Rockwell Automation 1775-S4B,D17756.5.3 User Manual SCANNER/MSG HND - Manual (Page 48)

Chapter
6
6Ć1
Logical Addressing for
Report Generation
In addition to creating text in procedures, you can use report generation to
manipulate data within a specific area of PLC–3 memory. After reading
this chapter, you should be able to:
Use data table addressing to specify a memory area
Use extended addressing to specify a memory area
Logical addressing for 1775–S4B scanner report generation is similar to
logical addressing for the PLC–3 front panel or the industrial terminal. The
dollar sign ($) delimiter tells the 1775–S4B scanner that the following data
denotes a PLC–3 memory address. You can specify PLC–3 addresses in
two ways:
Data table addresses
Extended
addresses
We discuss the formats for each of these logical addressing methods in the
following sections.
You can specify data table sections of memory by using data table
addressing. In data table addressing, you follow the $ sign with the data
table section specifier. Then you can specify a file, word, and/or bit. Table
6.A shows the data table section specifiers. You must use a colon before
the word number.
You can specify an octal address format for data table addresses by
entering a leading zero in the bit position of the address. Using this format
can make your report generation procedure compatible with ladder
diagram program addressing and I/O terminal numbering. Figure 6.1
shows how the bit numbering formats in report generation correspond to
the bit numbering format within a PLC–3 memory word.
6.0
Chapter Objectives
6.1
Introduction
6.2
Data Table Addressing