Parameter Management; Front Communication - Hitachi Relion 670 Series Operation Manual

Section 4
Overview
Table 9:
LED state
Disabled
Enabled
Flashing
4.1.4.3

Parameter management

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.
4.1.4.4

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.
• The yellow LED is not used; it is always off.
28
Alarm indications
Description
Normal operation. All activation signals are Disabled.
• Follow-S sequence: The activation signal is Enabled.
• LatchedColl-S sequence: The activation signal is Enabled, 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
Enabled.
• LatchedAck-S-F sequence: The activation signal is Enabled, or it is off but the indication has not
been acknowledged.
• LatchedReset-S sequence: The activation signal is Enabled, or it is off but the indication has not
been acknowledged.
• Follow-F sequence: The activation signal is Enabled.
• LatchedAck-F-S sequence: The activation signal is Enabled, 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
Enabled.
© 2017 - 2023 Hitachi Energy. All rights reserved
1MRK500127-UUS Rev. M
GUID-5EE466E3-932B-4311-9FE1-76ECD8D6E245 v9
GUID-FD72A445-C8C1-4BFE-90E3-0AC78AE17C45 v14
670 series
Operation manual