Hitachi Relion 670 Series Applications Manual page 275

1MRK506375-UEN Rev. N
tTCTimeout: This setting gives the maximum time interval for a raise or lower command to be
completed.
tPulseDur: Length of the command pulse (URAISE/ULOWER) to the tap changer. It shall be noticed
that this pulse has a fixed extension of 4 seconds that adds to the setting value of tPulseDur.
12.6 Logic rotating switch for function selection and LHMI
presentation SLGAPC
12.6.1 Identification
Function description
Logic rotating switch for function
selection and LHMI presentation
12.6.2 Application
The logic rotating switch for function selection and LHMI presentation function (SLGAPC) (or the
selector switch function block, as it is also known) is used to get a selector switch functionality similar
with the one provided by a hardware multi-position selector switch. Hardware selector switches are
used extensively by utilities, in order to have different functions operating on pre-set values.
Hardware switches are however sources for maintenance issues, lower system reliability and
extended purchase portfolio. The virtual selector switches eliminate all these problems.
SLGAPC function block has two operating inputs (UP and DOWN), one blocking input (BLOCK) and
one operator position input (PSTO).
SLGAPC can be activated both from the local HMI and from external sources (switches) via the IED
binary inputs. It also allows the operation from remote (like the station computer). SWPOSN is an
integer value output, giving the actual output number. Since the number of positions of the switch can
be established by settings (see below), one must be careful in coordinating the settings with the
configuration (if one sets the number of positions to x in settings – for example, there will be only the
first x outputs available from the block in the configuration). Also the frequency of the (UP or DOWN)
pulses should be lower than the setting tPulse.
From the local HMI, the selector switch can be operated from Single-line diagram (SLD).
12.6.3 Setting guidelines
The following settings are available for the Logic rotating switch for function selection and LHMI
presentation (SLGAPC) function:
Operation: Sets the operation of the function On or Off.
NrPos: Sets the number of positions in the switch (max. 32).
OutType: Steady or Pulsed.
tPulse: In case of a pulsed output, it gives the length of the pulse (in seconds).
tDelay: The delay between the UP or DOWN activation signal positive front and the output activation.
StopAtExtremes: Sets the behavior of the switch at the end positions – if set to Disabled, when
pressing UP while on first position, the switch will jump to the last position; when pressing DOWN at
Railway application RER670
Application manual
IEC 61850
identification
SLGAPC
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IEC 60617 ANSI/IEEE C37.2
identification device number
- -
Section 12
Control
SEMOD114936-1 v6
SEMOD167845-2 v4
SEMOD114927-4 v7
SEMOD115063-294 v7
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