logical one to the CHNGLCK input. If such a situation would occur in spite of theseprecautions, then please contact the local ABB representative for remedial action.15.5.3 Function blockCHNGLCKLOCK* ACTIVEOVERRIDEIEC09000062-1-en.vsdIEC09000062 V1 ENFigure 271: CHNGLCK function block15.5.4 SignalsTable 504:CHNGLCK Input signalsName Type Default DescriptionLOCK BOOLEAN 0 Activate change lockTable 505:CHNGLCK Output signalsName Type DescriptionACTIVE BOOLEAN Change lock activeOVERRIDE BOOLEAN Change lock override15.5.5 SettingsThe function does not have any parameters available in Local HMI or Protection andControl IED Manager (PCM600)15.5.6 Operation principleThe Change lock function (CHNGLCK) is configured using ACT.The function, when activated, will still allow the following changes of the IED state thatdoes not involve reconfiguring of the IED:• Monitoring• Reading events• Resetting events• Reading disturbance data1MRK 511 287-UUS A Section 15Basic IED functions605Technical manual
