Function block name Edition 1 logical nodes Edition 2 logical nodesLT3CPDIF LT3CPDIF LT3CGAPCLT3CPDIFLT3CPHARLT3CPTRCMVGAPC MVGGIO MVGAPCNS4PTOC EF4LLN0EF4PTRCEF4RDIRGEN4PHARPH1PTOCEF4PTRCEF4RDIRPH1PTOCOC4PTOC OC4LLN0GEN4PHARPH3PTOCPH3PTRCGEN4PHARPH3PTOCPH3PTRCOV2PTOV GEN2LLN0OV2PTOVPH1PTRCOV2PTOVPH1PTRCPCFCNT PCGGIO PCFCNTPHPIOC PHPIOC PHPIOCQCBAY QCBAY BAY/LLN0QCRSV QCRSV QCRSVRCHLCCH RCHLCCH RCHLCCHREFPDIF REFPDIF REFPDIFROV2PTOV GEN2LLN0PH1PTRCROV2PTOVPH1PTRCROV2PTOVSCHLCCH SCHLCCH SCHLCCHSCILO SCILO SCILOSCSWI SCSWI SCSWISESRSYN RSY1LLN0AUT1RSYNMAN1RSYNSYNRSYNAUT1RSYNMAN1RSYNSYNRSYNSLGAPC SLGGIO SLGAPCSMBRREC SMBRREC SMBRRECSMPPTRC SMPPTRC SMPPTRCSP16GAPC SP16GGIO SP16GAPCSPC8GAPC SPC8GGIO SPC8GAPCSPGAPC SPGGIO SPGAPCSSCBR SSCBR SSCBRSSIMG SSIMG SSIMGSSIML SSIML SSIMLSXCBR SXCBR SXCBRSXSWI SXSWI SXSWITable continues on next pageSection 1 1MRK 505 394-UEN AIntroduction38 Line differential protection RED650 2.2 IECTechnical manual