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Comtrol Corporation Announces New Modbus/TCP Capabilities for its DeviceMaster Industrial Gateway

MINNEAPOLIS,Minnesota — February 3, 2011—Comtrol® Corporation, a leading manufacturer of industrial device connectivity products, today announced that a significant feature update has been made to the Modbus/TCP firmware for the DeviceMaster® UP product line. The new Modbus/TCP firmware has been designed to provide great flexibility for connecting both Modbus serial slaves and raw/ASCII devices to a variety of Modbus controllers and applications. The new firmware version 5.02 is available via Comtrol’s website. Features of the new Modbus/TCP firmware update include:

  • An industry first Command/Response mode that allows multiple controllers of different types to communicate independently to serial and Ethernet TCP/IP raw/ASCII devices
  • Up to six Ethernet TCP/IP application connections can now be made to serial and Ethernet TCP/IP raw/ASCII devices
  • Modbus/RTU and Modbus/ASCII serial slaves and masters are now fully supported
  • Serial Modbus masters can now communicate to Modbus slaves as well as serial and Ethernet TCP/IP raw/ASCII devices

“With the new Modbus features, customers in the oil and gas industry, the brewery industry, and any SCADA or HMI application user can improve their existing Modbus infrastructure by using serial-connected Modbus PLC’s to connect to serial Modbus slaves, and also to raw/ASCII and TCP/IP devices such as barcode readers and printers anywhere on your network,” said Bradford Beale, President of Comtrol.  “We are confident that these improvements will provide the flexibility that engineers and system integrators need to meet the demands of today’s increasingly diverse Modbus installations.”

About Comtrol Corporation

Comtrol Corporation is an expert network advisor in device connectivity, industrial Ethernet gateways, and intelligent embedded device connectivity products for a wide range of enterprise, industrial, security, power utility, and traffic automation applications. The company’s RocketPort multi‐port serial card, DeviceMaster Ethernet device server, and RocketLinx industrial grade Ethernet and Power over Ethernet switch product lines are sold through regional, national and international distributors and by thousands of resellers and integrators worldwide. For more information, contact Comtrol Corporation at 800‐926‐6876 or visit

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