Appendices
ESERV-M12T Modbus Gateway
60
ESERV-M12T
(Rev. 1210)
GLOSSARY
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
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
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
Summary of Contents for ESERV-M12T
Page 1: ...ESERV M12T Modbus Gateway User Manual...
Page 12: ...Hardware ESERV M12T Modbus Gateway 7 ESERV M12T Rev 1210 Figure 9 ESERV M12T DIN Clips...
Page 40: ...Modbus Help ESERV M12T Modbus Gateway 35 ESERV M12T Rev 1210 Figure 24 Modbus Priority...
Page 46: ...Modbus Help ESERV M12T Modbus Gateway 41 ESERV M12T Rev 1210 Figure 31 Port 1 Modbus...
Page 48: ...Modbus Help ESERV M12T Modbus Gateway 43 ESERV M12T Rev 1210 Figure 33 Modbus Slave ID Routing...
