Rockwell Automation 1395 Reel Tension Paster Adapter - Manual (Page 42)

Publication 1395-RTP-5.1 - September 1997
4-2 Troubleshooting
Hard Faults
Hard Faults are nonrecoverable. That is, the 1395 Drive must either
be RESET or POWER-CYCLED in order to clear the faulted
condition. An adapter board transmits a fault to the 1395 Main
Computer Board through the Dual-Port Ram as explained in the 1395
Instruction Manual. A Hard Fault in an adapter is designed to create
an ECOAST stop.
Soft Faults
Soft Faults occur when an adapter detects a condition which may
result in undesirable operation. The adapter takes appropriate action
within its domain to guard against further operation and signals the
condition to the 1395 Drive. In addition, the fault may be cleared and
normal operation resumed at the point the fault occurred.
Warning Faults
Conditions detected within the system that may produce Soft Faults if
the condition is allowed to persist.
Adapter Each processor or adapter provides its own set of sophisticated
diagnostics which the user can examine to help determine the nature
of problems that may arise. Maintenance is done at the board level.
Examining the diagnostic/fault messages available determines
whether a board should be replaced. The malfunctioning board may
be returned to Allen-Bradley for further disposition.
The board mounted LEDs can be of assistance in easily narrowing
down a problem to a specific area. Figure 4-1 depicts the Adapter
decal located on inside door of the Drive. This reference decal should
be used to aid in the location and identification of LED indicators and
other board components. The LEDs DS1, DS2 mounted near the top
of the board indicate the status of the Drive’s main ±12V DC power
supply. Also test points for the supplies are mounted in close
proximity along with analog common so that the actual voltage can be
measured.
The +5 volt supply is combined with the processor OK logic, both
indicated as being OK with the next LED down from the top. Again,
if the +5 volt supply is suspect, it can be measured with respect to
digital common with test points mounted close to the top of the board.
If any of the power supply voltages are out of tolerance, further
troubleshooting is required, such as interconnection wiring checks as
well as actual power supply voltage measurements, at the power
supply.