￭
Rush control
In torque control, the motor could potentially rush if the load were suddenly lost.
The control program has a rush control function that decreases the torque
reference whenever the motor speed (90.1) exceeds parameter 30.11 or 30.12.
Motor speed
Overspeed trip level
Rush control active
Overspeed trip level
30.12
30.11
0
31.30
31.30
Time
The function is based on a PI controller. The proportional gain and integration
time can be defined by parameters. Setting these to zero disables rush control.
Settings and diagnostics
Parameter groups: 30 Limits (page 306), 31 Fault functions (page 316) and 90
Feedback selection (page 484).
Parameters: 26.81 Rush control gain (page 305) and 26.82 Rush control integration
time (page 305).
￭
Encoder support
The program supports two single-turn or multiturn encoders (or resolvers). The
following optional interface modules are available:
• TTL encoder interface FEN-01: two TTL inputs, TTL output (for encoder
emulation and echo) and two digital inputs
• Absolute encoder interface FEN-11: absolute encoder input, TTL input, TTL
output (for encoder emulation and echo) and two digital inputs
84 Program features
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