Screen overview
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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 EZD 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 mask
element functions like the numerical value mask element and
therefore displays the value of the associated set variable.
When you start to enter a value on the EZD 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 EZD activates
an underflow or overflow signal.
The scaling range is used for scaling the value range. The
lower and upper values of the scaling range are assigned to
the lower and upper values of the value range respectively.
The EZD displays the value range if a scaling range has not
been defined.
Examples:
In order, for example, to display the value range (0 to 255) of
a counter as a percentage (0 to 100 %), enter “0” as the
minimum value and “255” as the maximum value in the Value
range field. Enter “%” as the unit of measure. Activate the
Scaling range field and enter “0” as the minimum value and
“100” as the maximum value.
