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Communication network: A physical standard for wiring and interconnection of
communicating devices. A communication network standard usually includes
specifications of voltages, maximum cable-run lengths, shielding, termination,
and cable requirements. RS485 and Ethernet are examples of communication-
network standards.
Communication protocol: A language or convention used for reliable
transmission and reception of binary data. A communication protocol is often
independent of the physical method or network used for transmission. Modbus
RTU and TCP/IP are examples of communication protocol standards.
DDE Server: A software application that typically runs in the background,
gathering information from the network and providing the information in DDE
format for use by one or more applications. The PMCS DDE Server is included
in the PMCS Network & Device Configurator and comes in versions optimized
for Ethernet TCP/IP or RS485 Modbus RTU networks.
DDE: Dynamic Data Exchange. A Microsoft Windows standard for efficient
sharing of data between applications on the same PC. See also NetDDE.
Ethernet Gateway: A POWER LEADER device used to connect four RS485
Modbus RTU networks to an Ethernet TCP/IP network. The Gateway increases
performance of a PMCS system through multiple Modbus networks and reduces
overall wiring costs through reuse of existing Ethernet LAN wiring.
Ethernet: An industry-standard communication network commonly used for
local-area networks (LANs) of PCs. Ethernet PMCS systems provide very high-
speed, reliable communications at 10 megabits per second.
Event Logger: A standard PMCS application that efficiently analyzes, sorts, and
logs unusual system behavior such as circuit breaker trips, undervoltages, and
overcurrents. Extensive data-logging capabilities make it a useful tool for
analyzing and predicting system maintenance patterns.
Host PC: The PC running the PMCS DDE Server is referred to as the Host PC.
All other PCs running PMCS client programs are referred to as Viewer
Workstations or networked PCs.
Interface Toolkit: An optional PMCS tool used to quickly generate accurate and
friendly graphical user interfaces. The Interface Toolkit provides dozens of
wizards to efficiently create intelligent one-line diagrams, equipment elevation
views, floor plans, 3D virtual-faceplate views, and tabular displays.
Modbus Concentrator: A POWER LEADER device used to connect eight
commnet networks to an RS485 Modbus RTU network. The Concentrator
provides full compatibility between the PMCS software and the extensive line
of POWER LEADER devices with commnet communications, as well as simple
expansion of a RS485 Modbus RTU network to up to 247 devices.
Modbus RTU: An industry-standard, nonproprietary communications protocol
typically used in medium-speed networks (up to 38.4 kpbs) on RS485.
Multinet: Multinet is an Ethernet communications module that allows
connection for up to 32 ModBus devices, providing ModBus TCP/IP
communications for these devices over Ethernet. This allows connection to
Fiber Optic LAN and WAN systems for remote access to data
NetBEUI: A network protocol usually used in small, department-size local-area
networks of 1 to 200 clients.
CIMPLICITY PMCS Read-This-Book-First Getting Started • 11