Balluff BIS U-6127-081-1 4-06-ST36 Betriebsanleitung Seite 235

BIS U-6127-081-1_4-06-ST36
Processor unit
7
Startup and operation (continued)
Automatic increase of transmitting power on write
Parameter-ID: 0009
hex
UHF-Manager: Menu: Device settings > Parameters...
> Transmitting power
OPC UA: –
Webserver: Menu: Configuration > RFID > Anten-
nas & power
This parameter can be used to specify whether the same
transmitting power is used for write and read operations or
whether the transmitting power is increased by an offset
value for write operations. Many data carriers require a
higher transmitting power for write operations than for read
operations.
Write power (dBm) = Read power (dBm) + Offset (dB)
The desired offset power in quarter dB is transferred as the
parameter value.
Adjustable offset power:
Length Permissible Factory
[bits] values setting
8 0...80 8 (2 dB
(~factor 1.6))
The resulting transmitting power is automatically limited to
the maximum permissible value.
The maximum permissible transmitting power
(ERP/EIRP) depends on nationally applicable
regulations. Information on the maximum
permitted transmitting power can be found in
the information sheet on conformity and appro-
vals. The device ensures compliance if the
correct data of the antennas and cables used
have been set.
Active channels
Parameter-ID: 000B
hex
UHF-Manager: Menu: Device settings > Parameters...
> Basic UHF
OPC UA: –
Webserver: Menu: Configuration > RFID > Basic
UHF
The Active channels parameter can be used to define
which frequencies or channels are used for communication
with the data carrier. The setting is global for all sessions.
www.balluff.com
0...20 dB (corresponds to
factor 1...100)
Meaning
Offset power in
¼ dB
The active channels setting is available only for
devices that operate according to the European
Union standard or a form derived from it.
Further information can be found in the Euro-
pean standard ETSI EN 302 208 or derived
national standards.
The following ETSI channels can be used:
ETSI channel
4
7
10
13
When using 2...4 channels, these are actuated one after
the other via a frequency hopping procedure.
Individual channels can be activated (1) or deactivated (0)
via a bit mask.
Example:
Channel Bit 7...Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Byte
assign-
ment
4 and 10
0 0
activated,
7 and 13
deactiva-
ted
Adjustable values:
Length Permissi- Factory
[bits] ble values setting
8 Bitmask 0F
hex
0F ...00 All channels
hex hex
on
– If only a single channel is active, there may be
delays in detection, since a single channel
may not be in operation continuously. As of
2 channels or more, this problem no longer
exists.
– For static applications, the frequency hopping
method can be advantageous, since local
field minimums can be masked by the
frequency change.
– If several processor units are in operation
simultaneously in a confined space, mutual
interference may occur if they operate on the
same channels. In this case, it is
recommended to operate the processor units
on different and distant channels,
e.g. processor unit 1 on channel 4 and
processor unit 2 on channel 13.
Frequency [MHz]
865.7
866.3
866.9
867.5
1 0 1 05
hex
Meaning
Bit 0: Channel 4
Bit 1: Channel 7
Bit 2: Channel 10
Bit 3: Channel 13
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