B&B Electronics MESR900 Series - Fiber Models - Manual - Manual (Page 83)

10. Glossary VlinxMESR9xx Modbus Gateway
Page 79 Manual Documentation Number MESR9xx-2113m
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9 9 . . G G l l o o s s s s a a r r y y
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
IP 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