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Appendix
Appendix
For this configuration
the bus coupler will create
the list of assignments
shown below
Area for byte-oriented
data, analog outputs
22
Sample arrangement of a process image in
the bus coupler
The following example will illustrate the assignment of input/output
channels to the process image. Our sample construction is to consist of the
following bus terminal components:
Position
Function component on the track
POS01
Bus coupler
POS02
2-channel digital input
POS03
2-channel digital input
POS04
2-channel digital input
POS05
2-channel digital input
POS06
2-channel digital input
POS07
2-channel digital output
POS08
2-channel digital output
POS09
2-channel digital output
POS10
2-channel analog input
POS11
2-channel analog output
POS12
2-channel analog output
POS13
2-channel analog input
POS14
Power input terminal
POS15
2-channel digital input
POS16
2-channel digital input
POS17
2-channel digital input
POS18
2-channel digital output
POS19
2-channel digital output
POS20
2-channel analog output
POS21
End terminal
In the default settings, RS485, RS232, CANopen, DevicNet, InterBus and
Profibus couplers only map the analog input/output terminals in 16-bit wide
signal channels. The CONTROL/STATUS byte is not available. That is to
say, an analog terminal with two channels, for example, appears with two
times 16 bits in the process image. The PLC interface is not integrated in
the process image. Accordingly, the byte address and allocation mappings
present themselves differently when CONTROL/STATUS is activated. For
the function and system terminals, refer to the terminals' configuration
instructions for details of the mapping in the bus coupler process image.
Relative byte
Bit position
address
0, 1
none
2, 3
none
4, 5
none
6, 7,
none
8, 9
none
10, 11
none
Process image in
Position in the
the control unit
block
O0, O1
POS11
O2, O3
POS11
O4, O5
POS12
O6, O7
POS12
O8, O9
POS20
O10, O11
POS20
BK8000
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