Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 User Manual

Page 78

Advertising
background image

Addressing DH and DH+ Data Transfers

Chapter 5

5-4

You can only address a group of words as the source field in an assignment
command. The destination must be a file that is as large as, or larger than,
the source size plus the offset.

Figure 5.2

Example for Addressing Consecutive PLCĆ2 Words

$

Address delimiter

Word offset from beginning of memory (octal)

Delimiter

Number of words to be transferred (decimal)

015 , 4

Addressing a single word is similar to addressing a word range only
without specifying a size:

Format:

Example:

offset

$047

Addressing a Bit

To address a specific bit within a word, use the following format:

Format:

Example:

offset/bit

$047/015

Figure 5.3

Example for Addressing Specific Bits in PLCĆ2 Memory

$ 0121

Bit number 10 (octal)
Bit delimiter

Word offset from beginning of memory (octal)

Address delimiter

/ 010

Advertising