Schneider Electric Modbus Plus Network Bridge Multiplexer none - Manual (Page 102)

92 Glossary
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frame descriptor
A part of the host computer's buffer structure that links
transmitted or received data frames to appropriate priority queues.
Frame Descriptors contain MAC frame parameters, frame status,
and pointers.
Global Input
A type of data input received by a node using Peer Cop data
transfers. Nodes using Peer Cop can be configured to receive up to
32 16Ćbit words of Global Input data from each of up to 64 source
nodes, up to a maximum total of 500 words. Incoming data from
each source node can be indexed into up to eight fields for delivery
into separate data destinations in the receiving node.
Global Output
A type of data output sent by a node using Peer Cop data transfers.
Nodes using Peer Cop can be configured to send up to 32 16Ćbit
words of Global Output data, which is globally broadcast to all
active nodes on the network. Destination nodes can be configured
to accept or ignore incoming data from specific source nodes.
HDLC
HighĆlevel Data Link Control. The part of the device that performs
the protocols for defining the beginning and end of a frame,
synchronizing the frame between sender and receiver, providing
CRC error checking, and defining the portion of the received
information that is to be checked by the CRC.
host computer
A computer which controls other computers and devices. In an
industrial process with networking, the host computer specifies the
current requirements for the operation of remote nodes, and is the
destination for summary data reports about the performance of the
process.
IEC
International Electrical Commission.
IEEE
Institute of Electrical and Electronics Engineers.
ISO
International Standards Organization.