BECKHOFF BC8000 - Manual (Page 25)

Appendix
BC8000 25
Appendix
Example: Process image in the bus
terminal controller
An example shows the assignment of in- and output channels to the
process image. The sample construction should consist of the following
assembly of bus terminals:
Position Functional groups on the rail
POS00 Bus terminal controller
POS01 Digital inputs, 2 channels
POS02 Digital inputs, 2 channels
POS03 Digital inputs, 2 channels
POS04 Digital inputs, 2 channels
POS05 Digital inputs, 2 channels
POS06 Digital inputs, 2 channels
POS07 Digital outputs, 2 channels
POS08 Digital outputs, 2 channels
POS09 Digital outputs, 2 channels
POS10 Analogue inputs, 2 channels
POS11 Analogue outputs, 2 channels
POS12 Analogue outputs, 2 channels
POS13 Analogue inputs, 2 channels
POS14 Power feed terminal
POS15 Digital inputs, 2 channels
POS16 Digital inputs, 2 channels
POS17 Digital inputs, 2 channels
POS18 Digital outputs, 2 channels
POS19 Analogue outputs, 2 channels
POS20 KL6001_0020 standard 5 bytes user data
With this configuration, the
bus terminal controller sets
up the following assignment
list
POS21 End terminal
In the BCXXXX bus terminal controllers, all terminals are always assigned
to the PLC, namely in complex evaluation with word alignment. In an
analogue terminal this means 4 input bytes and 4 output bytes per channel.
Controller process
image
Relative byte
address
Bit position
Input Output
Position in
the block
0..7 none %IB0..7 %QB0..7 POS10
8..15 none %IB8..15 %QB8..15 POS11
16..23 none %IB16..23 %QB16..23 POS12
24..31 none %IB24..31 %QB24..31 POS13
32..39 none %IB32..39 %QB32..39 POS19
Portion for byte-oriented
data
40..45 none %IB40..45 %QB40..45 POS20