Rockwell Automation 1336T PLC Comm. Adapter, Series B, FRN 2.xx-3.xx - Manual (Page 230)

8–4
Publication 1336 FORCE–5.13 –– September, 1998
All faults that have occurred are shown in the fault queue. Each
entry shows the type of fault and the time and date that the fault
occurred. The fault information stays in BRAM until you clear the
queue by using the Clear Fault Queue command. You cannot clear
the queue by issuing either a Clear Fault or a Drive Reset command
or by recycling the drive power.
The fault queue may contain up to 32 faults. The following
information is provided for each fault listed in the fault queue:
•
a fault queue entry number to indicate the position of the fault in
the fault queue
•
a trip point (TP) to indicate which entry in the fault queue caused
the drive to trip (all faults which are displayed in the queue before
the TP fault occurred after the TP was logged)
•
a five character decimal numbered fault code, which is described
later in this chapter
•
the time and date when the fault occurred
•
descriptive fault text plus all clear fault commands and when they
were executed
The 1336 FORCE monitors both internal and external operating
conditions, responding to conditions that you program as being
incorrect. Most malfunctions that occur will induce one of three
types of faults.
Hard Faults
Hard faults indicate that the 1336 FORCE has detected a malfunction
where internal recovery is not possible. Hard faults are the most
severe type of faults. Hard faults indicate that a major internal
component or system has malfunctioned and that drive functions
may be lost. To recover from a hard fault, you must either issue a
Drive Reset command or recycle the drive power.
Soft Faults
Soft faults exist to protect drive system components from internal
and external malfunctions. Unlike hard faults, in most instances, you
can maintain drive control when a soft fault occurs. Soft faults
indicate that the 1336 FORCE has detected a malfunction that could
damage drive control, power components, or the motor. Soft faults
may also indicate undesirable external operating conditions. You can
recover by issuing a Clear Fault command, a Clear Fault Queue
command, a Drive Reset command, or by recycling the drive power.
Fault Queues
Faults