BECKHOFF BK4000 - Manual (Page 23)

InterBus coupler BK4000 in InterBus S
BK4000 23
Configuration of masters
As already explained above, the InterBus coupler creates a data area with
input and output bytes. The affiliations between channels of the bus termi-
nal and the bits and bytes of the process image are set by the bus coupler.
The InterBus master exchanges a coherent input and output data block
with each InterBus coupler. The affiliations of the bytes from this data block
to the addresses of the process image are established via data blocks of
the PLC or the IBS SYS SWT or IBS CMD SWT G3 and G4 configuraton
software from Phoenix Contact. For other masters, use the manufacturer’s
corresponding tools.
Master configuration
Master / software Configuration software Manufacturer
software PLC-Interfaces
versions < 4 IBS SYS SWT
IBS CMD SWT G3 Phoenix Contact
PC interface
version < 4 IBS SYS SWT
IBS CMD SWT G3 Phoenix Contact
PLC-interfaces
versions >4 IBS CMD SWT G4 Phoenix Contact
PC interfaces
versions >4 IBS CMD SWT G4 Phoenix Contact
Ensuring data consistency
Consistency of a station’s data is ensured by the data transfer protocol of
the InterBus. Consistency throughout the entire process image is ensured
by sychronous sampling.
Asynchronous access by the controller’s CPU ( mostly PLC) to the data
area of the InterBus master may lead to inconsistencies. Most InterBus
masters ensure access to 16-bit words and, to some extent, also to 32-bit
double words. Please refer to the corresponding manufacturer’s manuals
for further details of special access methods relating to the master inter-
faces.
The S5 modules IBS S5 DCB and IBS S5 DSC as InterBus masters are
common PLC interfaces.
The masters featuring firmware version 4.0 are particularly convenient to
operate. The CMD configuration software allows users to define the set-
tings under Windows. Byte-by-byte and also bit-by-bit allocation of the pe-
ripheral data in the controller’s address area is possible. Data consisten-
cies can be selected in groups.
Conformity with the
InterBus standard The BK4xxx operate with the SUPI 3 (Serial Universal Peripheral Interface)
protocol chip. The SUPI 3 protocol chip handles the complete InterBus
protocol. In comparison with the predecessor versions (SUPI 2), the SUPI
3 offers extended diagnostic and error management. Please refer to the
manuals of the Interbus masters used for details of the supported functio-
nalities of the SUPI 3 chips.