Diagnosing intermittent Presto Reader transaction failures due to faulty Ethernet connections. Troubleshooting steps, safety protocols, and preventative maintenance.
This information can be found in the Presto reader's network configuration settings.
This helps determine the switch's capabilities and known issues.
This identifies potential points of failure in the network cabling infrastructure.
Ethernet communication relies on consistent signal integrity. Voltage drops, signal attenuation due to cable damage, and electromagnetic interference (EMI) can disrupt data transmission, leading to transaction failures. The Presto reader likely uses TCP/IP for transaction processing. Network errors manifest as incomplete data packets or timeouts. Ethernet cables are rated for specific temperatures; extreme cold (-40C) can affect cable flexibility and conductivity. Baud rate mismatch is unlikely, but a firmware issue could also interrupt correct handshaking.
Implement preventative measures to minimize future failures. Regularly inspect Ethernet cables for damage. Use cable ties to provide strain relief and prevent cables from being bent or pulled. Ensure the environment around the reader is free from excessive moisture and protected from extreme temperature fluctuations. Shielded Ethernet cables offer increased protection against EMI.
A degraded Ethernet cable may pass basic continuity tests but still exhibit signal degradation under load. Replace the suspect cable with a new, high-quality cable even if the initial test appears normal. Consider adding a ferrite choke to the Ethernet cable near the reader to suppress high-frequency EMI.