Rockwell Automation GMLC Reference Manual - Manual (Page 413)

Publication GMLC-5.2 - November 1999
376 RIO Blocks
Fixed Binary Numeric Format
When you select Fixed from the first Numeric Format menu and Binary
from the second, the values written to the formatted data output group are
the same as with auto binary numeric format except that the number of
decimal digits (digits to the right of the decimal point) is always the same.
Select the desired number of decimal digits from the Fractional Digits
menu. Fixed format gives a visually more stable display at the expense of
absolute precision. See Auto Binary Numeric Format for details of the
values written to the selected formatted data output group.
Because a 16-bit magnitude is written, the maximum value that can be
represented is ±65,535. This limits the largest value that the motion
controller can write based on the number of specified decimal digits as
shown in the table below.
Be careful to select the number of decimal digits so that the expected
maximum values can be represented with the required precision.
Binary Formatted Data Output Group Maximum Values
Number of
Decimal Digits
Maximum Value
0 ±65,535.0
1 ±6,553.5
2 ±655.35
3 ±65.535
4 ±6.553 5
5 ±0.655 35
6 ±0.065 535
7 ±0.006 553 5