3 Using the IED (Getting Started)
3-2
L-PRO 4000 User Manual
D02706R02.30
3.4 Front Panel Display
The front panel display is the fastest and easiest way of getting information
from the relay.
Figure 3.1: Front Panel Display
The display, the 16 LED lights and the 6 push buttons, provide selective infor-
mation about the relay.
LED Lights
6 Push Buttons
Display
16 LED Lights
USB Port 150
Ethernet Port 119
Table 3.2: Description of LED Lights
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.
The user 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.
Alarm
Occurs when an enabled relay function picks up.
The red Alarm LED should be off if there are no inputs to the relay.
If the Alarm LED is on, check the event log messages which are
available through the menu system.
Summary of Contents for L-PRO 4000
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