BECKHOFF BK3xx0 - Manual (Page 45)

Notes on the Documentation
Fieldbus Components 43
Configuration of the BK3120 module with digital
inputs/outputs only
Example 1:
1 x BK3120
10 x KL1xx4
1 x KL9100 (is not entered, as this Bus Terminal is entirely passive)
11 x KL2xx4
1 x KL9010 (is not entered, as this Bus Terminal is entirely passive)
The sum total of digital bytes must be added together and entered.
Digital inputs
10 x KL1xx4, i.e. 10 x 4 bits = 40 bits
40 bits / 8 = 5 bytes, i.e. 5 x 8 bits entered or 1 x 40 bits or 1 x 8 bits + 1 x 32 bits etc. (see Fig. 2 and Fig. 3)
Digital outputs
11 x KL2xx4, i.e. 10 x 4 bits = 44 bits
44 bits / 8 = 5.5 bytes - rounded up to 6 bytes, i.e. 6 x 8 bits entered or 1 x 48 bits or 1 x 8 bits + 1 x 40 bits etc. (see
Fig. 2 and Fig. 3)
Fig. 2: Example of the entry of individual bytes. Note: Each individual byte requires one byte of ConfigData. In the
BK3120 a maximum of 64 bytes of configuration data is available.