Configuration manual Reader
16
Modifications, misprints and errors excepted.
English
2.
Description of the configuration parameters
2.4.11.
“ForcePowerOffAfterEPCWrite”
Characteristics:
available from firmware:
v1.40.00
Data type:
Byte (8-bit)
Unit:
milliseconds
Value range:
0-255
Description:
During the inventory process a tag transmits its EPC and a checksum to the reader. This checksum is formed when
the tag is “Powered up” from the memory area of the EPC. If now a write command changes the EPC and a new
inventory is started without any intervening “Power up” – i.e. without switching off the antenna field, the tag cannot
participate in the inventory, because the checksum it communicates no longer matches the EPC it transmits.
This configuration parameter specifies whether and for how long after a write operation to the memory bank of the EPC
the carrier should be switched off so as to “repower” the tag.
Note
See also the “EPCglobal Class 1 Generation 2 UHF RFID” ((E)) specification V1.2.0 section 6.3.2.1.2.1 (page 38).
2.4.12.
“TransmitGetEPCsPreSelect”
Characteristics:
available from firmware:
v1.41.00
Data type:
Bool (8-bit)
Unit:
–
Value range:
0; 255
Description:
The content of this configuration parameter affects only the protocol commands “SyncGetEPCs”,
“SyncBulkGetEPCs”, “ASyncGetRawEPCs” and “ASyncGetEPCs”. All other protocol commands behave as if
“TransmitGetEPCsPreSelect” is zero. Depending on the value of this configuration parameter, an inventory runs
as follows:
•
“TransmitGetEPCsPreSelect” is zero:
1.
the first antenna is selected from the multiplex list
2.
a Select to reset all tags within the reception range of the selected antenna is executed
3.
an inventory is executed by the selected antenna, until no further tags are found
4.
as long as there remain further antennas in the multiplex list, the next antenna is selected and the process
resumes at point 2
5.
the protocol command is completed and the result is transferred to the higher level
•
“TransmitGetEPCsPreSelect” is not equal to zero:
1.
the first antenna is selected from the multiplex list
2.
a Select to reset all tags within the reception range of the selected antenna is executed
3.
as long as there remain further antennas in the multiplex list, the next antenna is selected and the process
resumes at point 2
4.
the first antenna is selected from the multiplex list
5.
an inventory is executed by the selected antenna, until no further tags are found
6.
as long as there remain further antennas in the multiplex list, the next antenna is selected and the process
resumes at point 5
7.
the protocol command is completed and the result is transferred to the higher level