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10. Glossary VlinxMESR9xx Modbus Gateway

Page 79 Manual Documentation Number MESR9xx-2113m

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Term

Definition

ADU

Application Data Unit

ASCII

American Standard Code for Information Interchange

Baud Rate

Number of bits per second

CRC

Cyclical Redundancy Checking

Data Bits

Number of bits per byte, normally 7 with Modbus ASCII, and 8 with

Modbus RTU

DHCP

Dynamic Host Configuration Protocol

Flow Control

The process of managing the rate of data transmission between two nodes.

Function Code

A code field that tells the Gateway what kind of action to perform

Modbus

Gateway

A bridge to get from Modbus TCP to Modbus Serial

GUI

Graphical User Interface

Internet Protocol

IPv4

Internet Protocol version 4

LED

Light emitting diode. Used as a visual indicator

MBAP

MODBUS Application Protocol

MEI

Multi Electrical Interface via RS-232/422/485

MES1A

B&B’s Ethernet Modbus gateway, RS-232 on serial port

MES1B

B&B’s Ethernet Modbus gateway, RS-422/485 on serial port

MESR922T

B&B’s Ethernet Modbus gateway, Dual Ethernet ports, Dual serial ports

with MIE and terminal blocks

Modbus

A request/reply protocol and offers services specified by function codes.

Parity Bit

A binary digit that is added to ensure that the number of bits with value of

one in a given set of bits is always even or odd. It may also be a Mark (1), or

a Space (0).

PDU

Protocol Data Unit

1 2 ... 78 79 80 81 82 83 84

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