Program value fault mode (fm), Program value, Fault mode (fm) – Rockwell Automation 1769-IF4FXOF2F Compact Combination Fast Analog I/O Module User Manual

Page 51

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Publication 1769-UM019A-EN-P - October 2008

51

Module Data, Status, and Channel Configuration Chapter 3

Program Value

Use each output channel’s program value word to set the analog
values for the outputs to assume when the system enters the Program
mode. Valid values are dependent upon the type/range and data
format selected for each output channel or the user-defined output
clamp values. If the value you enter is outside the full range for the
output type/range and data format selected, or outside the limits set
by the channel’s low and high clamp values, the module generates a
configuration error. The default value is 0.

Fault Mode (FM)

This configuration selection provides individual Fault mode selection
for the output channels. When this selection is disabled (FM = 0), the
module holds the last state, meaning that the output remains at the
last converted value prior to the condition that caused the control
system to enter the Fault mode.

If this selection is enabled (FM = 1), and the system enters the Fault
mode, the module converts the user-specified value from the
channel’s Fault Mode word to the appropriate analog output for the
range selected.

TIP

N

Not all controllers support alternate output states and this
function. Refer to your controller’s user manual for details.

IMPORTANT

Hold last state is the default condition for the module during a
control system Run-to-Fault mode change.

TIP

N

Not all controllers support alternate output states and this
function. Refer to your controller’s user manual for details.

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