Balluff BIS U-6127-081-1 4-06-ST36 Betriebsanleitung Seite 250

BIS U-6127-081-1_4-06-ST36
Processor unit
7
Startup and operation (continued)
Active antennas
Parameter-ID: 0012
hex
UHF-Manager: Menu: Device settings > Parameters...
> Basic UHF
OPC UA: AntennaActive variable
Webserver: Menu: Configuration > RFID > Basic
UHF
The global parameter Active antennas can be used to
specify which of the four antennas are to be activated or
deactivated. The parameter is stored permanently and
retains its value even after a restart of the processor unit.
The individual antennas can be activated (1) or deactivated
(0) via a bit mask.
Example:
Active Bit 7...Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Byte
antennas
1 and 3 0
activated,
2 and 4
deactiva-
ted
Adjustable values:
Length Permissi-
[bits] ble values
8 Bitmask
0F ...00
hex hex
The processor unit has a port monitoring func-
tion which can be used to detect whether an
antenna is connected to an active antenna port.
If no antenna is connected or if there is a cable
break, a cable break message is output (see
chapter 7.4 on page 85).
74 english
0 1 0 1 05
Factory Meaning
setting
0F Bit 0: Antenna 1
hex
All antennas Bit 1: Antenna 2
on Bit 2: Antenna 3
Bit 3: Antenna 4
Antenna gain
Parameter-ID: 0013
UHF-Manager: Menu: Device settings > Parameters...
> Transmitting power
OPC UA: –
Webserver: Menu: Configuration > RFID > Anten-
nas & power
The antenna gain is a physical property of the antenna that
describes how much of the supplied transmitting power is
radiated in the main beam direction. The antenna gain thus
describes the efficiency and directionality of the antenna.
Depending on the manufacturer of the antenna, the
antenna gain is specified differently in the data sheet.
Unit Abbrevia-
tion
dBi G
i
dBiC G
hex
iC
dBd G
D
The antenna gain parameter is defined as antenna gain in
relation to a half-wave dipole (GD).
Depending on the data sheet specification, a conversion to
dBd may be necessary:
Data sheet specification
G (dB )
i i
G (dB )
iC iC
The parameter value is the antenna gain G
Parameter value
=
Adjustable values:
Length Permissible
[bits] values
8 −400...+400
The parameter should be updated when the
type of antenna used changes.
hex
Meaning
Antenna gain (linear) related to
an isotropic radiator
Antenna gain GC (circular)
related to an isotropic radiator
Antenna gain related to a
half-wave dipole
Conversion to G
D
G = G – 2.15 dB
D i
G = G – 5.15 dB
D i
in dB/20.
D
G [dBd]
D
0.05 dB
Factory Meaning
setting
67 (corre- Antenna
sponds to gain G in
D
3.35 dBd or dB/20 steps
5.5 dBi)