Rockwell Automation 1769-OF4 Compact Analog Output Module - Manual (Page 12)

12 Publication 1769-UM020A-EN-P - December 2009
Chapter 1 Overview
The channel status words are described in the Input Data File on
page 31 .
The controller uses two’s complement binary data when
communicating with the module. This typically occurs at the end of
the program scan or when commanded by the control program. If the
controller and the module determine that the bus data transfer was
made without error, the input data is used in your control program
and the output data is used by the module.
No field calibration is required.