Sensormatic View Manager 96 Console Guía de instalación descargar pdf (Pagina 161)

Appendix A RFID Device Adapter Reference 161

Additional Properties Information for SAMSys

Reader

■ communicationTimeout – This property is used exclusively for all commands

and responses on the device, except tag read commands and the respective

responses. The property defines the inactivity threshold for reader responses.

Performance can be highly dependent on this property, therefore reduce it from

the default value of 10000 msec (10 seconds). You can start with a value of

1500msec, and make further reductions after observing deployment-specific

performance. Observe the read performance with log levels set to FINEST. For

more information, refer to

TABLE 2-4.

Both the communicationTimeout and observationSetTimeout properties

are used for detecting responses to the read command. The

communicationTimeout property is used for the initial response, while

observationSetTimeout is used for all subsequent observation responses.

communicationTimeout behaves this way for all other commands.

The observationSetTimeout property sets the inactivity threshold for

signalling that an observation set has completed. Default is 100 msec. This value

can be reduced after observing deployment-specific performance.

■ enableCommandResponseCRC – Specifies the Command Response Cyclic

Redundancy Check (CRC). Each command response received from the reader is

provided with a CRC checksum. The SAMSysAdapter enables you to verify that

the command response arrived without any transmission error. Alternatively, this

check can be omitted. This property is used to establish whether these checks are

performed. The valid values are true and false.

■ enableTagReadResponseCRC – Specifies the Response Cyclic Redundancy

Check (CRC). Each reported tag observation sent from the reader is provided

with a CRC checksum. The SAMSysAdapter enables you to verify that the

transmitted tag data arrived without any transmission error. Alternatively, this

check can be omitted to achieve greater system throughput. This property is used

to establish whether these checks are performed. The valid values are true and

false.

■ scanDuration – The SAMsys reader does not offer the ability to poll for a

specified duration as some other reader devices do. The adapter for the SAMSys

reader emulates this capability. The adapter waits for the end of transmission

from the reader (which could exceed the specified value) and dwells for the

remaining time if the elapsed time is less than the value specified in the

scanDuration property.

■ protocol – The SAMSys reader supports reading a number of different RFID

tags. The value of this property specifies the types being used during data

capture. The default is ALL. Multiple property definitions can be combined by

using a comma-separated list.The following protocols have been tested:

■ For ISO 18000-6A, the value is IS186A.

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