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4.4.4
No Fault Contact
A No Fault (NOFLT) contact detects faults in discrete or analog reference addresses, or locates faults
(rack, slot, bus, module). NOFLT passes power flow if its associated variable or location does not
have a point fault.
To guarantee correct indication of module status, use the reference address (%I, %Q, %AI, %AQ)
■
with the FAULT/NOFLT contacts.
To locate a fault, use the rack, slot, bus, module fault locating system variables with a
■
FAULT/NOFLT contact.
For I/O point fault reporting, you must configure your Hardware Configuration (HWC) to enable
■
the PLC point faults.
Note: The fault indication of a given module is cleared when the associated fault is cleared from the
fault table.
Operands
Parameter Description
BWVAR
The variable associated with the
NOFLT contact
GFK-2950C
Chapter 4. Ladder Diagram (LD) Programming
Allowed Operands
variables in %I, %Q, %AI, and %AQ memories, and
predefined fault-locating references
February 2018
Optional
No
95
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