Addressing Reference
SLC 500 Family of Programmable Controllers
11
The recommended default file for binary elements is file 3 of the data
table. This file accommodates up to 256 binary elements. If your
application requires more than 256 binary elements, specify one or more
files (10 – 255) in the user-defined area of the data table in addition to
file 3.
Each binary element consists of one word. You can address a binary
element in its entirety or you can address any particular data bit of an
element individually.
Figure 1
1
Logical
Addressing for Binary Elements
File Type
B = Binary
Bit Number*
0 – 15 decimal
Element Number
0 – 255 decimal
Logical Address Identifier
File Separator
Bit Separator*
$ B 3 : 123 / 15
File Number
3 or
10 – 255 decimal
*Required only if addressing to the bit level.
Figure 12
Bit Map of the Binary Element
1514131211109 8765432 10
DB = Data Bit
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Logical Addressing for
Binary Elements
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