Hi, I am carrying out a project regarding the PLCs of the ABB brand mounted on KBA Rapida 105. Exactly I am analyzing the various models for 07KT94. I am faced with various suffixes after this name such as: B, C, F, I ... Can anyone tell me what's the difference between all these letters? Premise that the order code is always the same (GJR5252100R3261). Unfortunately I also found that trying to load the program on different letters, I get an error (Fehlerklasse: 2 Fehler-nr .: 00260). Thanks in advance for your help.