BECKHOFF BK3xx0 - Manual (Page 47)

Notes on the Documentation
Fieldbus Components 45
Configuration of the BK3120 module with complex and digital
input/outputs
Byte-oriented modules are the first to be mapped into the process image, and for this reason all the complex modules
must first be entered in the sequence in which they are plugged into the Bus Coupler. For some byte-oriented Bus
Terminals, it is possible to distinguish between compact and complex mapping.
Compact - only user data
Complex - user data plus status (for extended diagnosis) and control (for register communication)
Finally the digital signals are entered and rounded up to a whole byte.
Example 2.a:
1 x BK3120
2 x KL1012
1 x KL2022
1 x KL3312 compact mapping
1 x KL9010
Fig. 2a: Example of the KL3312 compact Bus Terminal
Example 2.b:
1 x BK3120
2 x KL1012
1 x KL2022
1 x KL3312 complex mapping
1 x KL9010