Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 293)

Publication 1760-UM002B-EN-P - March 2005
Visualization with Pico GFX-70 5-25
Screen 9 - Screen 9 shows an example of how to display a value overflow. The
associated variable is the QV output of timing relay T04. The variable type is
DWord. The timing relay runs from 0 to 4000 ms. A value range from 0 to
3000 and “ms” as unit of measure are defined in the Number range/format
tab. This causes a value overflow as soon as 3000 ms is exceeded. This is
indicated in the display by an overflow signal.
Screen 10 - Screen 10 shows an example of how to display a value underflow.
The associated variable is the QV output of counter C02. The variable type is
DWord. The counter C02 is triggered by a flashing pulse from timing relay
T07. The counter counts down from 12 to 0. A value range from 6 to 12 and
“mm” as unit of measure are defined in the Number range/format tab. This
causes a value underflow as soon as 6 mm is undershot. This is indicated in the
display by an underflow signal.
Value Entry
This screen element enables you to enter numerical setpoint values on the
device during operation and thus make interventions in a process. The process
value is thus entered via the set variable linked in the program. The Pico
GFX-70 saves the entered value internally. The value is processed by the
program and displayed until it is modified again by the operator or the
program. Without an operator entry this screen element functions like the
numerical value screen element and therefore displays the value of the
associated set variable.
When you start to enter a value on the Pico GFX-70 device, the entry field
shows the last variable value. You start the entry by pressing OK. This
activates Selection mode in which you can use the cursor buttons to move
between the value entry elements of a screen. The order of the selected
elements is from the back to the front. This order is defined by their
positioning and can be altered in the toolbar. Pressing OK once more activates
Entry mode.
Value and Scaling Range
The value range defines the range that is to be displayed. If the values are
below or above this range, the Pico GFX-70 activates an underflow or
overflow signal.
TIP
In PicoSoft Pro, the contents of the marker can be viewed
both in decimal and hexadecimal format. Only decimal
format, however, is shown in the display.
Overflow signal
Timer 4
---ms
Underflow signal
Counter 2
-mm