Rockwell Automation Allen-Bradley Guardmaster 442G-MABE1, Руководство пользователя

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Rockwell Automation Publication 442G-UM002A-EN-P - December 2016 45
Status and Troubleshooting Chapter 4
Clearing Faults
Clearing faults in the access box requires cycling one of the fault reset signals
(GeneralFaultUnlatch or LockSequenceFault Unlatch) as specified in Table 5
on page 44 .
The reset requires a leading and trailing edge of the reset signal within a specific
time frame. The pulse width must be between 10 ms…10 s. If the pulse width is
too short or too long, the reset function is not executed.
Figure 20 - Fault Reset Timing
Multiple Faults
It is highly unlikely that more than one fault will occur at the same time. If a
new fault does occur before a previous fault has been cleared, a new value will
be written to FaultCode deleting the previous one. The DiagnosticActive bit is
set with each fault, but will not change state if the second fault occurs before
the first fault is cleared.
1
0
10 ms to
10 s