Sinumerik Alarm 12180 Channel %1 block %2 illegal chaining of operators %3
%1 = Channel number
%2 = Block number, label
%3 = Chained operators
Operator chaining means the writing in sequence of binary and unary operators without using any form of parentheses.
N10 ERG = VARA – (- VARB) ; correct notation
N10 ERG = VARA – – VARB ; error!
– Alarm display.
– Interface signals are set.
– Correction block
Formulate the expression correctly and unambiguously making use of parentheses. This improves clarity and readability of the program.
Clear alarm with NC START or RESET key and continue the program.
- Siemens Diagnostics Guide by Siemens