GE Multilin DDFR, Инструкция по эксплуатации

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66 DISTRIBUTED DIGITAL FAULT RECORDER – INSTRUCTION MANUAL
CONFIGURING THE DDFR WATCHDOGS CHAPTER 3: DDFR CONFIGURATION
question. Similarly, WatchDog information can be directly transferred to the DDFR and
transferred to the appropriate Settings File - using the
Update File from DDFR command,
as shown below.
3.4.1 Types of WatchDog
The DDFR contains three different types of WatchDog, or "health monitor":
Internal (DDFR) WatchDog
Takes corrective action to ensure that the DDFR application is continually running. If the
DDFR application is NOT running for some reason, the Internal Watchdog will attempt to
fix the situation, by, for example, restarting the application.
The Internal Watchdog is not a configurable WatchDog.
DriveSpace WatchDog
Active when the DDFR’s used storage space is nearing maximum capacity. Once the used
storage space meets a certain threshold, automated maintenance occurs and the oldest
records deleted.
External WatchDog
Notifies a UR relay that the DDFR is running.
For UR relays, the External Watchdog causes an action to be performed to notify
management of a "DDFR-not-running" situation. In the UR relay, the Internal Watchdog,
discussed above, thus complements the External Watchdog by initially trying to correct the
problem.
Only the frequency of sending "heartbeat" signals is configurable.
Note
This External WatchDog is discussed in detail in section 4.2.2.
3.4.2 The DDFR Internal WatchDog
The DDFR Internal WatchDog ensures that the DDFR application is continually running. If
the application stops for any reason, the Internal Watchdog causes it to reset. Using the
above "health monitor" idea, the Internal Watchdog is roughly equivalent to trying to cure
the problem with self-medication.