Time constant of the PT2-Filter for the additive command value interface (P-AXIS-00438)
For the additive command value interface (s. P-AXIS-00091, [HLI - External commanding of an axis]) a PT2-filter can be used to smooth the commanded position values. This may be necessary e.g. if the PLC does not run in the interpolation cycle time of the CNC.
The time constant of the PT2 filter is given in the parameter kenngr.in_add_interface_filter_time (P-AXIS-00438) in microseconds. The filter is inactive if the time constant is set to zero (default setting).
Variable name | Type | Permissible range | Axis type | Dimension |
in_add_interface_filter_time | UNS32 | 0 < in_add_interface_filter_time < MAX(UNS32) Default: 0 -> PT2-Filter is inactive | T, R, S | µs |
 | Due to the filter, the axis stop can be delayed a little bit, if the additive command value interface is deactivated (enable_w = FALSE). The axis stop can be checked in the movement flag pAC[axis_idx]^.addr^.StateLR_Data.X_IsMoved of the axis. (s.[HLI - Status information of an axis]). |
| |
The time constant of the PT2 filter may only be actualized via parameter update if the axis is in standstill. |
