Table 6:Alarm indicationsLED state DescriptionOff 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 hasnot been acknowledged.• LatchedAck-F-S sequence: The indication has been acknowledged, but the activationsignal is still on.• LatchedAck-S-F sequence: The activation signal is on, or it is off but the indication hasnot been acknowledged.• LatchedReset-S sequence: The activation signal is on, or it is off but the indication hasnot 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 hasnot been acknowledged.• LatchedAck-S-F sequence: The indication has been acknowledged, but the activationsignal is still on.5.1.4.2 Parameter managementThe LHMI is used to access the IED parameters. Three types of parameters can be read andwritten.• Numerical values• String values• Enumerated valuesNumerical values are presented either in integer or in decimal format with minimum andmaximum values. Character strings can be edited character by character. Enumeratedvalues have a predefined set of selectable values.5.1.4.3 Front communicationThe 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 theport.1MRK 506 334-UUS A Section 5Local human-machine interface111Application manual
