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CRC_ERROR

Cyclic Redundancy Check (CRC) Error is an indication of data corruption. When evaluating data comprehensively, CRC validates packets of information transmitted by devices, cross-referencing them against the extracted data to ensure accuracy. In sending packets, BACnet automatically computes and stores a CRC value for each packet. Upon reception, BACnet recalculates the CRC value of the received packet and compares it to the original value. A CRC error is triggered if the two values do not precisely match.

CRC_ERROR

Causes of CRC Errors

Numerous factors can contribute to the occurrence of a CRC error. Among the most prevalent reasons is a packet error, resulting from poor or intermittent network communications, creating an opportunity for the introduction of invalid data into the file. Other potential causes include exposure to noise and suboptimal wiring.

Indicators of CRC Error

As CRC errors can sometimes go unnoticed, signs become apparent when users observe dropped information packets, meters failing to appear online, or data stagnating and not updating.

Resolving CRC Errors

To prevent the recurrence of CRC errors, one can employ tools such as Wireshark or an MS/TP sniffer to capture both outgoing and incoming packets.

Steps to Address CRC Errors

1、Capture several hundred frames of packets and import them into Wireshark.
2、Verify that the CRC byte matches or adds up correctly; any discrepancy indicates a CRC error that needs attention.

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