Command Identifier 0X56: Read Rssi (Receive Signal Strength Indicator) - Balluff BIS U-4A7-082-01C-07-S4 Betriebsanleitung

BIS U-4A7-082- _1C-07-S4
Industrial RFID system - Read/write head
8
System integration (continued)
8.7.14 Command identifier 0x56: Read RSSI (Receive
Signal Strength Indicator)
Returns the RSSI of a data carrier previously selected with
the Select command. The RSSI is a value proportional to
the signal strength of the received response signal of the
data carrier.
Command:
Subaddress Meaning
0x00 1st bit string
0x01 Command
recognition
0x02 RSSI Type
... None
0x1F 2nd bit
string
The RSSI value is returned in the form of an I and a Q
component as a power level measured in dBm. In most
cases it is sufficient to consider the component with the
higher value.
Subaddress Meaning
0x00 1st bit string
0x01 I-value
0x02 Q-value
... None
0x1F 2nd bit
string
or
Input buffer: Status message
Subaddress Meaning
0x00 1st bit string
0x01 Status code
... None
0x1F 2nd bit string If the 1st and 2nd bit
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Functional description
0x56: Get RSSI
0: Real-Time RSSI
1: Pilot tone RSSI
2: Data RSSI
No meaning
If the 1st and 2nd bit
strings match, valid data is
present.
Functional description
−40...−90
−40...−90
No meaning
If the 1st and 2nd bit
strings match, valid data is
present.
Functional description
Provides information about
the status of a request.
No meaning
strings match, valid data is
present.
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