Sinumerik Alarm 12620 Channel %1 block %2 accessing this variable as single character not possible

Sinumerik Alarm 12620 Channel %1 block %2 accessing this variable as single character not possible

Parameters:
%1 = Channel number
%2 = Block number, label
%3 = Source string

Definitions:
The variable is not a user-defined variable. The single character access is only allowed for user-defined variables (LUD/GUD).

Reactions:
– Alarm display.
– Interface signals are set.
– Correction block

Remedy:
Temporarily store variable in user-defined STRING, process this and put back into storage.

Program Continuation:
Clear alarm with NC START or RESET key and continue the program.