# ID 20442

Channel parameters: Recursive master-slave assignment is not permitted.
Description | At start-up, a check of the channel parameters detects that an axis in the default coupling group 0 (zero) is defined both as a master axis P-CHAN-00037 and as a slave axis P-CHAN-00038 in different coupling pairs.
Response | Class | 1 | Controller start-up is continued.
Solution | Class | 1 | In case of conflict, the master/slave axis pair with the recursive master/slave axes linking is skipped at start-up and the start-up is continued. A master axis P-CHAN-00037 must always remain the master axis within a coupling group in different coupling pairs.

Note:

The complete number of master/slave axis pairs configured in the channel parameter list may then not be available after start-up in the channel.

Parameter | %1: | Current value [-]
Index of the first master/slave axes pair
%2: | Current value [-]
Index of the second master/slave axes pair
%3: | Logical axis number [-]
Axis number of the invalid master axis configured
Error type | 2, Error message by data transfer from parameter list into control device.