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Section 7 Message Details
RFID System
User's Manual
(Modbus TCP)
Section 7
Host Communications Specifications
GET COMMUNICATIONS ERROR LOG
This query reads the log of communications errors that have occurred in the Reader/Writer.
Query Format
Response Format
Normal Response
Error Response
Parameter Description
Register address The register address (C600 hex) that specifies the communications error log information.
Word count The number of words in the communications error log information to read (0061 hex)
Parameter Description
Number of bytes in recent error query
information
The number of bytes in the recent error query information that was read
(FA hex)
Number of record The number of record in the recent error query information that was read.
Most recent
communications
error record
Operating time The operating time from when the Reader/Writer was started in 8-digits
hexadecimal (Unit: ms)
IP address of remote
node
Contains the IP address where the error occurred in 4-digits hexadecimal.
Example: C0A801C8 hex (192.168.1.200)
Transaction identifier Transaction identifier specified by the query when an error occurred.
Reserved 1 This field is always 0000 hex.
Function code Function code specified by the query when an error occurred.
Reserved 2 This field is always 00 hex.
Register address Register address specified by the query when an error occurred.
Exception code For details, refer to Exception Code Table in this section.
p.167
Reserved 3 Always 000000 hex.
End code For details, refer to End Codes in this section.
p.167
Parameter Description
Exception code For details, refer to Exception Code Table in this section.
p.167
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10 Byte 11
Transaction
identifier
Protocol identifier Field length
Unit
identifier
Function
code
Register address Word count
X X 0000 hex 0006 hex FF hex 03 hex C600 hex 0061 hex
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10 Byte 11
···
Byte 31
···
Byte 179
···
Byte 202
Transaction iden-
tifier
Protocol identifier Field length
Unit
identifier
Function code Byte count Number of records
Most recent communications
error record
···
Most recent communications
error record 7
XX
0000 hex 00C5 hex
FF hex 03 hex C2 hex 1 word 10 words
···
10 words
Byte 11
···
Byte 14 Byte 15
···
Byte 18 Byte 19 Byte 20 Byte 21 Byte 22 Byte 23 Byte 24 Byte 25 Byte 26 Byte 27 Byte 28 Byte 29 Byte 30 Byte 31
···
Byte 34
Operating time IP address of remote node
Transaction identi-
fier
Reserved 1 Function code
Reserv
ed 2
Register address
Excepti
on code
Reserved 3 End code
4 bytes 4 bytes 2 bytes 2 bytes 1 byte 00 hex 2 bytes 1 byte 3 bytes 4 bytes
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Transaction
identifier
Protocol identifier Field length
Unit
identifier
Function
code
Exception
code
X X 0000 hex 0003 hex FF hex 83 hex 1 byte
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