Capabilities - Allen-Bradley PLC-2/30 Programming And Operations Manual

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1.2

Capabilities

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Functional Block Instructions
- Shift Register instructions
- File-to-File and Word-to-File Logic instructions
- File-to-File, Word-to-File and File-to-Word transfer instructions
Binary to BCD and BCD to Binary conversions
On-line programming
Data Highway and Data Highway II compatible
Sequencers
Contact histogram
Report generation
The data table for the 1772-LP3 processor can be expanded to 8,064 words
with an 8K memory or to 8,192 words with a 16K memory. However, an
8,064 word data table is impractical with an 8K memory since there would
be nothing available for the user program.
You can expand the data table from the default size of 128 words (1 rack)
to 256 words (2 racks, word address 377
word address 400
on, the data table must be expanded in 128-word
8
sections. The I/O image tables, therefore, can be configured in size from
1 to 7 I/O racks. Each rack added, above one, increments by 10
available address for timers and counters. Table 1.A lists the first available
timer/counter address when different numbers of racks are selected.
In addition, the processor can control up to 896 inputs and 896 outputs
for a total of 1,792 I/O points in a remote system of seven 128 I/O racks
(Table 1.A).
Table 1.A
PLC 2/30 Processor Capabilities (Cat. No. 1772 LP3)
#I/O Racks
Max. I/O Points
1
128
2
256
3
384
4
512
5
640
6
768
7
896
1
Without complementary I/O. With complementary I/O, maximum I/O points is double the tabulated number up to 1,792.
Chapter 1
Introduction
) in 2-word increments. From
8
8
First Available T/C Address
1
(decimal)
(octal)
020
030
040
050
060
070
200
the first
1 3

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