Process interrupt
processing
There is an interrupt line in the PLC for each CPU. It can be used
when the reaction to an event must occur with higher priority than the
reaction to other events.
To process an interrupt, cyclic program processing is interrupted and
the program stored in OB 2 (OB for interrupt processing) is inserted.
(Refer to the CPU 928B Programming Guide for further details.)
This interrupt-driven program processing is only possible using an
interrupt-capable digital input module or a suitable operating CP/IP
module.
No jumper setting on the CPU 928B is required. Please note, however,
that the usable interrupt line on the backplane bus depends on the CPU
slot and must be set accordingly on the I/O module (see Section 4.1).
5.2.2
Installation and Startup
Jumper settings
Note
All jumpers on the CPU 928B are required by the manufacturer
for quality testing. You must not change the jumper settings.
Removing and inserting the
module
Caution
Switch off the power supply before removing or inserting the
module.
The basic board and expansion board of the CPU 928B are one
unit and must not be separated.
CPU 928B
System Manual
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C79000-B8576-C199-03
