Hardware selector switches are used extensively by utilities, in order to have differentfunctions operating on pre-set values. Hardware switches are however sources formaintenance issues, lower system reliability and extended purchase portfolio. The virtualselector 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 theIED 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 ofpositions of the switch can be established by settings (see below), one must be careful incoordinating the settings with the configuration (if one sets the number of positions to x insettings – for example, there will be only the first x outputs available from the block in theconfiguration). Also the frequency of the (UP or DOWN) pulses should be lower than thesettingtPulse.From the local HMI, the selector switch can be operated from Single-line diagram (SLD).11.3.3 Setting guidelines SEMOD115063-294 v6The following settings are available for the Logic rotating switch for function selection andLHMI presentation (SLGAPC) function:Operation: Sets the operation of the functionOn orOff.NrPos: Sets the number of positions in the switch (max. 32).OutType:Steady orPulsed.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 outputactivation.StopAtExtremes: Sets the behavior of the switch at the end positions – if set toDisabled, whenpressing UP while on first position, the switch will jump to the last position; when pressingDOWN at the last position, the switch will jump to the first position; when set toEnabled, nojump will be allowed.11.4 Selector mini switch VSGAPC SEMOD158754-1 v311.4.1 IdentificationSEMOD167850-2 v3Function description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberSelector mini switch VSGAPC - -11.4.2 Application SEMOD158803-5 v7Selector mini switch (VSGAPC) function is a multipurpose function used in the configurationtool in PCM600 for a variety of applications, as a general purpose switch. VSGAPC can be usedfor both acquiring an external switch position (through the IPOS1 and the IPOS2 inputs) andSection 11 1MRK 504 158-UEN AControl174Application manual
