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114
Sec
tion 6
Error Log
s
RFID System
User's Manual
(Modbus TCP)
Section 6
Functions
Error Logs
The Reader/Writer manages errors that occur during operation in logs. The error logs are saved until
the power supply to the Reader/Writer is turned OFF. You can read the error logs by sending queries
from the host device or by using a Web browser.
The following logs are saved.
System Error Log
Each record in the system error log consists of 16 bytes in the format that is shown in the following
table. Up to eight records are recorded. To read the system error log, either send a GET SYSTEM
ERROR LOG query or read it from a Web browser.
Refer to
Host Communications Specifications
for details on the GET SYSTEM ERROR
LOG query.
Operating Time
This is the operating time of the Reader/Writer when the error occurred.
Error Code
This code identifies the nature of the error.
Refer to
Host Communications Specifications
for the meanings of the error codes.
Attached Information 1
The Attached information1, representing the erroneous classification settings.
00000001 hex: Network settings
00000002 hex: RF Tag communication settings
Attached Information 2
This field is always 00000000 hex.
Category
Description
System error log
This log contains up to eight fatal errors that were detected by the Reader/Writer. They are
given in chronological order. If more than eight system errors occur, the oldest records are
deleted in order.
Communications error log
This log contains query information in chronological order for queries for which the Reader/
Writer returned an error response (error codes other than 0000 hex). If more than eight system
errors occur, the oldest records are deleted in order.
Recent error query log
The Reader/Writer always records all of the frame data for one query for which the Reader/
Writer returned an error response.
Bytes 1 to 4
Bytes 5 to 8
Bytes 9 to 12
Bytes 13 to 16
Operating time
Error code
Attached information 1
Attached information 2
4 bytes
4 bytes
4 bytes
4 bytes