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4.4.2
Fault Contact
A Fault contact (FAULT) detects faults in discrete or analog reference addresses, or locates faults
(rack, slot, bus, module).
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 variable with a FAULT/NOFLT
■
contact.
Note: The fault indication of a given module is cleared when the associated fault is cleared from the
fault table.
For I/O point fault reporting, you must enable point fault references in Hardware Configuration.
■
FAULT passes power flow if its associated variable or location has a point fault.
Operands
Parameter Description
The variable associated with the
BWVAR
FAULT 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
93
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