I just installed a new machine imported from Europe and powered it up, but the error LED is flashing. The HMI connects, and I have an output indicating there’s no fault in the physical system. However, I don’t have the necessary software to connect and clear the faults. I’ve dealt with similar issues on AB PLCs, where going online was required to resolve them, but I haven’t been provided with a computer or software at this job yet. Is there anything I can do in this situation?
Based on your situation with the newly installed machine, the flashing error LED on the Siemens S7-1200 typically indicates a fault that may require clearing. Since you don’t have the software or the ability to go online with the PLC, here are a few steps you can try to address the issue:
- Check Power and Grounding: Make sure the power supply is correct and stable. European machines might be configured for different voltage standards, so ensure your power source is compatible. Also, check for proper grounding.
- Inspect Hardware Connections: Since the HMI connects and indicates no fault in the physical system, the issue could lie within the PLC configuration. Verify all cables, modules, and sensors are properly connected and seated. Loose connections or wiring mistakes can trigger errors.
- Cycle the Power: Turn off the machine and PLC, wait for 30 seconds, and restart. This can sometimes reset the PLC and clear temporary faults.
- Reset Button on the PLC: Try performing a manual reset on the S7-1200 by pressing and holding the reset button on the front panel of the CPU. This might clear the error without needing to go online with the software.
- Check for Emergency Stop or Safety Interlocks: Some machines come with emergency stops or safety interlocks that could trigger errors if not properly configured or engaged. Double-check that all safety devices are in the correct position.
- Review the Machine’s Documentation: The error could be related to a specific configuration or requirement of the machine. Look through any manuals or documentation that came with the machine for troubleshooting tips or specific procedures for clearing faults.
- Contact the Supplier: If these steps don’t work, contacting the machine supplier or manufacturer might be necessary. They could provide additional insights or remote support.
Since you’re familiar with Allen-Bradley systems, Siemens systems often also require connecting to the PLC using TIA Portal to view and clear errors. However, the steps above might give you a temporary workaround until you can get access to the necessary software.