Section 5 1MAC309294-MB FControl functions274 RER620Technical Manualcontrol. This function executes commands and evaluates block conditions and differenttime supervision conditions. The function performs an execution command only if allconditions indicate that a switch operation is allowed. If erroneous conditions occur, thefunction indicates an appropriate cause value. The function is designed according to theIEC 61850-7-4 standard with logical nodes CILO, CSWI and XCBR.The circuit breaker control function has an operation counter for closing and openingcycles. The operator can read and write the counter value remotely from an operator placeor via LHMI.5.1.4 Operation principleStatus indication and validity checkThe object state is defined by digital inputs OPENPOS_x and CLOSEPOS_x for eachphase which are also available as outputs OPENPOS_x and CLOSEPOS_x together withthe OKPOS_x information. The debouncing and short disturbances in an input areeliminated by filtering. The binary input filtering time can be adjusted separately for eachdigital input 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 circuit breaker contacts occurs after the Eventdelay setting, assuming that the circuit breaker is still in a corresponding stateTable 288: Status indicationBlocking52 has a blocking functionality to prevent human errors that can cause serious injuries forthe operator and damages for the system components.The basic principle for all blocking signals is that they affect the commands of otherclients: the operator place and protection and autoreclose functions, for example. Theblocking principles are the following• Enabling the open command: the function is used to block the operation of the opencommand. Note that this block signal also affects the OPEN input of immediatecommand.• Enabling the close command: the function is used to block the operation of the closecommand. Note that this block signal also affects the CLOSE input of immediatecommand.The ITL_BYPASS_PH_x input is used if the interlocking functionality needs to bebypassed. When INT_BYPASS is TRUE, the circuit breaker control for the respectivephase is made possible by discarding the ENA_OPEN_PH_x and ENA_CLOSE_PH_xinput states. However, the BLK_OPEN_PH_x and BLK_CLOSE_PH_x input signals areStatus (POSITION) OPENPOS_x CLOSEPOS_x OKPOS_x1=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=False
