• 989G_OP = 1
• 989G_CL = 0
If, in this case, line voltage supervision is added, then rather than setting 989 to open state,
specify the state of the voltage supervision:
• 989_OP = VOLT_OFF
• 989_CL = VOLT_ON
If there is no voltage supervision, then set the corresponding inputs as follows:
• VOLT_OFF = 1
• VOLT_ON = 0
15.5 Logic rotating switch for function selection and LHMI
presentation SLGAPC
15.5.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Logic rotating switch for function
selection and LHMI presentation
SLGAPC - -
15.5.2 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
1MRK 506 369-UUS - Section 15
Control
Line distance protection REL670 2.2 ANSI 737
Application manual
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