Output file 0 and Input file 1 are defined to hold values from physical I/O cards.
All of the data files are presented in much the same way. The Output file holds values that are associated with physical output cards. For a MicroLogix 1100, up to 64 outputs, or four 16-bit output words, can be configured.
The Output file is a special case of a binary file, since each individual output address, or element, represents the binary state of an output.
Another feature of data files is the ability to add a description and symbol for each element.
The other common feature of data files is the ability to display the values in the data file in different formats.