Fuji Electric FRENIC MEGA G2 Series

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5.3 Description of Function Codes 5.3.2 E codes (Extension terminal functions)

5-180

E49

Torque Command Monitor (Polarity selection)

The polarity of calculated torque value in v/f control or the torque command value in vector control is normally + for

driving and – for braking. However in the case of hoisting load, when the motor rotation direction changes from

forward direction to reverse direction, the torque polarity also changes from driving to braking. If it monitors the

torque data by FRENIC-Loader, we cannot take the expected data around zero speed because the polarity changes.

If E49 is set to 0, the torque monitor data becomes + for forward/driving and reverse/braking, - for forward/braking

and reverse/driving. Therefore we can monitor the continuous torque data around zero speed.

E49 data

Torque monitor polarity

Torque polarity

(+ for forward/driving and reverse/braking, - for forward/braking and reverse/driving)

Plus for driving, Minus for braking (factory default)

First quadrant:

Forward/Driving

Output torque

Motor speed0

Second quadrant:

Reverse/Braking

Third quadrant:

Reverse/Driving

Fourth quadrant:

Forward/Braking