User's Manual

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7 Modbus/TCP Communications
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-6 V780 Command Details
7
7-6-10 Maintenance Commands: RF Communications Information
 Function
This command gets the most recent communications diagnostic information.
 Command Format
 Response Formats
• Normal Response
GET COMMUNICATIONS DIAGNOSTIC 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 DC00 hex 002E hex
Parameter Description
Register address The register address (DC00 hex) for reading the communications diagnostic infor-
mation
Word count The number of words in the communications diagnostic information to read (002E
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 005F hex FF hex 03 hex 5C hex
Byte-9 ... Byte-88
Most recent communications
diagnostic information
92 bytes
Byte-9 ... Byte-12 Byte-13 Byte-14 Byte-15 Byte-16 Byte-17 Byte-18 Byte-19 Byte-20
Communications diagnostic information
Time information Command code Error code Diagnostic results Detailed diagnos-
tic results
4 bytes 2 bytes 2 bytes 2 bytes 2 bytes
Byte-21 Byte-22 Byte-23 Byte-24 Byte-25 Byte-26 Byte-27 Byte-28 Byte-29 Byte-30 Byte-31 Byte-32
Communications diagnostic information
Reserved 1 Reserved 2 Reserved 3 Reserved 4 Reception level Noise level
2 bytes 2 bytes 2 bytes 2 bytes 2 bytes 2 bytes
Byte-33 Byte-34 Byte-35 Byte-36 Byte-37 Byte-38 Byte-39 ... Byte-100
Communications diagnostic information
Reserved 5 Reserved 6 Stored PC EPC code
2 bytes 2 bytes 2 bytes 62 bytes