ABB RELION REX640, Technical Manual, Page: 46 / 1960

Figure 3: Example of a local HMI page
The LHMI presents pages in two categories.
• Operator pages are typically required as a part of an operator’s normal activities,
such as a single-line diagram, controls, measurements, events or alarms
• Engineer pages are specifically designed pages supporting relay
parametrization, troubleshooting, testing and commissioning activities
The Operator pages can be scrolled either by pressing the Home button or by
swiping the actual pages. The Engineer pages are accessible by tapping the menu
button in the menu bar on the top of the LHMI display.
The Home button indicates the relay’s status at a glance. In normal situations, the
Home button shows a steady green light. Any other situation that requires the
operator’s attention is indicated with a flashing light, a red light or a combination of
these.
Table 4: Power supply module Ready LED and local HMI Home button LED
State Power supply
module Ready
LED
LHMI Home
button
Alarm
acknowledged
Relay under normal operation and
LHMI connected
Steady green Steady green N/A
Relay’s IRF activated, but communi-
cates with LHMI
High frequency
blinking green
1
High frequency
blinking red
1
N/A
Table continues on the next page
1
High frequency = 3 Hz
REX640 overview 1MRS759142 F
46 REX640
Technical Manual