GE Multilin DDFR, Инструкция по эксплуатации

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CHAPTER 4: THE DDFR AND RELAY INFORMATIONCONFIGURING THE EXTERNAL WATCHDOG
DISTRIBUTED DIGITAL FAULT RECORDER – INSTRUCTION MANUAL 77
The reason more than one UR relay should be used to monitor the "heartbeat" is purely for
redundancy purposes. One relay failing to receive the heartbeat signal may indicate a
relay problem, two or three relays failing to receive the heartbeat signal is more likely to
indicate a DDFR problem.
The timing of the External WatchDog heartbeat can be set to 10, 30 or 60-minute intervals
(see below).
4.2.2.2 Adding an External WatchDog
An External WatchDog must be configured in both the DDFR and the relay(s) intended as
the receiver(s) of the WatchDog heartbeat. The following will show the configuration of an
External WatchDog within the DDFR.
Z
Press the Insert key on your KEYBOARD
Each time you press this key, you will add a line to the External
section of the WatchDog window, as shown in Figure 3-13.
Z Each time you add a line, select a UR relay by clicking on the
Device pull-down list located in the cell on that line, and selecting
the appropriate device.
FIGURE 4–7: Selecting a Device (relay)
Z Similarly, select the Virtual Input to be used on the UR relay by
clicking on the Virtual Input pull-down list as shown in Figure 3-
14..
FIGURE 4–8: List of Virtual Inputs on Receiving Device (relay)
Note
Note that because Virtual Inputs are used only on GE UR Series relays only, non-UR
relays are NOT listed in the Device column.