Table 14: 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.
5.1.4.2 Parameter management
The LHMI is used to access the IED 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.
5.1.4.3 Front communication
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.
Section 5 1MRK 505 291-UEN A
Local human-machine interface
82
Application manual
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