GE P741, Technical Manual

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Settings P74x/EN ST/Na7
MiCOM P741, P742, P743 (ST) 4-
37
ST
Menu Text Default Setting
Setting Range
Step Size
Min. Max.
INTERMICOM CONF
IM1 Fallback Mode Default Default/ Latched
Visible if “IM1 Cmd type”
≠
“Disabled”
When “Latched”, during periods of extreme where the synchronization of a message
structure is lost or is cannot be decoded, the last good command can be maintained until a
new valid message is received
When “Default”: if the synchronisation is lost, after a time period, a known fallback state
can be assigned to the command.
In this latter case, the time period will need to be set in the “IM# FrameSynTim” cell and the
default value will need to be set in “IM# DefaultValue” cell. As soon as a full valid message
is seen by the relay all the timer periods are reset and the new valid command states are
used. An alarm is provided if the noise on the channel becomes excessive
IM1 DefaultValue 1 0 1 1
Visible if “IM1 Fallback Mode” = “Default”
Sets the default value to assign to the command after a time period.
IM1 FrameSyncTim 20ms 10ms 1500ms 10ms
Visible if “IM1 Fallback Mode” = “Default”
Sets the time period to assign the known default value to the relay.
IM2 to IM8 Cmd type
As IM1 Cmd Type.
Note: Setting choices ere diffrent from IM2 to IM8 (see IM1 Cmd type).
When Cmd Type is enabled, Fallback Mode is enabled.
Default values and frameSync type are settable when fallback mode selection is “latched”.
1.3.11 “Function keys” menu (P741 / P743)
Available in the Central Unit P741 and the Peripheral Unit P743
Menu Text Default Setting
Setting Range
Step Size
Min. Max.
FUNCTION KEYS
Fn. Key Status 0000000000
Displays the status of each function key.
Fn. Key 1 Status Unlocked Disabled, Locked, Unlock
Setting to activate function key. The ‘Lock’ setting allows a function key output that is set to
toggle mode to be locked in its current active state.
Fn. Key 1 Mode Toggled Toggled, Normal
Sets the function key in toggle or normal mode. In ‘Toggle’ mode, a single key press will
set/latch the function key output as ‘high’ or ‘low’ in programmable scheme logic. This
feature can be used to enable/disable relay functions. In the ‘Normal’ mode the function
key output will remain ‘high’ as long as key is pressed.
Fn. Key 1 Label Function Key 1
Allows the text of the function key to be changed to something more suitable for the
application.
Fn. Key 2 to 10
Status
Unlocked Disabled, Locked, Unlock
Setting to activate function key (see “Fn. Key 1 Status”)