
Torque commands can be given as analog voltage input (via terminals [12] and [V2]) or analog current input (via
terminal [C1]), or via the communications link (communication dedicated function codes S02 and S03).
（To use
analog voltage/current inputs, it is necessary to set E61 (for terminal [12]), E62 (for terminal [C1]), or E63 (for terminal
[V2]) data to "10" or "11.")
Input Command form Function code setting Specifications
Torque command E61 = 10 Motor rated torque ±200% / ±10 V Terminal [12]
(-10 V to 10 V)
Torque current command E61 = 11 Motor rated torque current ±200% / ±10V
Torque command E63 = 10 Motor rated torque ±200% / ±10V Terminal [V2]
(-10 V to 10 V)
Torque current command E63 = 11 Motor rated torque current ±200% / ±10V
Torque command E62 = 10 Motor rated torque 200% / 20 mA Terminal [C1]
(4 to 20 mA)
Torque current command E62 = 11 Motor rated torque current 200% / 20 mA
S02
(-327.68 to 327.67%)
Torque command Motor rated torque / ±100.00%
S03
(-327.68 to 327.67%)
Torque current command Motor rated torque current / ±100.00%
Polarity of Torque Commands
The polarity of a torque command switches according to the combination of the polarity of an external torque command
and a run command on terminal [FWD] or [REV], as listed below.
Polarity of torque command Run command (ON) Torque polarity
FWD Positive torque (Forward driving/Reverse braking)
Positive
REV Negative torque (Forward braking/Reverse driving)
FWD Negative torque (Forward braking/Reverse driving)
Negative
REV Positive torque(Forward driving/Reverse braking)
Cancel torque control -- Hz/TRQ (E01 to E07, data = 23)
When the torque control is enabled (H18 = 2 or 3), assigning the terminal command Hz/TRQ ("Cancel torque control")
to any of the general-purpose digital input terminals (data = 23) enables switching between the speed control and the
torque control.
Cancel torque control signal
Hz/TRQ Operation
ON Cancel torque control (Enable speed control)
OFF Enable torque control
Torque Control (Speed limits 1 and 2) (d32, d33)
Torque control controls the motor-generating torque, not the speed. The speed is determined secondarily by load torque,
mechanical inertia, and other factors. To prevent a dangerous situation, however, the speed limit functions (d32 and
d33) are provided inside the inverter.
If a regenerative load (which is not generated usually) is generated under droop control, or if function codes
are incorrectly configured, the motor may rotate at an unintended high speed. You can specify the overspee
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