Rockwell Automation 1772-LP3 PLC - 2/30 Programmable Controller Programming and Operations Manual - Manual (Page 13)

Introduction
Chapter 1
1Ć3
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
8
) in 2-word increments. From
word address 400
8
on, the data table must be expanded in 128-word
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
8
the first
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
PLCĆ2/30 Processor Capabilities (Cat. No. 1772ĆLP3)
#I/O Racks Max. I/O Points 1 (decimal)
First Available T/C Address
(octal)
1
2
3
4
5
6
7
128
256
384
512
640
768
896
020
030
040
050
060
070
200
1 Without complementary I/O. With complementary I/O, maximum I/O points is double the tabulated number up to 1,792.
1.2
Capabilities