Omron V780 Series User Manual page 192

7 Modbus/TCP Communications
 Execution Examples
Specifying to the Reader/Writer a Multiaccess Data Read of Four Words Starting from Word Address
0123 Hex (User Area) with No Options
Example 1: Execution when an RF Tag Is in the Communications Range
TX: 00000000000DFF109200000306312300040000
RX: 000000000004FF100003
Example 2: Execution When an RF Tag Is Not in the Communications Range (Exception Code: 04
Hex (Failure in Device))
TX: 00000000000DFF109200000306312300040000
RX: 000000000003FF9004
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UHF RFID System V780-series Reader/Writer User's Manual (Z389)