Balluff BIS U-6127-081-1 4-06-ST36 Betriebsanleitung Seite 238

BIS U-6127-081-1_4-06-ST36
Processor unit
7
Startup and operation (continued)
Max. write length
Parameter-ID: 000D
hex
UHF-Manager: Menu: Device settings > Parameters...
> Air interface
OPC UA: –
Webserver: Menu: Configuration > RFID > Basic
UHF
The Max. write length defines the maximum number of
data words (16 bits) that can be transferred with a
BlockWrite command.
1 to 255 data words can be transferred, whereby the
setting of 0 or 1 corresponds to an ordinary write
command.
Adjustable values:
Length Permissi-
[bits] ble values
8 1...255
In a heavily electromagnetically stressed envi-
ronment, better results may be achieved if fewer
data words are transmitted in a command.
Max. read length
Parameter-ID: 000E
hex
UHF-Manager: Menu: Device settings > Parameters...
> Air interface
OPC UA: –
Webserver: Menu: Configuration > RFID > Basic
UHF
The Max. read length defines the maximum number of
data words (16 bits) that are transferred from the data
carrier to the processor unit with a read command.
Adjustable values
Length Permissi-
[bits] ble values
8 1...255
In a heavily electromagnetically stressed envi-
ronment, better results may be achieved if fewer
data words are transmitted in a command.
62 english
Factory Meaning
setting
16 Number of data
(16 words words when
(32 bytes)) writing with
BlockWrite
Factory Meaning
setting
16 Number of data
(16 words words when
(32 bytes)) reading from the
data carrier
Loop filter
UHF RFID technology works with electromagnetic waves
that are emitted via antennas for communication between
the data carrier and the processor unit. These waves are
reflected by metallic objects, walls and floors, which can
cause undesirable side effects (cancellations or
amplifications). For example, data carriers that are further
away or data carriers that have already left the reading
point may be detected inadvertently.
The MinReads, MinNoReads and WaitTime parameters
can be used to define a loop filter which, in the
operating mode, specifies the
a
SynchRonouS detection
criteria according to which a tag is reported as c
( ) or as g ( ) and the time interval after
detected oeS aBSent
which a tag reported as g
oeS
be used to prevent data carriers that have already been
detected from being detected again by mistake or to
prevent the detection of unwanted data carriers that only
respond sporadically.
MinReads or AsyncObserved threshold (default)
Parameter-ID: 0023
hex
UHF-Manager: Menu: Device settings > Parameters...
> Read-Write
OPC UA: SetASyncFilter/GetASyncFilter methods
Webserver: Menu: Configuration > RFID > Filter
options
The MinReads (default) parameter defines how often a
data carrier must be detected so that it is reported as
c . This value is set after switching on or restarting the
omeS
processor unit.
If a data carrier is to be detected twice in succession, for
example, before it is reported as c
the parameter value.
Adjustable values:
Length Permissi- Factory
[bits] ble values setting
8 1...255 1
omeS
can be re-detected. This can
, 2 must be set as
omeS
Meaning
Required
detections to
report a data
carrier as
Comes.