B&B Electronics Vlinx MESR9xx - Manual (Page 61)

10. Glossary Vlinx MESR9xx Modbus Gateway
Page 57 Manual Documentation Number MESR9xx-4508m
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Term Definition
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
RS-232
Interface between Data Terminal Equipment and Data Circuit-Terminating
Equipment Employing Serial Binary Data Interchange
RS-422
Electrical Characteristics of Generators and Receivers for Use in Balanced
Digital Point to Point Systems
RS-485
Electrical Characteristics of Generators and Receivers for Use in Balanced
Digital Multipoint Systems
RTU Remote Terminal Unit
Stop Bit
Number of bit times after a character is transmitted before the next character
can start transmission.
TCP Transmission Control Protocol
Unit ID Unit Identifier. This is the same as the slaves address.
VESR B&B’s Second Generation Ethernet Gateway Line
Vlinx B&B’s family name for the Gateway line