The Menu Database contains tables of possible events, and shows how the contents of the above fields areinterpreted. Fault and Maintenance records return a Courier Type 3 event, which contains the above fields plus twoadditional fields:● Event extraction column● Event numberThese events contain additional information, which is extracted from the IED using column B4. Row 01 contains aSelect Record setting that allows the fault or maintenance record to be selected. This setting should be set to theevent number value returned in the record. The extended data can be extracted from the IED by uploading the textand data from the column.7.1.6 DISTURBANCE RECORD EXTRACTIONThe stored disturbance records are accessible through the Courier interface. The records are extracted usingcolumn (B4).The Select Record cell can be used to select the record to be extracted. Record 0 is the oldest non-extractedrecord. Older records which have been already been extracted are assigned positive values, while younger recordsare assigned negative values. To help automatic extraction through the rear port, the IED sets the Disturbance bitof the Status byte, whenever there are non-extracted disturbance records.Once a record has been selected, using the above cell, the time and date of the record can be read from theTrigger Time cell (B402). The disturbance record can be extracted using the block transfer mechanism from cellB40B and saved in the COMTRADE format. The settings application software software automatically does this.7.1.7 PROGRAMMABLE SCHEME LOGIC SETTINGSThe programmable scheme logic (PSL) settings can be uploaded from and downloaded to the IED using the blocktransfer mechanism.The following cells are used to perform the extraction:● Domain cell (B204): Used to select either PSL settings (upload or download) or PSL configuration data(upload only)● Sub-Domain cell (B208): Used to select the Protection Setting Group to be uploaded or downloaded.● Version cell (B20C): Used on a download to check the compatibility of the file to be downloaded.● Transfer Mode cell (B21C): Used to set up the transfer process.● Data Transfer cell (B120): Used to perform upload or download.The PSL settings can be uploaded and downloaded to and from the IED using this mechanism. The settingsapplication software must be used to edit the settings. It also performs checks on the validity of the settings beforethey are transferred to the IED.7.1.8 TIME SYNCHRONISATIONThe time and date can be set using the time synchronization feature of the Courier protocol. The device will correctfor the transmission delay. The time synchronization message may be sent as either a global command or to anyindividual IED address. If the time synchronization message is sent to an individual address, then the device willrespond with a confirm message. If sent as a global command, the (same) command must be sent twice. A timesynchronization Courier event will be generated/produced whether the time-synchronization message is sent as aglobal command or to any individual IED address.If the clock is being synchronized using the IRIG-B input then it will not be possible to set the device time using theCourier interface. An attempt to set the time using the interface will cause the device to create an event with thecurrent date and time taken from the IRIG-B synchronized internal clock.P446SV Chapter 21 - CommunicationsP446SV-TM-EN-1 543
