Using ERSC Add On Instructions (AOI) with RSLogix 5000
Publication ERSC-1521 Rev 1.0 – February 2019
For our example, we added a N.C. contact for the module’s “ConnectionFaulted” tag, a N.C. contact for the AOI’s
tag that indicates that the module is not enabled, and a N.O. contact for the programmer’s “System_OK_to_Run”
condition as previously described. When t
his logic becomes true, then AOI’s input to “EnableModule” is
energized. When the module becomes enabled, the “ModuleEnabled” contact becomes true so that the
“EnableModule” input to the AOI does not need to be held ON to keep the module enabled.
Simply repeat this rung of logic for each instance of the AOI. Also, these same tags are utilized for both the ZPA and
PLC I/O AOIs, so this same type of rung is needed to enable both module modes of operation.
If you do not include some logic to set the “O_EnableModule” bit in your
program, the Ai2 module will NOT respond to any data written to it by
the PLC.
Please note that even if the Ai2 module is not enabled, your PLC should
still receive input data from the module
To Next Page
Loading...