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Chap. 5 FUNCTION CODES
Torque Limiter (Target quadrants) (H75)
H75 selects the configuration of target quadrants (Drive/brake, Forward/reverse rotation) in which the specified torque
limiter(s) is activated, from "Drive/brake torque limit," "Same torque limit for all four quadrants," and "Upper/lower
torque limits" shown in the table below.
Data for H75 Target quadrants
0: Drive/brake
Torque limiter A applies to driving (both of forward and reverse), and torque limiter B to braking
(both of forward and reverse).
First quadrant:
Forward driving
Second quadrant:
Reverse braking
Third quadrant:
Reverse driving
Fourth quadrant:
Forward braking
Torque limiter A
Torque limiter B
Torque limiter A
Torque limiter B
1: Same for all
four quadrants
Torque limiter A applies to all four quadrants; that is, the same torque limit applies to both driving
and braking in the forward and reverse rotations.
First quadrant:
Forward driving
Second quadrant:
Reverse braking
Third quadrant:
Reverse driving
Fourth quadrant:
Forward braking
Torque limiter A
Torque limiter A
Torque limiter A
Torque limiter A
Torque limiter A applies to the upper limit, and torque limiter B to the lower limit.
Depending upon the polarity of torque limiters A and B, the following patterns are available.
Torque limiter A Torque limiter B
Pattern 1 Positive Positive
Pattern 2 Positive Negative
Pattern 3 Negative Negative
First quadrant:
Forward driving
Second quadrant:
Reverse braking
Third quadrant:
Reverse driving
Fourth quadrant:
Forward braking
Torque limiter A
Torque limiter B
Pattern 1
First quadrant:
Forward driving
Second quadrant:
Reverse braking
Third quadrant:
Reverse driving
Fourth quadrant:
Forward braking
Torque limiter A
Torque limiter B
Pattern 2
First quadrant:
Forward driving
Second quadrant:
Reverse braking
Third quadrant:
Reverse driving
Fourth quadrant:
Forward braking
Torque limiter A
Torque limiter B
Pattern 3
2: Upper/lower
limits
• If the value of torque limiter A is less than that of torque limiter B, torque limiter A
applies to both the upper and lower limits.
• Selecting the "Upper/lower torque limits" may cause reciprocating oscillation between
the upper and lower limit values, depending upon a small difference between the upper
and lower limits, a slow response from the speed control sequence, and other
conditions.
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