Function Keys; Functionality; Operation Principle - ABB RET650 Technical Manual

1MRK 504 135-UEN A
5.5.3
5.5.3.1
5.5.3.2
Technical manual
Activating
signal 1
Activating
signal 2
LED 1
LED 2
Automatic
reset
Manual
reset
IEC01000242 V2 EN
Figure 25: Operating sequence 6 (LatchedReset-S), manual reset

Function keys

Functionality

Local Human-Machine-Interface (LHMI) has five function buttons, directly to the left
of the LCD, that can be configured either as menu shortcut or control buttons. Each
button has an indication LED that can be configured in the application configuration.
When used as a menu shortcut, a function button provides a fast way to navigate
between default nodes in the menu tree. When used as a control, the button can control
a binary signal.

Operation principle

Each output on the FNKEYMD1 - FNKEYMD5 function blocks can be controlled
from the LHMI function keys. By pressing a function button on the LHMI, the output
status of the actual function block will change. These binary outputs can in turn be
used to control other function blocks, for example, switch control blocks, binary I/O
outputs etc.
FNKEYMD1 - FNKEYMD5 function block also has a number of settings and
parameters that control the behavior of the function block. These settings and
parameters are normally set using the PST.
Local Human-Machine-Interface LHMI
Disturbance
tRestart
Section 5
IEC01000242_2_en.vsd
75