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GFK-0825F 6-1
Diagnostics and Fault Clearing
This chapter describes the diagnostics capabilities of the Bus Interface Unit, and explains how
faults can be cleared from a Hand-held Monitor or programmer.
Diagnostics and Fault Clearing for Intelligent Modules
Diagnostics and Fault Clearing for the BIU and Conventional Modules
Display and Clear Faults from a Genius Hand-held Monitor
Display and Clear Faults from a Series 90 PLC
Display and Clear Faults from a Series Five or Series Six PLC
Diagnostics and Fault Clearing for Intelligent Modules
Some types of Field Control modules, for example, RTD and Thermocouple modules, can provide
module and circuit diagnostics in the form of discrete input data. This data can be automatically
sent to the host and used by the host as needed. The content of each type of intelligent module's
diagnostic data is different. Details are given in the module's datasheet.
This diagnostic information is separate from the fault table and fault clearing procedures used by
the BIU and conventional I/O modules. The faults do not count in the total number of faults that
can be stored by the BIU.
The host can clear an intelligent module's diagnostic bits using the module's discrete output bits.
These faults cannot be cleared using a Hand-held Monitor or by sending a Clear Faults datagram.
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