Omron NT15S, Руководство по эксплуатации

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83
Standard Mode
Section 4-6
If you need a width of more than 54 pixels, you can output several curves directly
adjacent to one another.
Fig. 7: Example of a curve representation
The height information, in other words the variable values, is read from the controll-
er in a contiguous field by means of one read job. The height information in the field
element with the starting address
(a 0) is displayed on the far left. All
subsequent height information ( a n) is shifted one pixel position to the
right. The curve height information is refreshed cyclically.
The output is thereby deleted and written again one pixel at a time.
Only two parameters are required to represent a curve:
-
Curve width as a multiple of the character width (normal font)
- Curve height as a multiple of the character height (normal font)
4.6.2 Input Variables
Input variables, when displayed for the first time (when the mask is activated), are
treated in the same way as one-time output variables, i. e. the same representation
options are available. This includes the scaling effect.
Scaling is performed on the value in the PLC.
Input variables can be modified in the terminal by means of Editors. Their function-
ality is determined by the type of Editor that is selected.
The Editors that are supported for variable input are the same as those supported
for variable output. Editing of the variables is subject to certain conditions which
must take into consideration by the user when creating the project, such as the
password protection and the external data release, for example.
The following must be observed when entering timers and counters:
Timer
When writing to a timer variable, any scaling that may have been performed is first
reversed to give the time value to the base 10 ms again. The BCD-coded value is
then calculated so that the lowest possible time base is used.
Avoid writing to a timer word in the PLC, as this has uncontrolled results on
the control bits.