# Control flags

## Parametrisation

The parameter P-CHAN-00009 activates jerk limiting at tangential block transitions. A return takes place at tangential transitions between 2 circles of different radii or between a circle and a linear block, for instance.

Excerpt from the channel parameter list:

| corr_v_trans_jerk 1

The parameter mentioned above is effective only in conjunction with the jerk-limited acceleration profile.

The parameter P-CHAN-00110 activates jerk limiting in polynomial blocks. Jerk monitoring is always active with circular blocks.

Polynomial blocks are generated in the CNC in conjunction with polynomial contouring, spline and HSC functions.

Excerpt from the channel parameter list:

| check_jerk_on_poly_path 1

The parameter P-CHAN-00097 selects the CNC braking mode when feedhold is active. When the flag is set, the feedhold parameter block is used for the braking operation, i.e. braking is possible at a higher acceleration than when part machining or positioning is active.

Excerpt from the channel parameter list:

| use_drive_curr_limit 1

Pay attention to the following for the jerk-limited acceleration profile in line with the descriptions:

An increase in deceleration values at constant jerk does not automatically lead to a shorter braking distance. With the jerk-limited profile, this also depends on the ramp time and the velocity decrease difference.

The borderline case is described in the section “Jerk-limited default acceleration profile“ .