User manual

Publication 1756-RM093F-EN-P - January 2010 71
Monitor Status and Handle Faults Chapter 7
Ladder Logic Example 1
0
/
Node30:I.InputStatus
L
Node30InputsFaulted
/
Node31:I.CombinedStatus
L
Node31InputsFaulted
1
FaultReset
ONS
InputFaultResetOneShot Node30:I.InputStatus
U
Node30InputsFaulted
Node31:I.CombinedStatus
U
Node31InputsFaulted
2
Node30InputsFaulted
U
Node30:I.Pt00Data
U
Node30:I.Pt01Data
U
Node30:I.Pt07Data
3
Node31InputsFaulted
U
Node31:I.Pt00Data
U
Node31:I.Pt01Data
4
Node30InputsFaulted
L
Node30:I.Pt01Data
L
Node30:I.Pt03Data
U
Node31:I.Pt11Data
Node 30 is an 8-point input/8-point output combination module.
Node 31 is a 12-point input module.
If the input status is not OK, then latch the inputs faulted indication.
If the raising edge of the fault reset signal is detected and the input status is OK, then unlatch the inputs faulted indication.
If the inputs are faulted, then overwrite the input tags with safety state values.
If the inputs are faulted, then overwrite the input tags with safety state values.
If the inputs faulted indication is true, then set the Diverse input values to their safety state (1).