Sinumerik Alarm 12720 Channel %1 block %2 program number for macro call (G65/G66) missing
%1 = Channel number
%2 = Block number, label
During macro call with G65/G66 no program number was defined. The program number must be programmed with address “P”.
– Alarm display.
– Interface signals are set.
– Correction block
Modify part program.
Clear alarm with NC START or RESET key and continue the program.
- Siemens Diagnostics Guide by Siemens