Rockwell Automation 1747-DTAM-E,D17476.1 Data Table Access Module (DTAM) - Manual (Page 104)

B-8 SLC 500 Data Files and Logical Addressing
Publication 1747-6.1
Data File 6 - Control
These are 3-word elements, used with Bit Shift and Sequencer
instructions. Word 0 is the status word, word 1 indicates the length of
stored data, and word 2 indicates position. This is illustrated below.
Assign control addresses as follows:
Format Explanation
Rf:e
R Control
f File number.
Number 6 is the default file. A file
number between 10-255 can be used if
additional storage is required.
: Element delimiter
e
Element
number Ranges from 0 to 255. These are 3-word
elements. See the figure above.
Examples: R6:2 Element 2, control file 6.
Address bits and words by using the format RF:e.s/b where Rf:e is explained above, and
. is the word delimiter
s indicates subelement
/ is the bit delimiter
b indicates bit
R6:2/15
R6:2/13
R6:2/11
R6:2/10
R6:2/9
R6:2/8
R6:2.1
R6:2.2
R6:2.1/0
R6:2.2/0
Enable bit
Done bit
Error bit
Unload bit
Inhibit bit
Found bit
Length value
Position value
Bit 0 of the length value
Bit 0 of the position value
EN
14
DN
12
ER UL IN FD
7 6 5
Internal Use
15 13 11 10 9
Length of Bit array or File
8
Bit Pointer or Position
4
0
0
1
2
Word 3 2 1
Control Element
Addressable Bits Addressable Words
o
rror
od o
od
oo
d r
r o ddr