7. Maintenance
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Identifying points of I / O with individual diagnostic
After entering the diagnostic mode, the I/O modules indicate which points have individual diagnoses,
flashing the respective I/O segment. For example, if the segment shown in Figure 7-12 is flashing, it
indicates that the second I/O point of the module has an active individual diagnosis. This feature is
useful for rapid detection of individual diagnoses.
Figure 7-12. Diagnostic Example
Accessing I/O points
After entering the diagnostic mode, the next short pressing in the module diagnostics button selects
the first I/O point, this time the display will clear indication of individual active diagnostics
(explained above) and will indicate the selected I/O point. For the selection of the next I/O point
execute a new short pressing in the respective module diagnostic button. When the last I/O point is
selected a new short press on the button will terminate the diagnostic mode.
By accessing an I/O point, the CPU will display the respective I/O point tag and all its active
diagnostic in the same manner as indicated in the flowchart of Figure 7-10.
For modules that do not have I/O points, a new short press on the diagnostic button, after entering the
diagnostic mode, will finalize the operation.
Accessing the module and I/O points description
In addition to the tag, modules and I/O points can have a description. The description is used when
there is a need to add extra information beyond the tags for a given module or I/O point, for example:
"Temperature reading module" for describing a module or "Main pump drive" to describe a particular
output point. The limit for the tag, the tag description or module name is 255 characters.
To change the name and description of each module inserted in the application, click the right button
on the module, under "Properties" in the "Common" tab, change the name or description (limited to
255 characters).
To change the tag, go to the tab "Bus I/O Mapping" of each module, and double-click the column
table to add the point tag. To change the description of the tag, do the same in the column intended
for description tag, and enter the desired information.
To access the description, just perform a long press on the diagnostic button when the module is
indicating the tag or active diagnostics of the module. In this case the CPU will display the module
description. Likewise, when selecting an I/O point and a long press is performed in the diagnostics
button, the description of the I/O point appears on the CPU display.
