OPC DA


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OPC DA

(Open Platform Communications Data Access) See OPC.
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La comunicacion con la red de gestion empresarial por parte del SCI se realiza a traves de un servidor de datos OPC DA instalado en la estacion de ingenieria.
OPC DA le permite a un atacante no solo ganar acceso a datos de control del proceso, sino tambien modificar parametros de ajustes en los controladores, valores de alarmas u otros parametros de control.
#include "orbsvcs/TimeBase.idl" module MCPI_DDS { #pragma DCPS_DATA_TYPE "MCPI_DDS::ItemTopic" #pragma DCPS_DATA_KEY "MCPI_DDS::ItemTopic ticker" enum ItemTip { NUMERIC, LOGIC, TEXT}; struct ItemTopic { string ticker; double valueN; boolean valueL; string valueS; TimeBase::TimeT timestamp; short Quality; ItemTip Type; }; It should be noted that the interface is simpler than in the case of the OPC DA, OPC.NET, OPC UA specifications, or in the case of DAIS (Data Acquisition from Industrial System) standard for CORBA [39].
At the present moment, controls are developed for the following middleware systems or technologies: OPC DA, OPC UA, OPC.NET, TAO (The ACE Orb) and OpenDDS.
All these data were read using the following technologies: OPC UA with TCP as transport protocol, OPC.NET with TCP as transport protocol, OPC DA, the ACE ORB (TAO version 6.2.5) and OpenDDS with TCP as transport protocol.
7 that the bandwidth, limited to a local network, is very close to the OPC DA (very common in SCADA systems).
The OPC DA Client and OPC UA Client drivers have been combined to form the TOP Server OPC Client Suite, providing customers one solution for delivering other OPC Server data to client applications using TOP Server native interfaces such as Wonderware SuiteLink.
Additional improvements in TOP Server Version 5.3 include: added support for S7-1200 PLCs in Siemens Suite; added support for RSLogix version 18 and flexibility enhancements to the DF1 and DH Plus drivers in Allen-Bradley Suite; as well as expanded functionality and improvements made to the Custom Interface Driver, GE Fanuc Suite, Mitsubishi Suite, Bacnet, Beckhoff, Omron Suite, ODBC, SNMP+Ping Suite, OPC DA Client, OPC UA Client, Torque Tool, UCON and Yaskawa drivers.
Acromag, a designer and manufacturer of industrial I/O solutions, yesterday announced the release of a low cost Modbus/TCP Master OPC DA Server which can be used by engineers to rapidly integrate their Ethernet modules into a control system communicating over Ethernet.