BECKHOFF BK2000 - Manual (Page 22)

Beckhoff-Lightbus coupler BK2000
22 BK2000
Fundamental
characteristics The medium
of fiber-optic transmission Network topology Ring system, active stations between the wiring sections
technology Medium Z1100 plastic fiber-optic conductor
Z1101 plastic fiber-optic conductor with PU sheath
Z1110 HCS fiber-optic conductor
Z1111 HCS fiber-optic conductor
Number of stations 254 stations in the ring
Max. bus length
with plastic fiber-
optic conductor 0.3 m to 45 m
Min. bending radius 3 cm
with HCS fiber-
optic conductor up to 300 m
Min. bending radius 4 cm
Data transfer rate 2.5 MBit/s
Connectors Z1000 standard connector for plastic fiber-optic conductors
Z1010 standard connector for HCS fiber-optic conductors
It is possible to prepare plastic fiber-optic conductors using usual tools.
Special tools are needed to prepare the HCS conductors. You can obtain
the wiring from us, even ready for assembly, by specifying the length. For
detailed information, please refer to the overview entitled "Fiber-optic
conductors, connectors and accessories" in the "Beckhoff-Lightbus"
catalog or the fiber-optic conductor installation instructions.
A closed ring must be established in one system. The data path begins in
the master and passes through all stations. The return path must end in the
master again.
The plastic fiber-optic cable can be processed without special tools. A
connector can be produced swiftly and reliably using a knife, pliers and
emery paper. The connector engages in the slaves.
Each station in the ring has on "incoming" and a "continuing" Interface.
Swapping of the "incoming" and "continuing" interfaces will not damage
them. In the activated state, the fault can be located easily. The red lit end
of the fiber-optic conductor is plugged into the interface that is not lit.
Configuration of masters As already explained, the Beckhoff-Lightbus coupler creates a data area
with input and output bytes. The bus coupler establishes the affiliations
between channels of the bus terminals and the bits and bytes of the
process image.
The Beckhoff-Lightbus master exchanges a coherent input and output data
block with every Beckhoff-Lightbus coupler, as defined by a CDL. In the
case of the C1200 and the C1220, the affiliations of the bytes from this
data block to the addresses of the process image are established by the
TwinCAT PLC software or S2000 and, in the case of the PLC interfaces,
this is done by the Sxxxx software (xxxx stands for the designation of the
corresponding Cxxxx board). For other masters, use must be made of
corresponding manufacturer tools (please inquire).