Response Format For Error Completion - Omron V780 Series User Manual

7-2-3

Response Format for Error Completion

Byte-0 Byte-1
Transaction identifier
XXXX hex
X: Any value
Transaction Identifier
The value that was specified in the command is set.
Protocol Identifier
This field is always 0000 hex.
Field Length
This field is always 0003 hex.
Unit Identifier
This field is always FF hex.
Function Code
The value of the function code that was specified in the command plus 80 hex is set.
Exception Code
A code that provides information on the error is set.
You can use the error code to identify the error that was detected by the Reader/Writer. The exception
code and error code are related as given below. Refer to the most recent command error information or
command error log to check details on the error using the error code.
Exception
code
01 hex Illegal function
02 hex Illegal data address
03 hex Illegal data value
UHF RFID System V780-series Reader/Writer User's Manual (Z389)
Byte-2 Byte-3
Protocol identifier
Always 0000 hex.
Exception code meaning
7 Modbus/TCP Communications
Byte-4 Byte-5 Byte-6
Unit identi-
Field length
Always FF
Always 0003 hex.
Range included in the field length.
V780 error code
1001 hex Frame length error
1002 hex Frame header error
1003 hex Unknown command error
1004 hex Command format error
1005 hex Command parameter error
Byte-7 Byte-8
Function Exception
fier code code
83 hex, 90
hex, or E4 XX hex
hex.
hex
7
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