Specifications

Free Format Report Reference
PlantScape Server and Client Configuration Guide 275
Working with Historical Data
In addition to the entries provided for reading history data for points (see “Using
Point Values” on page 274), Free Format entries are provided for history data
calculations:
Using Server Database and Operating System File Values
The server database consists of a number of files including “user files” that are
provided for use by application programs. (For details about the server database
and user files, see the application development guide.)
Free Format report entries are provided to read values from and write values to
server database files. Values can also be read from operating system files.
C = Calculated Variable
Definition
Used to specify the print format to be used for the
Free Format variable that is the result of the
calculation.
P = Perform
Calculation
Used to specify the expression for a calculation on
several Free Format variables. Addition, subtraction,
multiplication, division and exponentiation
operations can be performed.
T =Totalize history Enables history values for a point to be read from the
database and totalized. The total is stored in the
specified Free Format variable. The format used when
the variable is printed in the report can be specified.
L = History
maximum/minimum
Enables the maximum and minimum history values
for a point to be determined and stored into two
successive Free Format variables.
D = History standard
deviation
Enables the standard deviation to be determined for
history values for a point and then stored in a Free
Format variable.
M = Operating system
file definition
Provided to specify the details about an operating
system file to be accessed. It enables the record size
and path name of the file to be specified.
plscpcg.book Page 275 Monday, May 28, 2001 10:11 AM