Access from the user program
KL5121
25
Version: 3.1.0
5
Access from the user program
5.1
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.
Fig. 12: 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.
Summary of Contents for KL5121
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