User's Manual
Table Of Contents
- Modbus/TCP Communications
- 7-1 Outline
- 7-2 Message Formats
- 7-3 RF Communications Command Options
- 7-4 Communications Procedure
- 7-5 Commands
- 7-6 V780 Command Details
- 7-6-1 Single-access Communications Commands
- 7-6-2 Multiaccess Communications Commands
- 7-6-3 Modbus Expansion Communications Commands
- 7-6-4 Reader/Writer Control Commands
- 7-6-5 Reader/Writer Setting Commands: Network Settings
- 7-6-6 Reader/Writer Setting Commands: Communications Settings
- 7-6-7 Reader/Writer Setting Commands: Device Settings
- 7-6-8 Maintenance Commands: Device Information
- 7-6-9 Maintenance Commands: Log Information
- 7-6-10 Maintenance Commands: RF Communications Information
7 - 119
7 Modbus/TCP Communications
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-6 V780 Command Details
7
7-6-9 Maintenance Commands: Log 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
Response Formats
• Normal Response
GET MOST RECENT COMMAND ERROR INFORMATION
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 identi-
fier
Protocol identifier Field length Unit
identifier
Function
code
Register address Word count
X X 0000 hex 0006 hex FF hex 03 hex D900 hex 000C hex
Parameter Description
Register address The register address (D900 hex) that specifies reading the most recent command
error information
Word count The number of words in the most recent command error information to read (000C
hex)
Byte-0 Byte-1 Byte-2 Byte-3 Byte-4 Byte-5 Byte-6 Byte-7 Byte-8
Transaction identi-
fier
Protocol identifier Field length Unit
identifier
Function
code
Byte
count
X X 0000 hex 001B hex FF hex 03 hex 18 hex
Byte-9 ... Byte-12 Byte-13 ... Byte-16 Byte-17 Byte-18 Byte-19 Byte-20 Byte-21 Byte-22
Most recent command error information
Time information IP address of the remote
device
Transaction identifier Command code Error code
4 bytes 4 bytes 2 bytes 2 bytes 2 bytes
Byte-23 Byte-24 Byte-25 Byte-26 Byte-27 Byte-28 Byte-29 Byte-30 Byte-31 Byte-32
Most recent command error information
Reserved Attached information 1 Attached information 2
2 bytes 4 bytes 4 bytes
Parameter Description
Byte count The number of bytes in the most recent command error information that
was read (18 hex)
Most recent com-
mand error infor-
mation
Time information Gives the time information in 8-digit hexadecimal
IP address of the
remote device
Gives the IP address that was read in 8-digit hexadecimal.
Example: C0A801C8 hex (192.168.1.200)
Transaction iden-
tifier
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 ?????? (P.9-3)?.
Reserved (Reserved for future use as error device information.)
Attached infor-
mation 1
Gives additional information 1 on the error in 8-digit hexadecimal.
Attached infor-
mation 2
Gives additional information 2 on the error in 8-digit hexadecimal.