KL5121 –Terminal configuration

Each terminal channel is mapped in the Bus Coupler. Depending on the type of the Bus Coupler and the mapping configuration (e.g. Motorola/Intel format, word alignment etc.) the terminal data are mapped in different ways to the Bus Coupler memory.
In contrast to analog input and output terminals, the KL5121 always also maps the control and status byte, independently of the higher-level fieldbus system.

BK2000 Lightbus Coupler

With the BK2000 Lightbus Coupler, the control/status byte is always mapped in addition to the data bytes (i.e. for all analog terminals). This is always in the low byte on the offset address of the terminal channel.

KL5121 –Terminal configuration 1:
Mapping for Lightbus Coupler - sample KL5121

BK3000 PROFIBUS Coupler

In the BK3000 Profibus coupler, the KL5121 is always mapped with 6 bytes of input data and 6 bytes of output data.

KL5121 –Terminal configuration 2:
Mapping for Profibus Coupler - example for KL5121

BK4000 Interbus Coupler

The BK4000 Interbus Coupler normally maps the KL5121 with 6 bytes of input data and 6 bytes of output data.

KL5121 –Terminal configuration 3:
Mapping for Interbus Coupler - sample for KL5121

Other Bus Couplers and further information

Further information about the mapping configuration of Bus Couplers can be found in the Appendix of the respective Bus Coupler manual under Master configuration.

The chapter on Mapping in the Bus Coupler contains an overview of possible mapping configurations, depending on the configurable parameters.

KL5121 –Terminal configuration 4:

Parameterization with KS2000

The KS2000 configuration software can be used for parameterizations via the serial interface of the Bus Coupler, independent of the fieldbus system.