Instruction Manual

Rockwell Automation Publication 1769-UM006E-EN-P - July 2013 43
Module Operation Chapter 2
Program to Fault Enable (PFE)
The ProgToFaultEn bit lets you select which data value (Program Value or Fault
Value) to apply to the output when the Output State Logic state Prog_HLS
changes to indicate Fault_HLS.
If PFE is 0, the module leaves the Program value applied. If PFE is set to 1, the
Fault value is applied.
The module’s Default Safe State configuration is all zeros, resulting in the
following:
• Program State = UDSS
• Program Value = OFF
• Program State Run = No
• Fault State = UDSS
• Fault Value = OFF
• Fault State Run = No
• PFE = leave program value applied
Output Control Example
The following example illustrates the module’s output control flow. The
following conditions are reflected in the
Output Control Example on page 44:
• Range 0 is enabled and active.
• Range 1 is disabled.
• Range 2 is enabled but not active.
• An overcurrent condition exists on real output 3.
• OvercurrentLatchOff is set.
• The system is in Run mode.
TIP
If the module is in a safe state such as Program or Fault which is
configured to turn an output ON and excessive current is drawn from the
output, the output will still turn off according to the programmed
OverCurrentLatchOff bit configuration.