• 989G_OP = 1• 989G_CL = 0If, 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_ONIf there is no voltage supervision, then set the corresponding inputs as follows:• VOLT_OFF = 1• VOLT_ON = 012.5 Logic rotating switch for function selection and LHMIpresentation SLGAPC12.5.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberLogic rotating switch for functionselection and LHMI presentationSLGAPC - -12.5.2 ApplicationThe 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 aselector switch functionality similar with the one provided by a hardware multi-positionselector switch. Hardware selector switches are used extensively by utilities, in order tohave different functions operating on pre-set values. Hardware switches are howeversources 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 stationcomputer). SWPOSN is an integer value output, giving the actual output number. Since1MRK 505 337-UUS - Section 12Control375Application manual
