Sinumerik Alarm 12420 Channel %1 block %2 identifier %3 too long
%1 = Channel number
%2 = Block number, label
The symbol to be defined or the specified jump target has a name which is longer than the 32 characters allowed.
– 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 positions on the incorrect block. The symbol to be created or the target of program jumps (label) must conform to the system specifications, that means the name must begin with 2 letters (but the 1st sign must not be “§”) and may be up to a maximum of 32 characters.
Clear alarm with NC START or RESET key and continue the program.
- Siemens Diagnostics Guide by Siemens