Modbus Serial OPC Server


Modbus Serial (ACII/RTU) OPC Server 320 was developed by OPCTechs Technology Corporation in June. 2005. According to the standard OPC 3.0 Specification, we developed the packaged software for our extended customers especially in the automation fields. It is suitable in the integration fields in every walk of life. Modbus protocol is one of the most popular communication protocol in the world today. As the new devices create, the modbus protocol should be embedded by the device makers. Modbus protocol let the engineers fast and easily to integrate devices to the automation software. The devices such as power meter, water leakage machine, generator, UPS … etc. They all inborn provide the Modbus communication protocol.

Serial Communication Protocol

◎ Modbus proprietary protocol

Case Study

◎ Case Study1 : Case for Integrating Power Meters

Supported Devices

Model Name CPU Serial
PM500 PM500
PM700 PM710
PM800 PM810
CM3000 CM3250
CM4000 CM4250


Key features of the OPC Server 320 include:

◎ Tag values are persistent.

◎ Tags have configurable alarm conditions.

◎ Flexible configuration for numerous tags.

◎ Tags support configurable range information.

◎ Value simulation for any data item in the OPC server.

◎ Tags can be grouped in logical folders for manageability.

◎ Tag multiplier allows you to create hundreds of tags in seconds.

◎ OPC Data Access Server、Alarm & Event Server are integrated in one program.

◎ Compliant with the latest OPC XML Data Access 1.0 standard.

◎ Compliant with the latest OPC Alarm and Events 1.0 and 1.2 standards.

◎ Compliant with the latest OPC Data Access 1.0, 2.04, 2.05 and 3.0 standards.

Required Hardware & Software Item Specification
IBM Compatible Computer CPU Intel® Pentium® 4or higher
Memory 2 GB RAM at least
HDD space 10 GB disk space
Operating System Windows 7 Professional 32/64-bit
Windows 8 Professional 32/64-bit
Windows 10 Professional 32/64-bit
Windows 2003 Server 32/64-bit With Service Pack 1
Windows 2008 Server 32/64-bit With Service Pack 1
Windows 2012 Server 32/64-bit With Service Pack 1
Windows 2016 server 32/64-bit

Windows CE

Required Hardware & Software Item Specification
Windows CE CPU ARM, XScale, X86 CPU
Operating System Windows CE Windows CE 5.0, 6.0

OPC Compliance

Compliance Testing is a process which verifies that an OPC product implements a specification properly by using a standard software test tool developed by the OPC Foundation. This test tool, called the Compliance Test Tool or CTT, is currently available for several specifications. Vendors can download the CTT from the OPC Foundation website and run the tests at their site. The company’s administrator or designated product manager for the OPC Foundation WEB site can then attach the encrypted file generated by the CTT to the appropriate OPC Foundation Product catalog item. The OPC Foundation Product Catalog will display the results to the public. OPC Users should look for OPC Server products that have passed the compliance tests for all specifications that the product supports and display the “Self Tested” logo.Compliance Testing is only available for OPC Server products.

Certification Testing

Link Name Version Compliance Tool Date Tested Test Result
OPCTechs.Modbus30DA 3.20.0 DA 2.05a ( 2007-07-24 Tested
OPCTechs.Modbus30DA 3.20.0 DA 3.00 ( 2007-07-24 Tested

Integration Different Kinds of PLC

Project Introduction:

Generally, MIS department exists in well-established company to collect instrument operating data to analyze the data and give report, also, of course to write PC program. Data collection is always an annoying trouble for most MIS engineers because all the programs are designed with different programming languages. Now, with the help of OPC Server, all the problems mentioned above can be solved easily rising the efficiency. OPCTechs Technology Corp. provides OPC Server for most popular PLC. Programs written by different programming languages could also communicate through Data Exchange OPC Server.

System Requirement:

  • VB programming language

  • VB.NET programming language

  • OPCTechs Panasonic Serial OPC Server

  • OPCTechs DataExchange OPC Server

  • OPCTechs Yokogawa Serial OPC Server
  • OPCTechs Yokogawa Ethernet OPC Server

  • OPCTechs Koyo Serial OPC Server

  • OPCTechs Fuji Serial OPC Server

  • N-Port

  • System Diagram:


    OPCTechs OPC Server support part of popular devices, such as all series of Melsec PLC, Omron PLC and AB PLC. Moreover, we also provide well organized structure of OPC Server and Client, so all the monitoring program and self-developed program could be integrated with each other easily. Time for developing Driver program could be saved.