Modbus™ is an industrial communication protocol developed in 1979 used to establish master slave/client server communication between intelligent devices. It is the most widely used network protocol
in the industrial manufacturing environment.
Modbus™ TCP/IP (Ethernet) is the common transport protocol of the internet and Modbus™ TCP/IP can provide a reliable data transport mechanism between machines. Ethernet has become the standard of corporate enterprises
and is becoming more common for factory networking. Using Ethernet TCP/IP in the factory allows true integration with the corporate intranet and systems that support the factory.
Advantage has implemented Modbus™ TCP/IP on several instruments. As shown below, left to right, Sentra Temptender, Sentra G, Sentra HE, Regal HE, Maximum HE and Multizone MZC-3 instruments. The physical connection is made using the standard RS-485 port.
A circuit board is attached to the standard instrument to convert the ModbusTM RTU to ModbusTM TCP/IP. An industrial grade
RJ45/IP67 connector is generally provided on the unit to easily connect to the plant network. A variety of connectors can be supplied to meet customer needs and facility standards.
The Modbus™ RTU and Modbus™ TCP/IP interface allows the instrument to communicate with a variety of devices including primary processing equipment controls, PLC's and many more. Modbus™ can
communicate information including setpoint, retransmit of setpoint, actual temperature, deviation alarm, sensor failure and remote start / stop. (Remote start/stop is not available on Multizone MZC instruments.)
The Modbus™ TCP interface can be configured to any user IP/Subnet. Configuration is achieved using a utility program that runs on Windows™ based PC's.
Advantage instrument with Modbus͐2 TCP/IP add-on circuit board.
Close up view of the Modbus™ TCP/IP connection and circuit board.
Example of industrial grade RJ45/IP67 port connection for Modbus™ TCP/IP network interface.
RS-485 communications port used on Advantage instruments for SPI and Modbus™ RTU communications.
For more information about Modbus Communications and Components call the Advantage Sales Department at 317-887-0729.
Modbus / TCP Register Definitions
Sentra Temptender, Sentra G and Sentra HE Instruments
Regal HE Instrument
Multizone III (MZC III) Instrument
Would you like to Download FYI #277 to your browser?
Need Application Assistance?
Our Experienced Team Can Save You Time & Money.
Tell Us About Your Project
In Business since 1977
Advantage Engineering, Inc. 525 East Stop 18 Road Greenwood, IN 46143 317-887-0729
Privacy Statement: we will not sell, rent or release any personal information you share with us to third party vendors.
Product innovation and improvement is our constant goal. All features, specifications and pricing are subject to change without notice or liability.