Circuit Breaker Control; Function Keys - GE MiCOM P747 Agile Technical Manual

Chapter 4 - Configuration
Now you can execute the chosen function (Set/Reset in this case).
If neither of the cursor keys is pressed within 20 seconds of entering a hotkey sub menu, the device reverts
to the default display.
2.9.3

CIRCUIT BREAKER CONTROL

You can open and close the controlled circuit breaker with the direct access key to the right, if enabled as
described above. By default direct access to the circuit breakers is disabled.
If direct access to the circuit breakers has been enabled, the bottom right hand part of the display will read
"Open or Close" depending on whether the circuit breaker is closed or open respectively:
For example:
To close the circuit breaker (in this case), press the key directly below CLOSE. You will be given an option to
cancel or confirm.
More detailed information on CB Control can be found in the CB Control section in the Monitoring and
Control chapter.
2.10

FUNCTION KEYS

With the exception of products housed in 20TE cases, the products have a number of function keys for
programming control functionality using the programmable scheme logic (PSL).
Each function key has an associated programmable tri-colour LED that can be programmed to give the
desired indication on function key activation.
These function keys can be used to trigger any function that they are connected to as part of the PSL. The
function key commands are in the FUNCTION KEYS column.
The first cell down in the FUNCTION KEYS column is the Fn Key Status cell. This contains a 10 bit word,
which represents the 10 function key commands. Their status can be read from this 10 bit word.
The next cell down (Fn Key 1) allows you to activate or disable the first function key (1). The Lock setting
allows a function key to be locked. This allows function keys that are set to Toggled mode and their DDB
signal active 'high', to be locked in their active state, preventing any further key presses from deactivating the
66
¬STP GP User02®
Control Input 1
EXIT SET
Plant Reference
MiCOM
HOTKEY CLOSE
Execute
CB CLOSE
Cancel Confirm
FUNCTION KEYS
Fn Key Status
0000000000
MiCOM P747
P747-TM-EN-1
P747-TM-EN-1.1