Micromod MOD: 30MLTraining Manual - Manual (Page 135)

8 Extended MODBUS OPC Server
8.1 Foreword
The Extended MODBUS OPC Server is an OPC compliant Server able to communicate
with Extended MODBUS devices (MODCELL / MOD 30ML) and serve data to OPC
clients. This MODBUS OPC server was implemented using advanced programming
concepts of OPC specifications.

This OPC Server also supports generic MODBUS protocol and can be used to connect
ABB Commander series instruments and other instruments that support MODBUS
RTU protocol.
The Extended MODBUS Server is installed in the same manner as the ViZapp Software.
Refer to the ViZapp installation lab for details.
8.2 Objectives
In this lab, we will install the Extended MODBUS OPC Server, configure a server
database and add a device to it. We will use this database to download the PIDLAB
Strategy from the previous lab to the MOD 30ML instrument.
We will also populate the OPC database with tags using the MODBUS Interface File
(.MIF) created in the previous lab and monitor the data by reading them from the
instrument using the built-in OPC Client of the Extended MODBUS OPC Server.
After completing this lab you should be able to:
• Configure a Extended MODBUS OPC database
• Download the Instrument document (strategy)
• View the signals using the built-in OPC Client
8.2.1 OPC Tag Database
The database is typically made up of the following:
Devices: These are hardware devices (MODCELL / MOD 30ML) connected to the OPC
Server.
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