Date Code 20010518 General Description 2-11
SEL-2020 Instruction Manual
AUTO
This SEL-2020 command provides a list of supported operate and “20” commands on auto-
configured SEL IED ports. You can use this to confirm that the desired commands exist for the
relay you are using.
MAP
This SEL-2020 command provides a method to look at the structure and addresses of a database
region on a port-by-port basis, or at specific regions within each port’s database. When this com-
mand is applied to a port, the SEL-2020 responds with a list of database regions, their data
names, and the number of archive records. You can also use the MAP command to look at the
database structure within a region. When this command is applied to a region, the SEL-2020
responds with a list of data item labels, their addresses, and the type and number of data.
VIEW
This SEL-2020 database tool enables you to look at the data that are being collected, parsed and
stored in a database region on a specific port. Several variations of this command allow you to
view all, part, or specific items within the data region.
TARGET
You can use the TARGET command to view the status of the SEL-2020 Global and Local ele-
ments and the status of any relay elements that are received from an SEL relay. The relay
elements will appear to be appended to the Local elements. The TARGET command, like the
SEL relay TARGET command, includes variations that permit you to request all elements or a
selected row of elements, and to automatically repeat the request a specified number of times.
STATUS
The STATUS command provides you with an overview of the SEL-2020 performance and a
port-by-port analysis of communication and database performance. Any problems with data
collection or database delays occurring in any specific region will be identified on this report.
This information will help you determine if data are being requested faster than can be
accommodated by the attached device, or if multiple requests are interfering with each other.
The status display also identifies ports in transparent communication.
MEM
The MEM command indicates the status of the RAM, EEPROM, and FLASH memory pools.
You can use this to determine if you are in danger of running out of memory.
Data Parsing Options
The SEL-2020 database stores data that are parsed, or separated, into the smallest useful items.
Parsing data in the SEL-2020 reduces communication and processing burdens for other devices
or systems that use these data by permitting them to request and transfer only the specific data
they need. The SEL-2020 performs the data parsing in several ways:
To Next Page
Loading...