Table 572:Explanations of internal signalsName of signal Reasons for activationInternal Fail This signal will be active if one or more of the following internalsignals are active; Real Time Clock Error, Runtime App Error,Runtime Exec Error, SW Watchdog Error, File System ErrorInternal Warning This signal will be active if one or more of the following internalsignals are active; IEC 61850 Error, DNP3 ErrorReal Time Clock Error This signal will be active if there is a hardware error with the realtime clock.Time Synch Error This signal will be active when the source of the timesynchronization is lost, or when the time system has to make atime reset.Runtime Exec Error This signal will be active if the Runtime Engine failed to do someactions with the application threads. The actions can be loading ofsettings or parameters for components, changing of settinggroups, loading or unloading of application threads.IEC61850 Error This signal will be active if the IEC 61850 stack did not succeed insome actions like reading IEC 61850 configuration, startup, forexample.SW Watchdog Error This signal will be activated when the IED has been under tooheavy load for at least 5 minutes. The operating systemsbackground task is used for the measurements.Runtime App Error This signal will be active if one or more of the application threadsare not in the state that Runtime Engine expects. The states canbe CREATED, INITIALIZED, RUNNING, for example.Setting(s) Changed This signal will generate an internal event to the internal event listif any setting(s) is changed.Setting Group(s) Changed This signal will generate an internal event to the Internal Event Listif any setting group(s) is changed.Change Lock This signal will generate an internal Event to the Internal EventList if the Change Lock status is changedFile System Error This signal will be active if both the working file and the backup fileare corrupted and cannot be recovered.DNP3 Error This signal will be active when DNP3 detects any configurationerror during startup.17.1.4.2 Run-time modelThe analog signals to the A/D converter is internally distributed into two differentconverters, one with low amplification and one with high amplification, see Figure 347.Section 17 1MRK 506 335-UUS ABasic IED functions744Technical manual
