Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW - Manual (Page 101)

Data Table Addressing and Editing
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You can display a shorter list of symbols by entering the first few letters of the desired
symbol text before pressing the [Ins] key. For instance, entering LS then pressing [Ins]
will display a list of symbols which begin with the letters LS.
To move through the symbol list, you can use the arrow keys or [PgUp] and [PgDn] .
You can also locate symbols by entering successive characters in the symbol name. For
instance, pressing the letter L causes the list to jump to the first symbol that begins with
the letter L. Entering subsequent letters in the symbol string moves the cursor to the
first matching symbol name.
After pressing [Enter] to accept an address, the input is parsed, or checked, to make
sure it is valid for the current instruction type.
Bit and Word Mnemonics in Symbols
You can use bit and word mnemonics in creating a symbol. For instance, if you want to
address a timer’s done (.DN) bit, and the timer has a symbol attached to it, you could
enter SYMBOL.DN (where SYMBOL is the symbol for the timer address) as a symbol for
the done bit. You can use a period ( . ), underscore ( _ ), or forward slash ( / ) as a
delimiter to separate the bit or word mnemonic from the symbol.
There are a series of reserved bit and word mnemonics that the system will interpret as
mnemonic addresses if they are incorporated into symbol names. These mnemonics are
listed in Appendix D - Bit and Word Mnemonics . If a symbol contains such a
mnemonic, the system truncates the symbol. For instance, if you use
SYMBOL_DN_FOUR as a symbol, the system truncates the symbol to SYMBOL_DN (the
done bit of SYMBOL ). This happens whether or not SYMBOL is a symbol in use.
Short Addressing
When addressing one of the default files (file numbers 0 through 7 or 8 depending on
your processor) you can omit the file number and the colon. For example, you can
enter address N7:10 as N10. For bit addresses in file B3, you can omit both the file
number and the slash ( / ). For example, you can enter address B3/0 as B0.
This feature must be enabled on the Program Operational Parms screen. Refer to
Chapter 12 - Customizing PLC-500 A.I .