BK7150 - Introduction

Fig.1: BK7150 - Bus Coupler for CC-Link

The Compact Bus Couplers BK7150 connects the CC-Link system to the electronic terminal blocks, which can be extended in modular fashion. One unit consists of the Bus Coupler, any number of up to 64 terminals and one end terminal. The K-bus extension technology allows for the connection to one Bus Coupler of up to 255 Bus Terminal spatially distributed.

The Bus Coupler recognizes the connected terminals and automatically generates the affiliations of the inputs/outputs to the bytes of the process image. The first input/output signal is inserted in the first bit of one byte (LSB), beginning from the left. The Bus Coupler inserts further signals in this byte. Inputs and outputs are clearly separated. The Bus Coupler automatically begins a further byte if the number of controller inputs or outputs exceeds 8 bits.

CC-Link is an open fieldbus system. Baud rates up to 10 Mbaud can be selected via a switch, so that the transfer speed can be adapted to the requirement of the technical process.

Complex signal processing for analog I/Os, position measurement, …

The BK7150 Bus Coupler supports the operation of all Bus Terminals. As far as the user is concerned, handling of the analog inputs/outputs is no different to other series. The information is available in the process image of the controller for processing in the form of a byte-array.

The analog and multi-functional Bus Terminals can be adapted to each specific application using the KS2000 configuration set. Depending on the type, the analog Bus Terminals registers contain temperature ranges, gain values and linearization characteristics. Using the KS2000 software, the required parameters can be set on a PC. The Bus Terminal stores settings permanently and in a fail safe manner.

Optionally, the Bus Terminals can also be controlled by the control system. Via function blocks (FBs), the Programmable Logic Controller (PLC) or the Industrial PC (IPC) handles configuration of the complete periphery during the start up phase. If required, the controller can upload the decentrally created configuration data in order to centrally manage and store this data. Therefore, new adjustments are not necessary in the event of replacement of a Bus Terminal. The controller carries out the desired setting automatically after switching on.