Rockwell Automation MD65 Profibus Communication Card - Manual (Page 99)

Glossary Glossary-1
G
LOSSARY
communications module - Devices such as drives, controllers,
and computers usually require a module to provide a
communication interface between them and a network such as
PROFIBUS. A module reads data on the network and transmits it to
the connected device. It also reads data in the device and transmits
it to the network.
The MDCOMM-PBUS PROFIBUS module is an module that
connects MD65 drives to a PROFIBUS network. Modules are
sometimes also called “adapters,” “cards,” “embedded
communication options,” “gateways,” and “peripherals.”
controller - Also called programmable logic controller. A solid-state
control system that has a user-programmable memory for storage
of instructions to implement specific functions such as I/O control,
logic, timing, counting, report generation, communication,
arithmetic, and data file manipulation. A controller consists of a
central processor, input/output interface, and memory. See also
scanner.
data rate - The data rate is the speed at which data is transferred
on the PROFIBUS network. The available data rates depend on the
type of cable and total cable length used on the network:
MDI - Micro Drive Interface - A modification of the serial
communication protocol used by various Reliance Electric drives
and power products.
MDI peripheral - A device that provides an interface between MDI
and a network or user. Peripheral devices are also referred to as
“modules-.” The serial converter and MD65 OIM are examples of
MDI peripherals.
Baud Rate Maximum Cable Length
9.6 kpbs 1000 m
19.2 kpbs 1000 m
93.75 kpbs 1000 m
187.5 kpbs 1000 m
500 kpbs 400 m
1.5 Mbps 200 m
3 Mbps 100 m
6 Mbps 100 m
12 Mbps 100 m