Comtrol Modbus TCP User Guide - Manual (Page 8)

8 - Chapter 1. Introduction DeviceMaster UP Modbus/TCP User Guide: 2000447 Rev. I
Product Overview
The following links function if you are reading this document from the ftp site or CD.
Note: Optionally, open the CD and click Modbus. The main page ( up_modbus_family_main.htm ) provides
links to these documents.
• Modbus Controller to Controller Communication
• Modbus Solution Examples
• Providing Read-Only Modbus Protection
• Resolving Modbus Device ID Conflicts
If Modbus Server or Modbus Router is a better solution, you can DOWNLOAD the appropriate firmware and
corresponding documentation.
1.3. Product Overview
The DeviceMaster UP operates as a highly versatile Modbus gateway when the Modbus/TCP firmware is
uploaded to the DeviceMaster UP. The DeviceMaster UP provides Modbus/TCP, Modbus/RTU, Modbus/
ASCII, and Ethernet TCP/IP controller interfaces to both serial and Ethernet TCP/IP raw/ASCII devices, and
both Modbus/RTU and Modbus/ASCII slave devices.
Your particular DeviceMaster UP model may or may not have the Modbus/TCP firmware loaded (depending
on the model you purchased).
Note: Models that have Modbus/TCP loaded on the DeviceMaster UP are identified in PortVision DX and the
DeviceMaster UP is labeled accordingly.
1.4. Modbus/TCP Firmware
The following subsections provide information for existing users who may or may not want to update systems
with the advanced Modbus/TCP firmware 5.0x. For new users, the following subsections provide Modbus
system architecture information.
1.4.1. Traditional Modbus/TCP System Architecture (Firmware V2.x)
Modbus/TCP firmware V2.x provided a traditional Modbus/TCP slave interface to devices through a raw/
ASCII or Modbus/RTU serial interface as illustrated.