User Manual

12/06 AWB2724-1584GB
Description of important
functions / function blocks
79
Example of text and values output
(with the Disp_DisplayElement FB) The display is required to
display the values of the variables “motor1” and “motor2”. The
two values are changed continuously by the user program.
Operations via the PLC inputs
– I1 = FALSE: Status display
– I1 = TRUE: Entry/output mode
– I2 = FALSE: ESC button active
– I2 = TRUE: ESC button disabled
– I3 = TRUE: The first line is shown on the display.
– I5 = TRUE: The third line is shown on the display.
Execution
The example program consists of programs:
• STARTPROGRAM
– The “startprogram” is called on system event “Start”.
– The auxiliary variable g_xFirstCycleAfterStartProgram is set.
•PLC_PRG
– 2 values are incremented.
– The program “Visualisation” is called.
• VISUALIZATION
– Registering and positioning of variables on the display in the
first cycle
– The auxiliary variable g_xFirstCycleAfterStartProgram is
reset.
– Activation of Entry/output mode (I1)
Start display (I3,I5)
Declare variables
X First declare for each text element that you wish to display, such
as “motor1”, a type String variable in the list
“Global_Variables_Display” as shown in the following example
(see also figure 90):
Creating auxiliary variables
X For the first program cycle call “Startprogram” on system event
“Start”.
X Set an auxiliary variable “g_xFirstCycleAfterStartProgram” in
this program that you reset after the first cycle is completed. The
auxiliary variable must be declared globally.a figure 90
Creating the program “StartProgram”
X Write the program “StartProgram” as in a figure 92.
Creating the “PLC_PRG” program
Figure: 89: Example of text and values output
VAR GLOBAL
g_sDisp_String1 :STRING:='Motor1';
END_VAR
Figure: 90: Declaration of display variables
Figure: 91: Defining the system event
Figure: 92: Creating the “startprogram”
PROGRAM PLC_PRG
VAR
fbTimer1 :TON;
(* Display values of the application
*)
byValue :BYTE;
wValue :WORD;
END_VAR
-----------------------------------------------------------
fbTimer1(IN:=NOT fbTimer1.Q , PT:=t#50ms );
IF fbTimer1.Q = TRUE THEN
byValue := byValue + 1;
wValue := wValue + 1;
END_IF
Visualisation(); (* Call visualisation *)