Alstom MiCOM P545 - 3.5 Setting groups selection

P54x/EN OP/La4 Operation
(OP) 5-130 MiCOM P543, P544, P545 & P546
OP
The Function Keys column has ‘Fn. Key n Mode’ cell which allows the user to configure the
function key as either ‘Toggled’ or ‘Normal’. In the ‘Toggle’ mode the function key DDB
signal output will remain in the set state until a reset command is given, by activating the
function key on the next key press. In the ‘Normal’ mode, the function key DDB signal will
remain energized for as long as the function key is pressed and will then reset automatically.
A minimum pulse duration can be programmed for a function key by adding a minimum
pulse timer to the function key DDB output signal.
The Fn. Key n Status cell is used to enable/unlock or disable the function key signals in
PSL. The ‘Lock’ setting has been specifically provided to allow the locking of a function key
therefore preventing further activation of the key on consequent key presses. This allows
function keys that are set to ‘Toggled’ mode and their DDB signal active ‘high’, to be locked
in their active state therefore preventing any further key presses from deactivating the
associated function. Locking a function key that is set to the Normal mode causes the
associated DDB signals to be permanently off. This safety feature prevents any inadvertent
function key presses from activating or deactivating critical relay functions.
The Fn. Key Labels cell makes it possible to change the text associated with each individual
function key. This text will be displayed when a function key is accessed in the function key
menu, or it can be displayed in the PSL.
The status of the function keys is stored in battery backed memory. In the event that the
auxiliary supply is interrupted the status of all the function keys will be recorded. Following
the restoration of the auxiliary supply the status of the function keys, prior to supply failure,
will be reinstated. If the battery is missing or flat the function key DDB signals will set to logic
0 once the auxiliary supply is restored. Please also note the relay will only recognize a
single function key press at a time and that a minimum key press duration of approximately
200 msec. is required before the key press is recognized in PSL. This deglitching feature
avoids accidental double presses.
3.5 Setting groups selection
The setting grou
ps can be changed either via opto inputs, via a menu selection, via the
hotkey menu or via function keys. In the Configuration column if 'Setting Group - select via
optos' is selected then any opto input or function key can be programmed in PSL to select
the setting group as shown in the table below. If 'Setting Group - select via menu' is selected
then in the Configuration column the 'Active Settings - Group1/2/3/4' can be used to select
the setting group.
The setting group can be changed via the hotkey menu providing ‘Setting Group select via
menu’ is chosen.
Two DDB signals are available in PSL for selecting a setting group via an opto input or
function key selection. The following table illustrates the setting group that is active on
activation of the relevant DDB signals.
DDB 542
SG select x1
DDB 543
SG select 1x
Selected setting group
0 0 1
1 0 2
0 1 3
1 1 4
Note: Each setting group has its own PSL. Once a PSL has been designed
it can be sent to any one of 4 setting groups within the relay. When
downloading a PSL to the relay the user will be prompted to enter the
desired setting group to which it will be sent. This is also the case
when extracting a PSL from the relay.