INTERRUPTS via signal
lines of the S5 bus
Interrupt-driven program execution means that an S5 bus signal from
an I/O module with interrupt capability (e.g. digital inputs, IPs, CPs)
causes the CPU to interrupt program execution and to process a
specific section of program.
Note
If you want to use interrupt-driven program execution via S5 bus
signal lines on your CPU, you must set "process interrupts via IB 0
= off" in DX 0 and activate the individual interrupts by means of
DX 0 parameters. The interrupts must also be enabled with
jumpers on the module (refer to the Appendix and /2/). In contrast
to the CPU 946/947, you can set "interrupt at block boundaries" or
"interrupt at operation boundaries" as the mode in DX 0.
Jumper settings for system
interrupts
For interrupt-driven program execution with the CPU 948, there are
four system interrupts available to you:
- INT A/B/C/D (dependent on the slot in the CPU, see the System
Manual (Further Reading /2/)),
- INT E
- INT F
and
- INT G.
The interrupts you want to use must be enabled with the supplied
jumpers. The jumper plug is located on the basic board above the
receptacle for the memory card. The exact position can be seen in
Appendix 1.
RUN Mode
CPU 948 Programming Guide
C79000-G8576-C848-04
4 - 43
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