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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
8-2 A5E00105492-03
Rack 2
(EG)
Rack 1
(EG)
Rack 3
(EG)
Rack 0
(ZG)
1
2
3
4
0
5
4
256 272
6
8
288
7
12
304
8
16
320
9
20
336
10
24
352
11
28
368
Slot number
BG initial address digital
BG initial address analog
4
4
4
3
3
3
32
64
96
5
5
5
36
68
100
384
512
640
400
528
656
6
6
6
40
72
104
416
544
672
7
7
7
44
76
108
432
560
688
8
8
8
48
80
112
448
576
704
9
9
9
52
84
116
464
592
720
10
10
10
56
88
120
480
608
736
11
11
11
60
92
124
496
624
752
Slot number
Slot number
Slot number
BG initial address digital
BG initial address digital
BG initial address digital
BG initial address analog
BG initial address analog
BG initial address analog
SF
BUSF
DC5V
FRCE
RUN
STOP
CPUPS IM
IM SM SM SM
SM
SM
SM
SM
SM
SM
IM SM SM SM
SM
SM
SM
SM
SM
SM
IM SM SM SM
SM
SM
SM
SM
SM
SM
SM SM SM
SM
SM
SM
SM
SM
SM
Not with CPU 31xC
Figure 8-1 S7-300 slots and the associated module start addresses