Balluff BIS M-408-082-401-07-S4, Руководство по настройке, Страница: 88 / 128

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4
Primary Device Functions (continued)
4.5 RFID Information
4.5.1 Description
The RFID information provides an additional information
about the state of the RFID system.
4.5.2 ISDU
Name Index Subindex Access Length Data Type Data
Storage
Default
RFID
information
0x007F (127) 0 R 1 byte Record n.a. –
RSSI 1 R 1 byte UINT8 n.a. –
Tab. 4-5: RFID Information – ISDU
RSSI
The RSSI (Radio Signal Strength Indicator) is a unitless,
relative value between 0 and 100. A higher value signals a
better signal strength of the response from the data carrier
and is influenced by the positioning from the data carrier to
the read/write head and by soiling that affects the RF field
(e.g. metal filings).
The value can be used during startup to optimize the
alignment of the read/write head to the data carrier.
Monitoring this value against the same value at the time of
startup can allow early detection of degradation.
BIS M-4 _ _ -082-401-07-…
Industrial RFID-System BIS M