Table 11: Alarm indications
LED state Description
Off Normal operation. All activation signals are off.
On • Non-latched mode: activation signal is still on.
• Latched mode: activation signal is still on, or it is off but has not
been acknowledged.
• Latched flashing mode: activation signal is still on but has been
acknowledged.
3.2.4.2 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.
Changing the function block on or off affects the visibility of its
parameters in the menu.
Changing the value of certain relay parameters affects the visibility
or range of other parameters in the menu. This indicates which
parameters or parameter values become obsolete due to the change.
The relay changes the visibility or range of these parameters
immediately even before the changed values have been committed.
Some parameters may be hidden because the function is off. In
PCM600 the setting visibility can be switched between “basic” and
“advanced” but this is not supported on the LHMI.
3.2.4.3 Front communication
The protection relay supports a USB front port (micro USB type B) that can be
used to communicate with the relay or to power it up. The USB can be enabled via
Configuration/System/Enable USB.
A micro USB type B cable can be used to connect to the relay. If auxiliary power is
connected to the relay, the USB port works as a communication port. If auxiliary
2NGA000823 A Section 3
REX610 overview
REX610 19
Operation Manual
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