BECKHOFF BK5200 - Manual (Page 29)

Appendix
BK52x0 29
Appendix
Example: composition of a process image
in the Bus Coupler
An example shows the assignment of in- and output channels to the
process image. The sample construction is to consist of the following
assembly of Bus Terminals:
Position Functional groups on the rail
POS01 Bus Coupler
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 Analog inputs, 2 channels
POS11 Analog outputs, 2 channels
POS12 Analog outputs, 2 channels
POS13 Analog 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 Digital outputs, 2 channels
POS20 Analog outputs, 2 channels
With this configuration, the
Bus Coupler sets up the
following assignment list
POS21 End terminal
By default, DeviceNet only supports signal channels that are 16 bits
wide. The STATUS/CONTROL BYTE is not available. This means, for
instance, that an analog input terminal with 2 channels appears with 2
x 16 bits in the process image. The images have corresponding
differences with respect to byte addresses and assignments.
Area for byte-oriented data,
analog outputs
Relative byte
address Bit position Controller process
image
Position in the
block
0, 1 none O0, O1 POS11
2, 3 none O2, O3 POS11
4, 5 none O4, O5 POS12
6, 7, none O6, O7 POS12
8, 9 none O8, O9 POS20
10, 11 none O10, O11 POS20