Honeywell HPM, Service

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2 Equipment Description
2.28 UCN Node Address Pinning
164 HPM High-Performance Process Manager Service R688
Honeywell December 2020
2.28 UCN Node Address Pinning
Introduction
The UCN node address on the card file backpanel is configured in the factory, but the node address can
be changed or require verification in the field during installation.
One or two HPMM card files
A High-Performance Process Manager cabinet can have one or two (if redundant) card files that contain
HPMMs, and possibly none or several card files that contain only IOPs. A card file that contains an
HPMM must always be configured (pinned) for a UCN node address. The UCN node address pinning of
a card file that contains only IOPs is ignored (not used).
Odd address pinning
The UCN node address for an HPMM is always configured as an odd number. The odd UCN node
address is the address of the primary HPMM. The next consecutive address (even) is reserved for the
secondary HPMM, whether physically present or not. For example, a UCN node address of 11 for the
High-Performance Process Manager is odd, which is acceptable. A node address of 8 is even and is
unacceptable for a primary HPMM.
Whether a card file contains the primary or secondary (redundant) High-Performance Process Manager
Module (HPMM), it must always be configured (pinned) for the primary HPMM UCN node address,
which is an odd number. Software takes care of the even node number for the backup HPMM.
Secondary HPMM determination
The system software logically determines the primary and secondary HPMM, either automatically or by
System Console intervention.
Two methods of pinning
Two methods of UCN node address pinning are described later in this section. The HPM files normally
use jumpers to define (pin) the UCN node address. Zero-ohm resistors (used in place of jumpers) are
soldered in at the factory only by special request.