Rockwell Automation 1769-OF4 Compact Analog Output Module - Manual (Page 36)

36 Publication 1769-UM020A-EN-P - December 2009
Chapter 3 Module Data, Status, and Channel Configuration
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 Value word to the appropriate analog output for the
range selected.
Fault Value
Use each output channel’s fault value word to set the analog values
for the outputs to assume when the system enters the Fault mode.
Valid values depend 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 of the full range for the output type/range
and data format selected, or outside of the limits set by the channel’s
low and high clamp values, the module generates a configuration
error. The default value is 0.
Program to Fault Enable (PFE)
If a system currently in Program mode faults, this setting determines
whether the program or fault value is applied to the output. If the
selection is enabled (PFE = 1), the module applies the Fault mode
data value. If the selection is disabled (PFE = 0), the module applies
the Program mode data value. The default setting is disabled.
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.
TIP
N
Not all controllers support alternate output states and this
function. Refer to your controller’s user manual for details.
TIP
N
Not all controllers support alternate output states and this
function. Refer to your controller’s user manual for details.