Hi, fairly new to Siemens platform but have been around PLCs in general for a long time. I have been told that some programming formats run more efficiently than others within the PLC (ie ST vs LAD). I find this contrary to what I thought I knew before. I was always led to believe that the different IEC 61131 formats were for the user's benefit, and that it's stored as machine code in the PLC (hence the need to compile?). Can anyone point me to a definitive source of documentation for this?
Thanks in advance!