Programmable Logic Controller (PLC) Siemens: How to troubleshoot hardware or firmware mismatches in TIA Portal This video provides a step-by-step example of how to resolve a hardware or firmware mismatch in TIA Portal using the “Change Device” feature. More > Tagged et200sp, firmware, hardware, HMI, how to, mismatch, PLC, s7-1200, s7-1500, s7-300, Siemens, software, tia portal, video