# Maximum permissible absolute radius difference (P-CHAN-00171)

P-CHAN-00171 | Maximum permissible absolute radius difference during circle programming
Description | This parameter defines the permissible absolute radius difference of the circle radii between the starting point and the target point. If the radius difference of a programmed circle is below the limit defined by the parameter, the circle radius is transferred linearly to the target radius starting from the starting radius; otherwise an error message is output. If the parameter is not assigned or is assigned the value 0, the function is inactive
Parameter | max_radius_diff_circle
Data type | UNS32
Data range | 0 < max_radius_diff_circle < 10000
Dimension | 0.1µm
Default value | 0
Remarks | CHAN-00171 is only active only when circle centre point compensation is inactive (G164). Parameterisation example: The circle radius error may be 0.01 mm. max_radius_diff_circle 100