ERL 8700/BUS, User Manual

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3 Using the IED (Getting Started)
3-2 B-PRO User Manual 8700 D01908R02.12
Front Panel Display
The front panel display is the fastest and easiest way of getting informa-
tion from the relay.
Figure 3.1: Front Panel Display
The front panel consists of a display, six LED lights and six push buttons.
LED Lights
View or change settings using Terminal Mode or loading a setting file
from
Offliner Settings.
Date &
Time
VIiew
Readings
View
Logs
Previous Next
Target
Clear
Target
2000 JUL 07 13:22:07
Display LED Lights
Push Buttons
Relay Functional
IRIG-B Functional
Service Required
Test Mode
Alarm
Relay
Functional Indicates when the relay is functional. When the Relay Functional
green LED goes on, the rear Relay Inoperative contact changes to an
open and the protective functions become functional.
IRIG-B
Functional Indicates the presence of a valid IRIG-B time signal where the LED is
on.
Service Required Indicates the relay needs service. This LED can be the same state as
the Relay Functional LED or can be of the opposite state depending on
the nature of the problem.
The following items bring up this LED:
• DSP failure - protection difficulties within the relay.
• Communication failure within the relay
.
• Internal relay problems.
Test Mode Occurs when the relay output contacts are intentionally blocked.
Possible reasons are:
• Relay initialization on startup
• User interface processor has reset and is being tested.
You cannot communicate with the relay through the ports until the front
display becomes active and the TEST MODE LED goes out. Normally,
the red Target LED remains off after this start-up unless the relay had
unviewed target messages.
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