4 Fault Isolation
4.9 HPMM Alphanumeric Display
358 HPM High-Performance Process Manager Service R688
Honeywell December 2020
4.9 HPMM Alphanumeric Display
Introduction
The High-Performance Comm/Control card has a four character alphanumeric display at the front of the
card that provides the following types of diagnostic information.
Runtime Operation – Provides indication of normal HPMM operation which includes the HPMM
state, primary/secondary status, and UCN node address (number).
Failure Status – Display startup, or UCN load or Runtime failure status information
Cold/Warm Startup Diagnostics – Displays the STRT status during the startup diagnostic tests,
system bootstrap operations, and software integrated checks.
Detailed Display switch
The amount of detailed information that is displayed can be conditionally enabled by the use of the
Detailed Display switch that is located in a recess behind the front panel on the High-Performance
Comm/Control card. Use of the switch determines whether detailed information such as test sequence
numbers or non-detailed messages that indicate the general phase of HPMM
validation/transition/operation. In general, the Detailed-display switch is used primarily for detailed Hard
failure analysis.
Rapidly changing of display contents
When the Detailed Display mode (switch) is enabled, the alphanumeric display will frequently show a
rapidly changing display content as the various detailed sequences are cycled through. It is impossible to
distinguish each unique sequence number displayed. The value lies in the test number/indication
displayed when a particular sequence fails to complete (hangs).
Detailed HPMM sequence tables are provided in subsection “HPMM Alphanumeric Display” (“Fault
Isolation” section).
Alphanumeric Display Format
The High-Performance Comm/Control card has a four digit alphanumeric display. Generally, the left one
or two most significant positions on the display indicate the state of the HPMM with alpha characters,
and the right two positions on the display indicate either a test sequence number or a UCN node number
with numeric characters. In addition, there are generic text messages that describe the overall phase of
the HPMM.
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