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RFID System
User's Manual
(Modbus TCP)
Section 7
Host Communications Specifications
GET Reader/Writer OPERATING STATUS
This query reads the operating status from the Reader/Writer.
Query Format
Response Format
Normal Response
Error Response
Execution Example
Reading Status When the Reader/Writer Is in Run Mode and Idling
TX: 000000000006FF03C3000002
RX: 000000000007FF030400010001
Parameter
Description
Register address
The register address (C300 hex) that specifies the Reader/Writer operating status.
Word count
The number of words in the Reader/Writer operating status to read (0002 hex)
Parameter
Description
Byte count
The number of bytes in the Reader/Writer operating status that was read (04 hex)
Reader/Writer
operating status
Mode
Contains the mode of the Reader/Writer that was read in 4-digits hexadecimal.
0000 hex: Safe Mode
0001 hex: Run Mode
0002 hex: Slave Mode
Status
information
Contains the status of the Reader/Writer that was read in 4-digits hexadecimal.
0000 hex: Initializing
0001 hex: Idling
0002 hex: RF Tag communications in progress
0003 hex: Downloading
0004 hex: Error
0005 hex: Shutdown in progress
Parameter
Description
Exception code
For details, refer to
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
C300 hex
0002 hex
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Byte 9
···
Byte 12
Transaction
identifier
Protocol
identifier
Field length
Unit
identifier
Function code
Byte count
Reader/Writer operating
status
X
X
0000 hex
0007 hex
FF hex
03 hex
04 hex
4 bytes
Byte 9
Byte 10
Byte 11
Byte 12
Mode
Status information
2 bytes
2 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
