A.9.2.5 Hardware interrupts
Hardware interrupts
A hardware interrupt is generated for the following event:
● Comparison event for DQ occurred
Structure of the additional interrupt information
The hardware interrupt can only be triggered in "Counter" operating mode.
Name of the data block Contents Remark Bytes
USI (User Structure Identi‐
fier)
W#16#0001
or
W#16#0010
Additional interrupt information for hardware in‐
terrupts of the CFU
2
The channel that triggered the hardware interrupt is shown.
Channel B#16#00 to
B#16#0F
Number of the channel that triggered the hard‐
ware interrupt.
1
An error event that triggered the hardware interrupt follows.
Event B#16#05 Comparison event for DQ occurred 1
A.9.2.6 Supplementary information on the address space of a CFU
The input and output address space (user data + PROFINET user data qualifier) of the CFU is
1440 bytes in each case. However, only 1000 bytes are available in each case in S2 mode or
with use of CiR.
Each submodule also allocates 1 byte in addition to the process data in the input and output
address space for the user data qualifier (IOXS).
Table A-19 Submodule dependency of the bytes in the input and output address space
Submodule has… Allocated bytes in the input address
space
Allocated bytes in the output ad‐
dress space
Diagnostics address 1 1
Input address with x bytes of process data x+1 1
Output address with x bytes of process data 1 x+1
Input and output address with x bytes of process
data in each case
x+1 x+1
Appendix
A.9 Drivers, parameters, diagnostic messages and address space
SIMATIC CFU
200 Commissioning Manual, 08/2019, A5E39252870-AD
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