Sinumerik Alarm 14520 Channel %1 block %2 illegal PROC instruction in data definition section
%1 = Channel number
%2 = Block number, label
The PROC statement may only be programmed at the beginning of the subroutine.
– Alarm display.
– Interface signals are set.
– Correction block is reorganized.
Modify NC part program appropriately.
Clear alarm with NC START or RESET key and continue the program.
- Siemens Diagnostics Guide by Siemens