12. Human Machine
interface
Local HMI
GUID-DA949D6F-070D-4D84-82AC-6791EF64F84F V1 EN
Figure 4. Local human-machine interface
The LHMI of the IED contains the following
elements:
• Display (LCD)
• Buttons
• LED indicators
• Communication port
The LHMI is used for setting, monitoring and
controlling .
The Local human machine interface, LHMI
includes a graphical monochrome LCD with a
resolution of 320x240 pixels. The character size
may vary depending on selected language. The
amount of characters and rows fitting the view
depends on the character size and the view
that is shown.
The LHMI can be detached from the main unit.
The detached LHMI can be wall mounted up to
a distance of five meters from the main unit.
The units are connected with the Ethernet
cable included in the delivery.
The LHMI is simple and easy to understand.
The whole front plate is divided into zones,
each with a well-defined functionality:
• Status indication LEDs
• Alarm indication LEDs which can indicate
three states with the colors green, yellow
and red, with user printable label. All LEDs
are configurable from the PCM600 tool
• Liquid crystal display (LCD)
• Keypad with push buttons for control and
navigation purposes, switch for selection
between local and remote control and reset
• Five user programmable function buttons
• An isolated RJ45 communication port for
PCM600
13. Basic IED functions
Self supervision with internal event
list
The Self supervision with internal event list
(INTERRSIG and SELFSUPEVLST) function
reacts to internal system events generated by
the different built-in self-supervision elements.
The internal events are saved in an internal
event list.
Time synchronization
Use time synchronization to achieve a common
time base for the IEDs in a protection and
control system. This makes comparison of
events and disturbance data between all IEDs
in the system possible.
Time-tagging of internal events and
disturbances are an excellent help when
evaluating faults. Without time synchronization,
only the events within the IED can be
compared to one another. With time
synchronization, events and disturbances
within the entire station, and even between line
ends, can be compared during evaluation.
Breaker protection REQ650 ANSI
1MRK 505 269-BUS -
Product version: 1.1
Issued: April 2011
ABB
27
