Sinumerik Alarm 120006 The channel switchover is currently disabled by area %1.
%1 = Operating area name
The area %1 has disabled the channel switchover at the moment, as it is performing a critical operation (e.g. execution from external sources, etc.), during which no channel switchover may occur.
– Alarm display.
Wait until the critical operation is finished or end the critical operation manually.
- Siemens Diagnostics Guide by Siemens