Manual

150 Publication 1756-UM009C-EN-P - December 2010
Chapter 7 Non-isolated Analog Output Modules (1756-OF4 and 1756-OF8)
Choose a Data Format
Data format defines the format of channel data sent from the controller to the
module, defines the format of the ‘data echo’ that the module produces, and
determines the features that are available to your application. You choose a
data format when you choose a
Communication Format .
You can choose one of these data formats:
• Integer mode
• Floating point mode
The table shows features that are available in each format.
For details on input and output data formats, see
page 205 in Chapter 10 .
Non-isolated Output
Module Features
The table lists features that are specific to the non-isolated analog
output modules.
You can mix current and voltage outputs on a 1756-OF4 or
1756-OF8 module. Other common features are described in the
following pages.
Features Available in Each Data Format
Data Format Features Available Features Not Available
Integer mode Ramp to program value
Ramp to fault value
Hold for initialization
Hold Last State or User Value in
fault or program mode
Clamping
Ramp in Run mode
Rate and Limit alarms
Scaling
Floating point mode All features N/A
Non-isolated Analog Output Module Features
Feature Page
Ramping/Rate Limiting 151
Hold for Initialization 151
Open Wire Detection 152
Clamping/Limiting 152
Clamp/Limit Alarms 153
Data Echo 153