Specifications

8 – Configuring Points
182 R400
• Scaled formats, which converts and scales a field value before loading it into
the parameter.
With a scaled format, parameters that use this format are automatically
scaled.
To create a user-defined data format:
1 On the System Configuration Menu display click User-defined Data Formats.
2 Click the Unscaled or Scaled tab, as appropriate.
3 Click an empty data format row.
4 Enter the name for the data format. (Do not use any name listed in
“Reserved Data Format Names” on page 186.)
5 Enter the details as appropriate.
Property Description
Name The unique name of the data format. A maximum of 10
alphanumeric characters (no spaces, underscores or
double quotes).
Do not use any name listed in “Reserved Data Format
Names” on page 186.
Data type The data format of the field value, which can be:
•
INT2 (16-bit integer). If you select this, you can
specify the Start bit and Width of the field value.
(By default these are 0 and 16 respectively).
•
INT4 (32-bit integer)
•
REAL4 (single-precision IEEE floating point)
Signed Value If selected, indicates that the field value ranges from
negative to positive values.
Minimum,
Maximum
Specifies the minimum and maximum field values.
Enter
NaN if you do not want to specify a value.
Swap bytes,
Swap words
Specifies whether the bytes/words of the field value are
swapped during conversion. Field values are assumed
to be big-endian (high order byte first).
For example, if a device uses big-endian storage and the
field value is INT4 in two 16-bit registers with the least
significant 16-bits first, you would select Swap words.
If the device used little-endian storage, you would also
select Swap bytes.
plscpcg.book Page 182 Monday, May 28, 2001 10:11 AM