Document Conventions
WBPEEUI240766B0 1 - 5
Document Conventions
The ? in the nomenclature or in a part number indicates a
variable for that position (e.g., IMMFP1?).
Glossary of Terms and Abbreviations
Table 1-1 contains those terms and abbreviations that are
unique to ABB Automation or have a definition that is different
from standard industry usage.
Reference Documents
Table 1-2 lists ABB Automation instructions for equipment
that is referenced in this instruction.
Tabl e 1-1. Glos sa ry of Terms and Ab breviat ions
Term Definition
Controlway High speed, redundant, peer-to-peer communication link. Used to transfer informa-
tion between intelligent modules within a Harmony control unit.
Cnet Symphony system advanced data communication highway.
FC Function code.
Function code An algorithm which manipulates specific functions. These functions are linked
together to form the control strategy.
I/O expander
bus
Parallel communication bus between the Harmony rack controllers and rack I/O
modules.
Module
mounting unit
A card cage that provides electrical and communication support for Harmony rack
modules.
MMU Module mounting unit. A card cage that provides electrical and communication
support for Harmony rack modules.
Ter mi n ati on
unit
Provides input/output connection between plant equipment and the Harmony rack
modules.
TU Termination unit.
Tabl e 1-2. Refere nc e Doc um ent s
Number Document
WBPEEUI200502?0 Module Mounting Unit (IEMMU11, IEMMU12,
IEMMU21, IEMMU22)
WBPEEUI210504?0 Symphony Function Code Application Manual
WBPEEUI260046?0 Analog Input Termination Unit (NTAI06)
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