6.22
SEL-2032 Communications Processor Instruction Manual Date Code 20120126
Database
Access Methods
The User region includes 10 registers of nonvolatile storage. If the SEL-2032
loses power, these registers are reloaded automatically with the stored value
when the SEL-2032 regains power. Values in the nonvolatile storage are
updated from the volatile version (visible in the User region and updated every
0.5 seconds) once a day at 23:30 (11:30 pm) and any time you change settings
on the port where nonvolatile registers are being used. You can manually
initialize nonvolatile registers using the STORE command. See Math/Data
Movement (SET M) Settings on page 7.31 for more information on
configuring and using nonvolatile storage.
Access Methods
You can access data contained within the database by function, region,
register, or bit.
Access
by Function
You can access much of the data within the database based on its function; you
do not need to know where it is in the database to reference it. The following
commands access database information by function:
CONTROL Affects Global elements in Global region.
DATE Accesses date information in Global region.
ID Reads FID string from Global or Local regions.
STATUS Reads various Global and Local region items.
TARGET Reads Global, Local, and Relay elements contained in Global,
Local, and Dx regions.
TIME Accesses time within Global region.
Access by Region
Access data by region when working with groups of associated data. To access
by region, specify a port number and a region label. The region label may be
the generic label or the data type, as given by the MAP command.
The CLEAR, MAP, and VIEW commands use region access methods. The
special message string \F.../ also uses region access. Some examples of
accessing data by region are:
VIEW 2:METER Displays meter data from the Port 2 database.
MESG1="\F8:DEMAND/" Defines the contents of MESG1 as formatted demand
data from the Port 8 database.
CLEAR 7:A1 Clear the oldest record from region A1 of the Port 7 database.
Table 6.10 Data Access by Region Labels
Generic Labels Example Data Type Labels
GLOBAL METER
LOCAL DEMAND
BUF TARGET
D1–D8 STATUS
A1–A3 FLOAT
USER CHAR
Courtesy of NationalSwitchgear.com
To Next Page
Loading...