# Logical axis number (P-CHAN-00035)

P-CHAN-00035 | Logical number of an axis in the NC channel
Description | The logical axis number is unique in the entire system. The logical axis number is used to assign the axis designation in the NC program to the axis data (axis parameter lists, see [AXIS]) supplied by axis management. Only these logical axis numbers are significant if they are known to the axis management.

The logical axis number "0" is not permitted.

Parameter | gruppe[i].achse[j].log_achs_nr
Data type | UNS16
Data range | 0 ... MAX(UNS16)
Dimension | ----
Default value | -
Remarks | A logical axis number may not be assigned several times. A logical axis number may not be simultaneously configured as path axis and spindle. If this is the case, the plausibility check generates an error message. Axes of the 'spindle' type may not be specified as path axes since they are located in a spindle interpolator on start-up.

Parameterisation example:

An axis group with 3 axes is to be configured. The first axis is assigned the axis data with the logical axis number '2', the second axis is assigned the data with the logical axis number '7' and the third axis is assigned the data with the logical axis number '1' :

gruppe[0].achse[0].log_achs_nr 2

gruppe[0].achse[1].log_achs_nr 7

gruppe[0].achse[2].log_achs_nr 1