Sinumerik Alarm 27094 Write access to system variable %1 only allowed from NCK-SPL
%1 = Name of safety system variable concerned
Write access to a safety system variable is only allowed from the part program / _N_CST_DIR/_N_SAFE_SPF. If this error occurs, an instruction from another part program was detected.
– Alarm display.
Check the part programs you are using for write accesses to safety system variables.
Clear alarm with the RESET key. Restart part program
- Siemens Diagnostics Guide by Siemens