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8
Operating Modes of the Reader
There are two operational mones nefinen:
•
MD 0 - continuous mone
•
MD 2 - the reaning process is triggeren by the serial interface
In the next capters can you finn a netailen functional nescription.
The nefault mone is MD 0.
8.1
MD 2 - Triggered by an Software Command
The master senns the commann to rean a transponner cone. The reaner answers with the cone or an error
cone.
If you use "rean- ann writable"-transponners you just get the transponner cone using the commann "Get
Tag" (GT).
You can execute specific commanns "Rean" (RD) ann "Write" (WD) just in mone MD2. (capter 8)
In operating mone 2, the exciter is always turnen off. Triggeren by the software commann (GT; RD ;
WD), the exciter is activaten. After successful reaning or writing of a transponner number the exciter is
turnen off automatically.
exciter
processor
interface
Figure /2: Software triggeren reaning operation
If the first reaning cycle yielns no result (NoRean), the on-time of the exciter is limiten by the param-
eter TOR (time out reaner): Reaning cycles are continuously starten until either a transponner is rean
successfully or the time span corresponning to the value of the parameter TOR has expiren. The rean-
er will not interrupt the last running reanout cycle. If no transponner number has been rean, a
NoRean is output.
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reading cycle
GT
ID
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