Omron V780 Series User Manual page 281

GET MOST RECENT COMMAND ERROR INFORMATION
 Function
This command is used to check the most recent command error information from the Reader/Writer.
The most recent command error information is cleared when the Reader/Writer is restarted.
 Command Format
Byte-0 Byte-1
Transaction identi-
fier
X X
Parameter
Register address
Word count
 Response Formats
• Normal Response
Byte-0 Byte-1
Transaction identifier
X X
Byte-9 ... Byte-12
Time information
4 bytes
Byte-23 Byte-24
Reader/Writer Number
2 bytes
Parameter
Byte count
Most recent
command error
information
UHF RFID System V780-series Reader/Writer User's Manual (Z389)
Byte-2 Byte-3 Byte-4
Protocol identifier Field length
0000 hex 0006 hex
The register address (D900 hex) that specifies reading the most recent command
error information
The number of words in the most recent command error information to read (000C
hex)
Byte-2 Byte-3
Protocol identifier
0000 hex
Byte-13 ... Byte-16
Most recent command error information
IP address of the remote
device
4 bytes
Byte-25 Byte-26 Byte-27
Most recent command error information
Attached information 1
4 bytes
The number of bytes in the most recent command error informa-
tion that was read (18 hex)
Time information Gives the time information in 8-digit hexadecimal
IP address of the remote Gives the IP address that was read in 8-digit hexadecimal.
device
Example: C0A801C8 hex (192.168.1.200)
Transaction identifier The transaction identifier specified in the command that produced
the error
Command code Gives the command code in 8-digit hexadecimal.
Error code For details, refer to 9-2-1 Command Errors on page 9-4.
Reader/Writer Number This displays the Reader/Writer number of the reader/writer com-
municating with the RF Tag in 4 hexadecimal digits.
* This is 0000 hex if Multi-Reader/Writer mode is disabled or if
Attached information 1 Gives additional information 1 on the error in 8-digit hexadecimal.
Attached information 2 Gives additional information 2 on the error in 8-digit hexadecimal.
7 Modbus/TCP Communications
Byte-5 Byte-6 Byte-7
Unit Function
identifier code
FF hex 03 hex
Description
Byte-4 Byte-5 Byte-6
Field length Unit identifier
001B hex FF hex
Byte-17 Byte-18 Byte-19
Transaction identifier Command code
2 bytes
Byte-28 Byte-29 Byte-30
Attached information 2
Description
there is a command error.
Byte-8 Byte-9 Byte-10 Byte-11
Register address Word count
D900 hex 000C hex
Byte-7 Byte-8
Function code Byte count
03 hex 18 hex
Byte-20 Byte-21 Byte-22
Error code
2 bytes 2 bytes
Byte-31 Byte-32
4 bytes
7 - 129
7