MVI56E-GSC/GSCXT ♦ CompactLogix or MicroLogix Platform Reference
Enhanced Generic ASCII Serial Communication Module User Manual
ProSoft Technology, Inc. Page 107 of 140
April 24, 2017
The ladder logic will change and update these tags as it works its way through
the ladder process. Your application specific process and control logic can
monitor the status or values in these tags as part of you control application; but
should never write values to these tags, as this could cause serious adverse
effects on the module's data processing activity. Incoming data might be lost or
data that should be sent might not be transmitted.
However, the GSC.UTIL.BackplaneFail tag is the one exception to this read-only
rule for these tags. The GSC.UTIL.BackplaneFail tag is used to hold a
configuration value which can be used to control activity on application serial
ports whenever a specified number of successive backplane transfer errors
occur. You are expected to write a value to this tag as part of the module's
configuration. For more details, see GSC.UTIL.BackplaneFail (page 50).
4.5.4 Add-On-Defined Data Types
When you import the Add-On Instruction (AOI) rung , several new Add-On-
Defined Data Types (ADTs) are created for you, as well as the UDTs that were
also created. The ADTs contain special data-types required by the AOI, either for
special logic routines or to define the AOI interface with program logic. ADT
information is organized and contained on several tabs in the Data Types - Add-
On-Defined section of the RSLogix 5000 project tree.
General tab
Parameters tab
Local Tags tab
Scan Modes tab
Change History tab
Help tab
The content and use of each of these tabs will be discussed in more detail in the
following sections.
AOI56GSC - General Tab
The General tab provides:
1 Name of the Add-On Instruction (AOI)
2 Description
3 Type of logic used
4 Revision numbers
5 Revision Notes
6 Vendor ID
This information will help you determine whether or not you are using the latest
version of the AOI and will give you a few notes on what is different about this
version when compared with previous version. It is recommended that you make
no changes to the selections and entries on this tab.
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