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Chapter 8 Diagnostics and Fault Clearing
This chapter describes the diagnostics capabilities of the Remote I/O Scanner, and
explains how faults on a remote drop can be cleared from a Hand–held Monitor or
programmer.
Overview
The Remote I/O Scanner receives all standard Series 90–70 board–level diagnostics
from modules in the remote drop. These faults can be viewed and cleared from a
programmer fault table, or using a Genius Hand–held Monitor.
In addition, the Remote I/O Scanner itself provides the following diagnostics:
Device Number conflict
Loss of communications
Loss of controllers
EPROM fault
RAM fault
Processor fault
Maximum Number of Uncleared Faults
The Remote I/O Scanner can store up to 64 uncleared faults at a time. Faults are stored
in time sequence. If a 65th fault occurs, it will replace the oldest fault currently stored
in the table. The replaced fault is lost.