Siemens Simatic S7-300 - Page 81

Digital modules
3.10 Digital input module SM 321; DI 16 x 24 VDC; with hardware and diagnostic interrupts
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
3-33
Interrupt-triggering channels
The relevant hardware interrupt-triggering channel is registered in the OB40_POINT_ADDR
tag of the start information of OB 40. The figure shows the bit assignments of DWORD 8 in
the local data.
Byte Tag Data type Description
6/7 OB40_MDL_ADDR WORD B#16#0 Address of the interrupt-triggering module
starting
at 8
OB40_POINT_ADDR DWORD see the figure
below
Indication of the interrupt-triggering inputs
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Figure 3-6 Start Information of OB 40: which event has triggered the hardware interrupt
See also
Parameters of SM 321; DI 16 x DC 24 V (Page 3-27)
(6ES7321-7BH01-0AB0)