CENTUM OPC Server (Exaopc)

OPC is an open interface standard for accessing process and factory automation data. OPC provides a seamless interface for exchanging data between a process control system (PCS) and a manufacturing execution system (MES).


Functions of Exaopc

Integration of CENTUM and MES data

Yokogawa's Exaopc interface package is compliant with the OPC standards. Exaopc works in association with a variety of OPC client applications such as the Exaquantum plant information management system (PIMS), the Exapilot operation efficiency improvement package, and general-purpose OPC-compliant applications. By interfacing with Yokogawa's CENTUM VP,CENTUM CS 3000, and CENTUM CS production control systems, Exaopc provides additional functions for enhanced productivity.


Exaopc system image

Main features

  1. Exaopc interfaces with Yokogawa's CENTUM VP, CENTUM CS 3000, and CENTUM CS production control systems (PCS).
  2. Exaopc consists of a common user interface layer and an I/O cassette layer. The I/O cassette layer supports a wide range of PCS interfaces, thus minimizing the number of changes that need to be made to PCS programs and reducing maintenance cost.
  3. Exaopc complies with OPC specifications such as DA, AE, HDA, security, and batch. It is DA3 certified as well.
  4. Exaopc has strengthened IT security functions.

Original Yokogawa functions

  1. Automatic saving and storage of process data acquired by the DA server in a historical database (HDA). Access to stored data is enabled by an HDA server function
  2. Equalization of CENTUM tag lists by Exaopc, enabling online updates of function block information
  3. Connection with CENTUM systems via VI702/VF702 cards and V net communication.
  4. Detailed security settings for clients
  5. Control of data access volume to prevent excessive loads on CENTUM field control stations (FCSs)
  6. Virtual test functions for engineering and testing of OPC clients (does not require the use of an actual FCS)
  7. Multiple project connection function for handling of CENTUM project data on Exaopc
  8. Various viewer tools and functions for monitoring of Exaopc operation status
  9. Enhanced IT security functions that allow users to select the optimum security level

Exaopc Release Information

Overview of the latest Release Information

R3.78 (July, 2019)

Archive of Release Information

R3.77 (July, 2018)  
  • Support of CENTUM VP R6.06
  • Support of the latest operating systems
  • Yokogawa Virtualization platform support
R3.76 (June, 2017)  

CENTUM VP R6.04 support added

R3.75 (June, 2016)  

CENTUM VP R6.03 support added

R3.74 (November, 2015)

CENTUM VP R6.02 and ProSafe-RS R4.01 support added

R3.73 (March, 2015)  

CENTUM VP R5.04 and R6.02 support added

R3.72 (April, 2014)  

CENTUM VP R5.03 support added

R3.71 (December, 2012)  

CENTUM VP R5.02 support added

R3.70 (August, 2011)
  • CENTUM VP R5.01 and ProSafe-RS R3.01 support added
  • New software environments added
    Windows Server 2008 R2 Standard Edition SP1 (64-bit)
    Windows 7 Professional Edition SP1 (64-bit) supports added
  • Security functions enhanced
    User authentication enhancement for accessing CENTUM VP data
R3.60 (April, 2010)
  • CENTUM VP R4.02 support added
  • Windows Server 2008 with SP2 and Windows Vista with SP2 support added
  • Enhanced security levels (Legacy, standard, and strengthened types) added
R3.50.10 (July, 2008)
  • CENTUM VP 4.01 support added
  • OPC compliance test certificates ("self-tested"): DA 2.05a, DA 3.0, A&E 1.10, and HDA 1.20 obtained
  • Microsoft Windows Vista Business Edition SP1 support added
R3.21 (March, 2007)
  • CENTUM CS 3000 R3.08 support added
  • Exaopc security setting function added
  • OPC server redundancy function (Exaopc-RD) improved
  • Windows Server 2003 R2 support added
R3.20 (March, 2006)
  • CENTUM CS 3000 R3.07 support added
  • OPC server redundancy function (Exaopc-RD) improved
  • Support tool and log files for investigation of OPC connections enhanced
R3.11 (June, 2005)
  • CENTUM CS 3000 R3.06 support added
  • ProSafe-RS support added
R3.10 (December, 2004)
  • Windows Server 2003 support added
R3.01.50 (August, 2003)
  • Exaopc-RD support of redundant OPC server added
  • New batch server functions for Exaopc/Batch added (complements existing DA, A&E, and HDA server functions)
R3.01 (April, 2003)
  • Windows XP support added
  • Compliance with OPC Foundation's OPC specifications obtained
R2.10 (August, 2002)
  • Compliance with OPC Foundation's OPC specifications obtained
R2.01 (June, 2001)
  • Windows 2000 Server support added
R1.20 (October, 2000)
  • Project connection (with CENTUM CS 3000) support added
  • Tag with plant name (with CENTUM CS) support added
R1.10 (February, 2000)
  • Expanded test functions for CENTUM CS 1000/3000 support added
  • Windows NT support added


  • Implementation of AOA package for improved grade-change operation
  • Dramatically reduced operators' workload and transient products, as well as sharable operation know-how


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