Sinumerik Alarm 12450 Channel %1 block %2 label defined twice
%1 = Channel number
%2 = Block number, label
The label of this block already exists. If the NC program is compiled off-line, the entire program is compiled block for block. During this procedure all multiple labels are recognized; this is not always the case with online compilation. (Only the actual program run is compiled here, i.e. program branches that are not passed through in this run are disregarded and could therefore contain programming errors).
– Alarm display.
– Interface signals are set.
– Correction block
Press the NC Stop key and select the function “Correction block” with the soft key PROGRAM CORRECT. The correction pointer is positioned on the block where the displayed label occurs for the second time. Use the editor to search the part program where this label occurs for the first time, and change one of the names.
Clear alarm with NC START or RESET key and continue the program.
- Siemens Diagnostics Guide by Siemens