# ID 20438

Channel parameters: Axis number equal to 0 within master/slave coupling.
Description | During start-up, the check of the channel parameters detects that in the default coupling group 0 (zero) a master or slave axis (P-CHAN-00037, P-CHAN-00038) with the logical axis number 0 (zero) is defined.
Response | Class | 1 | Start-up of the control is continued.
Solution | Class | 1 | During start-up in case of conflict the master-/slave axes pair with the wrong logical axis number is skipped and the start-up is continued. P-CHAN-00037 or P-CHAN-00038 must be specified with permissible logical axis numbers (> 0).
Parameter | %1: | Current value [-]
Index of the invalid master-/slave axes pair
%2: | Logical axis number [-]
Axis number of master axis
%3: | Logical axis number [-]
Axis number of slave axis.
Error type | 2, Error message by data transfer from parameter list into control device.