Filter
Top Products
4
73GFK-0827 Chapter 4 Operation
3. faults and failures that are detected in the background.
Faults and failures that are detected immediately are those that are identified within the
current sweep. These faults include I/O data corruption, single bit RAM failures, power
supply failures, processor failures, VME bus failures, and no response from an addressed
module.
Faults and failures that are detected as soon as possible, but not necessarily within the
current sweep, include a group of faults that are detected asynchronously to the PLC
sweep (Genius faults) or those faults that require a timeout larger than one sweep time
to detect the failure. These faults are typically detected within one second and include
all Genius faults (circuit faults, loss of block, etc.)
Faults and failures that are detected in the background can be detected within 30
seconds. These faults include address or data line failures, multiple bit RAM failures,
EPROM failures, and communication device failures.
Changing Fault Category Actions
Fault category actions can be changed for both non-redundant systems and redundant
systems that are not synchronized. When the redundant system is synchronized, the
fault category actions cannot be changed.