What is the possible problem and solution concerning this PLC CPU, which is always in connecting status unless you turn off the power, can not connect to TIA portal and also there is a flickering orange light. .
CONNECTING" does not mean it’s looking for TIA, it’s trying to connect to configured hardware in the program. In most cases, the PLC will startup anyway, even with hardware missing and will simply be in error, but the program will still start. If it’s stuck in connecting, you should try to do a memory clear and also load the program again. If it’s still doing it, look into your hardware configuration