Sepam - HV/MV Protection and control units (ENG) - Trinet

Time tagging of events (cont’d)Time tagging characteristicsDiscrimination of eventsminimum typical maximum2 ms 3 ms 5 msThese figures are given for the externalsynchronization mode with a synchronization timepulse which has a period of 10 s, and accuracyof within less than 1 ms.Time tagging is done as close as possible to the generation of the datato be time tagged.c The logical inputs are time tagged when there is a signal status changeon the connection terminal.c The internal remote annunciation bits are time tagged at the time they changestatus during program logic processing.The figures in the chart opposite concern the time tagging of the logical inputs of thesame Sepam 2000. They are indicated for an external synchronization mode with asynchronization “logical signal” with 10-second period synchronization, with accuracyof less than 1 ms.Internal management of eventsc internal storage capacity: 63 time tagged events,c avalanche of events: 63 simultaneous changes.Processing of oscillating datac appearance: if there are 10 ±3 status changes in 2 seconds,c disappearance: if there are 0 status changes during 10 seconds.External synchronizationThe synchronization time pulse should have a duration of more than 40 ms and lessthan 4 s.If its duration is more than 1 s, its status may be read on the setting terminal.Setting of time taggingparametersCommissioning of the time tagging function requires prior setting of the followingparameters:c choice of the synchronization mode, internal or external,c validation of events for remote annunciation and logical inputs.These settings are accessible via the “time tagging” heading of the setting terminal“Status” menu.The user presses the “code” key on the setting terminal and enters the passwordbefore modifying the parameters.Using the ▼ or ▲, keys, and the “enter” key:c select the “Status” and then “Time tagging” menus,c choose the external synchronization mode and validation of events.Time tagging menuChoice of synchronization modec Network (standard by default),c Logical input I11,c Logical input I21,c Logical input I413,c Logical input I501,according to the Sepam 2000 model.The dynamic status of bits b8, b14 and b16 of the Sepam check-word is displayedin the menu (b8 = C8F7, b14 = C8FD, b15 = C8FE, b16 = C8FF).Validation of eventsDirect input, 0 or 1 for each remote annunciation and logical input.c Not validated (by default): 0c Validated: 1.A value of 1 for each remote annunciation and logical input indicates that the timetagging operations have been validated for the corresponding resources.A value of 0 disables time tagging processing operations (use keys ▼,▲).Modification of these parameters triggers initialization of the Sepam 2000communication function. The parameters are saved in the event of a power failure.24 Jbus/Modbus communication