V750-series UHF RFID System User's Manual - PLCeasy

(3) Read Data (RDDT)
Command
Response
*(S) Space Character
RDDT(S)MemoryBank(S)DataPointer(S)DataLength(S)[options...]
MemoryBank: Memory Bank
DataPointer: Data Pointer
DataLength: Data Length
RDDT[RC](S)[CNT](S)[Data1 with ITM1]
[RC]: Response Code
[CNT]: Tag Count
[Data with ITM]: Data with Items indicated by TIF option. Items are delimited by a
comma.
Example 1) When [Memory bank; 0, Start address(=Data pointer); 0, word count to be read(=Data length); 1] is
specified, other settings are default value and then read process has completed successfully:
[Tx] RDDT 0 0 1
[Rx] RDDT0000 001 1234
Example 2) When [Memory bank; 1, Start address(=Data pointer); 0, word count to be read(=Data length); 8] is
specified, other settings are default value and then read process has completed successfully:
[Tx] RDDT 1 0 4
[Rx] RDDT0000 001 BCAD300055555555
Example 3) When [Memory bank; 1, Start address(=Data pointer); 2, word count to be read(=Data length);
3, Antenna; 1 to 3, Tag information; EPC and antenna id] is specified and read process has
succeeded:
[Tx] RDDT 1 2 3 -ant 123 -tif EPC,ANT
[Rx] RDDT0000 001 111122223333,1234567890ABCDEF12345678,2
* In this case, the read data is [111122223333], the tag EPC code is [1234567890ABCDEF12345678],
and the read antenna ID is [2].
Example 4) When indicated address can not supported:
[Tx] RDDT 0 0 8
[Rx] RDDT0000 000
* No count data is returned.
Example 4) When an incorrect address[1000] is specified:
[Tx] RDDT 0 1000 1 -ant 123
[Rx] RDDT1412
* The command data error [Code:1412] is returned.
Example 5) When an error has occurred during communication process:
[Tx] RDDT 0 0 1 -ant 123
[Rx] RDDT7012
* The error code [Code:7012 (in this case)] is returned.
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