Error Response Reception Procedure - Omron V780 Series User Manual

Precautions for Correct Use
Access to a Reader/Writer is possible from only one host device at a time.
If a host device B connects to a Reader/Writer while another host device A is already con-
nected to it, the connection between host device A and the Reader/Writer will be automatically
disconnected and a connection with host device B will be established.
7-4-2

Error Response Reception Procedure

If an error response is received, you can check the most recent command error information or com-
mand error log in the Reader/Writer to get details on the nature of the error. An error has occurred if the
function code in the response that was returned from the Reader/Writer is 80 hex higher than the func-
tion code in the query.
You can do this by sending a GET MOST RECENT ERROR INFORMATION command or GET COM-
MAND ERROR LOG command from the host device or by using the Web browser interface through the
Web browser interface.
Host device
(client)
Error
detected.
GET MOST RECENT ERROR
INFORMATION command sent.
(Or, GET COMMAND ERROR LOG command sent.)
Error information returned.
UHF RFID System V780-series Reader/Writer User's Manual (Z389)
Reader/Writer
(server)
Command sent.
occurs.
Response returned.
Function code + 80 hex
7 Modbus/TCP Communications
Error
7
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