IEC01000242_2_en.vsd
Activating
signal 2
LED 2
Manual
reset
Activating
signal 1
Automatic
reset
LED 1
Disturbance
tRestart
IEC01000242 V2 EN-US
Figure 28: Operating sequence 6 (LatchedReset-S), manual reset
5.5.3
Function keys
5.5.3.1
Functionality
GUID-BED38E9A-C90D-4B7F-AA20-42821C4F6A1C v3
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.
5.5.3.2
Operation principle
GUID-977C3829-B19B-457E-8A4D-45317226EF22 v3
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.
Operating sequence
GUID-84CA7C61-4F83-4F86-A07F-BF9EC4E309BF v5
The operation mode is set individually for each output, either
OFF, TOGGLE or PULSED.
Setting
OFF
This mode always sets the outputs to a low value (0).
Section 5
1MRK 502 066-UUS B
Local Human-Machine-Interface LHMI
102
Technical manual
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