Schneider Electric Modicon BM85 User Manual
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Glossary
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DIO
See Distributed Iā/āO.
DIO Drop Adapter
See DIO Adapter.
Distributed I/O
A Modbus Plus network that consists of hardware components that
are specifically designed for highĆspeed control of Inputā/āOutput
devices at remote sites in an industrial process. Each DIO network
has one Programmable Controller or one Modbus Plus Network
Option Module that operates as the master controlling node on the
network. The DIO network also has one or more DIO Adapters,
placed at the remote plant sites. Up to 64 nodes can be present on
each DIO network, exchanging messages during the passing of
token frames.
download
The transfer of a program from one device to another for execution.
drop cable
A cable used to connect a networked node device to a tap on the
trunk cable. Drop cables are available in various lengths from
Modicon. See tap.
duplicate frame
A frame received twice because an acknowledgement was lost.
end delimiter
A field that defines the end of a message.
EIA
Electronic Industries Association.
field
A logical grouping of contiguous bits that convey one kind of
information, such as the start or end of a message, an address, data,
or an error check.
frame
A logical grouping of contiguous bits for transmission; a message.
frame check sequence
A code that is used to determine whether a frame was received
correctly.