Operating Principle Of The Button - Beckhoff CX2100-0004 Manual

6.2

Operating principle of the button

The CX1100-0xx4 power supply units all have four navigation switches and an Enter button. The buttons can
therefore be used to input five basic states
Button
UP
DOWN
LEFT
Combined inputs, such as UP + RIGHT or UP + RIGHT + ENTER can also be entered. Each value is made
available separately as a boolean value and can be linked in the PLC.
The values of the button can be assessed as a numerical value via a TwinCAT function. A combination of
the buttons can also be assessed via the value. The register can be accessed from within a PLC program,
and the value can be assessed. This requires a variable of type USINT first to be created in the PLC
program. This is then called as a parameter in the 'F_CXNaviSwitchUSB' function. The code fragment shows
the declaration of the required variables.
PROGRAM MAIN
VAR
bUp AT %I* : BOOL;
bDown AT %I* : BOOL;
bLeft AT %I* : BOOL;
bRight AT %I* : BOOL;
bEnter AT %I* : BOOL;
bToggle AT %I* : BOOL;
Taster : USINT; (* als Summenwert *)
eNaviSwitchCx2 : E_CX2100_NaviSwitch;
END_VAR
CX2100-0004
Value
4
8
16
Version: 1.2
Button
RIGHT
ENTER / SELECT
Configuration
Value
32
64
33