9.1.3 FunctionalityThe CBXCBR, DCXSWI and ESXSWI are intended for circuit breaker,disconnector and earthing switch control and status information purposes. Thesefunctions execute commands and evaluate block conditions and different timesupervision conditions. The functions perform an execution command only if allconditions indicate that a switch operation is allowed. If erroneous conditionsoccur, the functions indicate an appropriate cause value. The functions aredesigned according to the IEC 61850-7-4 standard with logical nodes CILO, CSWIand XSWI / XCBR.The circuit breaker, disconnector and earthing switch control functions have anoperation counter for closing and opening cycles. The counter value can be readand written remotely from the place of operation or via LHMI.9.1.4 Operation principleStatus indication and validity checkThe object state is defined by two digital inputs, POSOPEN and POSCLOSE, whichare also available as outputs OPENPOS and CLOSEPOS together with the OKPOSinformation. The debouncing and short disturbances in an input are eliminated byfiltering. The binary input filtering time can be adjusted separately for each digitalinput used by the function block. The validity of the digital inputs that indicate theobject state is used as additional information in indications and event logging. Thereporting of faulty or intermediate position of the apparatus occurs after the Eventdelay setting, assuming that the circuit breaker is still in a corresponding state.Table 586:Status indicationStatus (POSITION) POSOPEN/OPENPOS POSCLOSE/CLOSEPOSOKPOS1=Open 1=True 0=False 1=True2=Closed 0=False 1=True 1=True3=Faulty/Bad (11) 1=True 1=True 0=False0=Intermediate (00) 0=False 0=False 0=FalseBlockingCBXCBR, DCXSWI and ESXSWI have a blocking functionality to prevent humanerrors that can cause injuries to the operator and damages to the system components.The basic principle for all blocking signals is that they affect the commands ofother clients: the operator place and protection and autoreclosing functions, forexample. There are two blocking principles.Section 9 1YHT530004D05 DControl functions668 615 seriesTechnical Manual
