User manual

Computer Gateway User Manual 6-1 5/96
6
CG DATABASE CONTENT
Section 6
This section covers the content and use of information in the CG database.
6.1 INTRODUCTION
The three user-specified components of the CG database are Advanced Control Interface
Data Points (ACIDP) with their associated Custom Data Segments, the Calculated Results
Data Points (CRDP), and the Internal Data Tables (internal DDT).
Creation of the Internal Data Tables is explained in paragraph 4.5, while ACIDP and CRDP
preparation are explained in Appendix E. An additional user specification that affects the
CG database is the assignment of Process Units, explained in Appendix D.
6.2 CG MEMORY ESTIMATING
There are two sets of limits that must be considered in preparing the CG database. First is
the set of design limits on the numbers of each items that are allowed. Second is the
amount of memory available and the size requirements for each item.
The built-in design limits (further restricted by memory availability) are
250 ACIDPs
500 CRDPs
10 Custom Data Segments per ACIDP or CRDP
40 CG-resident internal DDTs
300 parameters in a internal DDT
63 Units assigned to a CG
6.2.1 Memory Management Schematic
The amount of memory available in the CG for database use varies by product release.
You can use the schematic display CGDBSIZE to determine if the present use of memory
in a CG is such that you may need to install additional memory. This display is provided in
directory DIA1 on cartridge &CR6 or on floppy diskette DIA1 in Media Kit MP-MKUS10
or MP-MKUS20.
CGDBSIZE is available at Universal Stations running the Operator Personality when the
pathname for the volume or directory that contains this schematic is listed as one of the
schematic pathnames in your Pathname Catalog in the Area Database. When this is true,
you can press the SCHEM key, type in the name of the schematic, CGDBSIZE, and press
ENTER. The schematic contains instructions for its use when displayed.