Table 27:Possible cause values from XLNPROXYCauseNoCause Description Conditions8 Blocked-by-Mode The BEH input is 5.2 Blocked-by-switching-hierarchy The LOC input indicates that only local commands areallowed for the breaker IED function.-24 Blocked-for-open-cmd The BLKOPN is active indicating that the switch isblocked for open commands.-25 Blocked-for-close-cmd The BLKCLS is active indicating that the switch isblocked for close commands.9 Blocked-by-process If the Blk input is connected and active indicating that theswitch is dynamically blocked. Or if the OPCAP input isconnected, it indicates that the operation capability of theswitch is not enough to perform the command.5 Position-reached Switch is already in the intended position.-31 Switch-not-start-moving Switch did not start moving within tStartMove.-32 Persistent-intermediate-state The switch stopped in intermediate state for longer thantIntermediate.-33 Switch-returned-to-init-pos Switch returned to the initial position.-34 Switch-in-bad-state Switch is in a bad position.-35 Not-expected-final-position Switch did not reach the expected final position.The OPCAP input and output are used for the CBOpCap data of aXCBR respectively SwOpCap for a XSWI. The interpretation forthe command following is controlled through the settingSwitchType.12.3.1.5 Reservation function (QCRSV and RESIN) M16609-3 v4The purpose of the reservation function is primarily to transfer interlockinginformation between IEDs in a safe way and to prevent double operation in a bay,switchyard part, or complete substation.For interlocking evaluation in a substation, the position information from switchingdevices, such as circuit breakers, disconnectors and earthing switches can berequired from the same bay or from several other bays. When information isneeded from other bays, it is exchanged over the station bus between thedistributed IEDs. The problem that arises, even at a high speed of communication,is a space of time during which the information about the position of the switchingdevices are uncertain. The interlocking function uses this information forevaluation, which means that also the interlocking conditions are uncertain.To ensure that the interlocking information is correct at the time of operation, aunique reservation method is available in the IEDs. With this reservation method,the bay that wants the reservation sends a reservation request to other bays and thenwaits for a reservation granted signal from the other bays. Actual positionSection 12 1MRK 506 375-UEN AControl246 Railway application RER670 2.2 IECApplication manual
