Sinumerik Alarm 26051 Channel %1 in block %2 unanticipated stop crossed in continuous path mode
%1 = Channel number
%2 = Block number, label
The path interpolation did not stop, as required, at the end of the block, but will only decelerate to a standstill in the next block. This error situation occurs if the stop at block change was not planned by the path interpolation or was not detected early enough. A possible cause is that the PLC changed the spindle speed when $MA_SPIND_ON_SPEED_AT_IPO_START > 0, and the machine has to wait until the spindle has returned to the setpoint range. Another possible cause is that a synchronized action needs to be finished before the path interpolation continues. The alarm is only out- put if $MN_TRACE_SELECT = ‘H400’. The alarm output is normally suppressed. – $MN_TRACE_SELECT has SIEMENS password protection. Reactions: – Alarm display.
$MA_SPIND_ON_SPEED_AT_IPO_START = 1. Program G09 before the alarm output in the block to allow the path interpolation to stop as planned.
Clear alarm with the Delete key or NC START.
- Siemens Diagnostics Guide by Siemens