Omega Vehicle Security OMP-MODL - Manual (Page 228)

11.. . A PPENDIX A: M ASTER I CON F ILE R EFERENCE
U SING T HE OMP-MODL 11-66
Y input Updated - The Output is updated only when the Y input is
Updated. If a calculation is performed that uses the X input, the last X
input value will be used in the calculation and the Output will be updated.
Output Format: The User can specify the data format for the Output from the icon.
In certain applications, additional processing speed and/or less memory
per stored sample can be realized.
Default to Input Formats - the default format. The data will be passed
using the same data format as the Inputs use. Note that if inputs are
received as integers, operations resulting in a decimal component (eg
division) will be output as integers with corresponding loss of precision
(trunction of decimal). If this is of concern, utilize the Floating Point format.
Floating Point - The Output data will be of Floating point format. Floating
Point format includes both the integer and decimal components (XXX.XXX)
of the calculation result.
Advantages of Floating Point mode:
1. This format will result in outputs that have no loss in
precision.
Disadvantages of Floating Point mode:
1. Calculations will perform slower than Long Integer mode. The
calculation speed may be 10x slower per operation than using
Long Integer mode.
2. If the Output is connected to a Memory icon, Floating Point
mode will always use 4 bytes for data storage.
Long Integer - The Input data will be converted to integer format, then the
calculation will be performed and output in signed Integer format. Signed
Integer format includes only the digits to the left of the decimal (XXXXX.)
Advantages of Long Integer mode:
1. Calculations will perform faster. Processing throughput rates
may be up to 10 times faster (per operation) than the
equivalent calculation using floating point math.
2. If the Output is connected to a Memory icon, Long Integer
mode will generally utilize a fewer number of bytes for data
storage. The number of bytes will dynamically size, from 1 to
4 bytes, according to the magnitude of the Output.
Disadvantages of Long Integer mode:
1. Input numerical precision will be lost if incoming data is in
floating point format. Precison will be lost in the conversion to
integer format (eg 26.3 becomes 26). If large numbers are
processed, this loss of precision may be negligible (eg
36785.2 becomes 36785).
2. Calculation results will be truncated to integers, hence any
decimal components will be lost (eg 10/3=3.33333 but will be
output as the integer 3). If large numbers are processed
and/or operations are performed that will not have decimal
results (addition,subtraction, multiplication, etc), this loss may
be negligible.