Category: Troubleshooting

PROFINET Device Name Does Not Match: Causes and Step-by-Step Fixes

PROFINET Device Is “Not Reachable”: Causes and Step-by-Step Fixes

PLC Can Be Pinged but TIA Portal Cannot Connect

TIA Portal Cannot Find the PLC: Causes and Step-by-Step Fixes

Siemens BF or Bus Fault LED Is Flashing: Causes and Step-by-Step Fixes

Siemens Red ERROR or SF LED Is On: Causes and Step-by-Step Fixes

Siemens CPU Suddenly Goes Into STOP Mode: Causes and Troubleshooting

Siemens PLC Will Not Go Into RUN Mode: Causes and Fixes

Three-Phase Motor Hums but Will Not Start

Contactor Buzzing or Chattering: Causes and Fixes