Alarm indicators
The 15 programmable three-color LEDs are used for alarm indication. An individual alarm/
status signal, connected to any of the LED function blocks, can be assigned to one of the three
LED colors when configuring the IED.
Table 12: Alarm indications
LED state Description
Off Normal operation. All activation signals are off.
On • Follow-S sequence: The activation signal is on.
• LatchedColl-S sequence: The activation signal is on, or it is off but the indication has not
been acknowledged.
• LatchedAck-F-S sequence: The indication has been acknowledged, but the activation
signal is still on.
• LatchedAck-S-F sequence: The activation signal is on, or it is off but the indication has
not been acknowledged.
• LatchedReset-S sequence: The activation signal is on, or it is off but the indication has
not been acknowledged.
Flashing • Follow-F sequence: The activation signal is on.
• LatchedAck-F-S sequence: The activation signal is on, or it is off but the indication has
not been acknowledged.
• LatchedAck-S-F sequence: The indication has been acknowledged, but the activation
signal is still on.
5.4.2 Parameter management
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The LHMI is used to access the relay parameters. Three types of parameters can be read and
written.
• Numerical values
• String values
• Enumerated values
Numerical values are presented either in integer or in decimal format with minimum and
maximum values. Character strings can be edited character by character. Enumerated values
have a predefined set of selectable values.
5.4.3 Front communication
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The RJ-45 port in the LHMI enables front communication.
• The green uplink LED on the left is lit when the cable is successfully connected to the port.
• The yellow LED is not used; it is always off.
1MRK 505 370-UEN D Section 5
Local HMI
Busbar protection REB670 89
Application manual
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