ABB Symphony Harmony Series - Glossary of Terms and Abbreviations

Document Conventions
WBPEEUI240774A0 1 - 5
3. Refer to the troubleshooting section to resolve problems if
they occur.
4. Refer to the maintenance section for scheduled mainte-
nance requirements.
5. Refer to the repair and replacement procedures to replace a
module.
Document Conventions
The ? in the nomenclature or in a part number indicates a vari-
able 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.
Table 1-1. G lossary of Terms and Abb reviatio ns
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 nati o n
unit
Provides input/output connection between plant equipment and the Harmony rack
modules.
TU Termination unit.