Section 4 Understand the local human-
machine interface
About this chapter
This chapter describes the display, its keys (buttons) and LEDs that make up the HMI.
How the keys are used to navigate the HMI, how to interpret the graphic information
on the LCD and, what the LEDs indicate is explained in the sections that follow.
4.1
Overview
The human machine interface is used to monitor and to some extent control the way
the IED operates. The configuration designer can add functions that alert to events
requiring the attention of the operator.
Figure 1:
1/2 x 19” case and 1/1 x 19” case with small and medium LCDs
Section 4
Understand the local human-machine interface
RET 670
Operator's manual
1MRK504049-UEN rev. D
17
