
Analog Input Modules
(T7420A, AF)
16
Industrial Control Services
Figure
8
. Analog Input Module De
finition.
3) Edit each point:
Position the cursor on a Point definition and choose Edit
from the Module Definition dialog box to define a name
and description for each I/O point. In the Analog Input
Point dialog, enter a tag name (up to 12 characters) and a
description (up to 40 characters). The tag names are used
in the application program to represent the value of the
analog input in your control algorithms and interlocks.
Figure
9
. Defining an Analog Input Point.
Programming
Inputs are referenced in the application program through the
tag names defined in the I/O Configuration Editor. The
analog inputs will range in value from 0 to 4095 over the
voltage range configured for the analog input module. Most
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