Omron V780 Series, Руководство пользователя

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7 Modbus/TCP Communications
7 - 48 UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
 Function
This command reads the IDs (UIIs (EPC codes)) of multiple RF Tags in the communications range.
You can get the IDs (UIIs (EPC codes)) of more than one RF Tag with one EXTENDED MULTIAC-
CESS ID READ command.
 Command Format
 Response Formats
• Normal Response or Error Response: RF Tag Communications Error
EXTENDED MULTIACCESS ID READ
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
Subfunction code Options
X X 0000 hex 0006 hex FF hex 64 hex 0003 hex 2 bytes
Parameter Description
Subfunction code 0003 hex: EXTENDED MULTIACCESS ID READ
Options For details, refer to 7-3 RF Communications Command Options on page 7-10.
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
Subfunction code Number of RF
Tags (m)
X X 0000 hex 2 bytes FF hex 64 hex 0003 hex 0000 to 0040 hex
Byte-12 ...
Byte-12 +
n - 1
...
Byte-12+n
*(m-1)
...
Byte-12+(
n*m)-1
Information from RF Tag 1 ... Information from RF Tag m
n = 66 to 70 bytes ... n = 66 to 70 bytes
Information from RF Tag x
Error code StoredPC UII (EPC code) Options
Reception level Reader/Writer Number
2 bytes 2 bytes 62 bytes 2 bytes 2 bytes
Parameter Description
Field length 0048 to 0F86 hex + (Option size × m)
• For details on option sizes, refer to
7-3 RF Communications Com-
mand Options on page 7-10.
Number of RF Tags Gives the number of RF Tags that were detected in 4-digit decimal.
0000 to 0040 hex (0 to 64)