AN-X2-GENI (AN-X-GENI/B) Page
21
Exchanging Scheduled Data with a ControlLogix
The AN-X2-GENI supports scheduled connections with a ControlLogix processor over
Ethernet.
The AN-X2-GENI behaves like a 17-slot ControlLogix rack with an ENBT/A module in
slot 16 and generic modules in slots 0 to 15.
A ControlLogix processor can open a scheduled connection to each of these 16 generic
modules. Each scheduled connection consists of up to 248 words of output data from the
ControlLogix processor to the AN-X and up to 250 word of input data from the AN-X to
the ControlLogix processor.
Each connection can have a different RPI, up to 750 ms.
In general, keep the number of connections small. There is significant overhead in
opening and maintaining each connection.
You map the inputs and outputs for the Genius blocks to these scheduled connections.
AN-X can create the mappings automatically or you can create a mapping configuration
manually.
You can let AN-X create a mapping file automatically, then edit the file to better suit
your application. For example, in order to make the most efficient use of the available
Ethernet bandwidth, you can organize the data so that items that must update quickly are
mapped to connections with short RPIs and items that are less time critical are mapped to
connections with longer RPIs.
In addition, the AN-X module has diagnostic data that can be mapped to ControlLogix
scheduled input data.
Mapping I/O Data
You map Genius input and output data to the ControlLogix scheduled data by creating a
comma separated variable file that defines the mappings and sending the file to the
AN-X.
The file contains sections for each scheduled connection. Within each scheduled
connection are the definitions for the input and output data for that connection. These
definitions refer to the Genius module where the data is to be found.
When you create a mapping for a Genius module, all the input or output data for the
module is mapped; you cannot map individual registers.
The file also contains options that apply to the whole configuration.
AN-X can automatically create a default mapping file when you autoconfigure I/O. See
page 17 for details.
Anything after a semicolon on a line is treated as a comment.
