Allen-Bradley PLC-2/30 - PLC 2;30 Memory Organization (Default Configuration)

Data Table
Chapter 3
38
Figure 3.3
PLC2/30
Memory Organization (Default Configuration)
Processor W ork Area
No. 1
Processor W ork Area
No. 2
Timer/Counter
Accumulated V alues (ACC)
Internal Storage
Timer/Counter
Preset V alues (PR)
Internal Storage
1
Bits in this word are used by the processor for
battery low condition, message generation,
and data highway. Do not put output modules
in rack 2, I/O group 7.
2
These words are used to indicate remote rack
fault status in a remote I/O system. Do not
put input modules in rack 2, I/O groups 5 or 6.
Default
Configured
Data T able
(128 W ords)
Octal
W
ord Address
Decimal
Words
Per Area
Total
Decimal
Words
8
24
64
72
88
128
Up to
16,256
8
16
40
8
16
40
007
010
026
027
030
077
100
107
110
127
130
177
17777
000
User Program
Input
Image T able
Output
Image T able
Bit
Address
17
00
17
00
17
00
17
00
17
00
17
00
125
126
2
1
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