R 02/92
Operating Instructions
2.7 General Interrupt Processing with S5–150 S/U
The operating system of the programmable controller scans the peripheral byte O
(PYO)
at each
block limit.
When an interrupt occurs, a jump to the correlated interrupt organization block
(OB2
to
OB9)
takes place.
In the programmable controller the bits 0.0 to 0.7 are directly allocated to the
OBS
2 to
OB9.
Bit 0.0 activates OB2, bit 0.1 activates
OB3
and so
on.
A bit of byte O can be allocated to any
1P
241.
This allows a maximum of 8
IPs
with interrupt processing in the expansion unit.
In the programmable controller S5–150SIU, the
1P
241 may only be operated in the
Example:
x = closed
– = open
PYO
DIP switch S2..
Jum
E
Master
Slave 1
Slave 6
too
No.
Bit O
.10 Group interrupt
2
x
—
—
Bit 1
.9 –“-
3
–
x
—
Bit 2
.8 –“-
4
x
— —
Bit 3
.7 –“-
5
x
— —
Bit 4
.6 –“-
6
x
— —
Bit 5
.5 –“-
7
x
—
—
Bit 6
.4 –“-
8
– –
x
Bit 7
,3
9
x
—
—
x
x x
.1 Changeover:
OB2
only (o en)
8
—
x x
or
OB2
to B9 (closed)
programmable controller S5–
150SIU
does not have interrupt lines.
1P
241 Equipment Manual
@
Siemens AG 1989, Order No.: 6ES5
998-0KD21
2 – 13
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