Omron V680S Series User Manual page 44

Section 2
Names and Functions of Components
 Error Source Device Information
If the error occurs in the Reader/Writer after receiving a query from the host device, the error source
device information is set to 0000 hex. If the COPY DATA query is sent and the error occurred at the
copy destination Reader/Writer, the error source device information is set to 0001 hex.
 Reserved
Reserved fields are always 00 hex.
RFID System
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User's Manual