Command Identifier 0X55: Number Of Data Carriers - 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)
8.7.13 Command identifier 0x55: Number of data
carriers
Detects the data carriers that are within the detection
range of the antenna and returns the number of detected
data carriers. With the data carrier selection, either all or
only selected data carriers can be detected.
Command:
Subaddress Meaning
0x00 1st bit string
0x01 Command
recognition
0x02 Data carrier
selection
... None
0x1F 2nd bit
string
If execution is successful, the response is passed to the
input buffer in the following format:
Response:
Subaddress Meaning
0x00 1st bit string
0x01 Number of
data carriers
read
... None
0x1F 2nd bit
string
If no tag is identified, this command returns the number "0"
and no error message.
or
Input buffer: Status message
Subaddress Meaning
0x00 1st bit string
0x01 Status code
... None
0x1F 2nd bit
string
56 english
Functional description
0x55: Return number of
tags.
All = 0/Selected = 1
No meaning
If the 1st and 2nd bit
strings match, valid data is
present.
Functional description
0...255
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
If the 1st and 2nd bit
strings match, valid data is
present.