User guide

<6. OPC DA 2.0 Interface>
6-1
IM 11B06E01-01E
6. OPC DA 2.0 Interface
ThischapterexplainstheOPCDA2.0interfaceofASGWandASIU.
Adding an OPC server of STARDOM to the system allows ASGW/ASIU to have the OPC in-
terface. There is no need to add any special settings to the ASGW/ASIU application. Map-
ping Modbus data of ASIU to ASGW allows ASIU data to be read and written by accessing
ASGW through the OPC interface.
6.1 SystemConguration
GC8000
ASIU
ASGW
Ethernet
OPC Server PC
GC1000 MarkII
F0601.ai
6.2 Software Required
ASGWdonotrequireadditionalsoftwaretobeinstalledforOPC.TheSTARDOMsoftwarelisted
belowisrequiredforaPConwhichanOPCserveristobeinstalled.
Model Item Remark
NT781AJ FCN/FCJOPCServerforWindows
NT783AJ Redundant Network Function License
forFCN/FCJOPCServer
Requiredonlyforredundantnetwork.
6.3 Installation and Settings
ForinstallationandsettingsoftheOPCserverandtheduplexedpackage,refertotheirrespec-
tive user’s manuals or online help.
6.4 Update rate
DatafortheOPCinterfaceisupdatedeverysecond.Therefore,adelayofaboutonesecond
mayoccurwhentheOPCclientreadsthelatestdatafromanalyzers.
TIP
SeparatingOPCdatafromModbusdatacauseshoggingoftheCPU.Toavoidthis,theOPCdataupdaterateis
set to 1 second while the Modbus communication is updated every 200 ms.
4th Edition : Nov. 22, 2011-00