kurtv Posted February 16, 2011 Report Share Posted February 16, 2011 Hi I use a application with citect scada. Can i use opc server for communication? What do i need to do in the ladder program? It is the first time that i use How can i read for example an MB, MI, Input or Output ? I is the first time that i want to use it In citect you have bcd, Byte, Digital ? But how can i read it? Can any one help me to start? Thanks Regards Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted February 17, 2011 MVP 2022 Report Share Posted February 17, 2011 It would probably be easiest to use Citect's Modbus or ModbusIP driver. Set up the Unitronics unit as a Modbus slave and you can read everything easily - see the Help on Modbus for examples. Joe T. Quote Link to comment Share on other sites More sharing options...
Ofir Posted February 17, 2011 Report Share Posted February 17, 2011 Hi, Which communication are you using? (Serial, Ethernet..) I'm not familiar with Citect SCADA but if you wish to use UniOPC server then if you are using serial connection, you need to set the PLC com port for connection with UniOPC. If you are using Ethernet then you need to set IP settings and PLC name to the PLC using TCP/IP card Init and PLC name functions (Under com menu). Then in UniOPC you need to create the channel with the right communication settings and add a PLC. (See UniOPC help) Later the syntax in the SCADA for configuring tags will be :<PLCName> <ItemPrefix> <Address>. For example if the PLC name is "kurtv" and you wish to read MI100 then the syntax will be kurtv.MI100 Quote Link to comment Share on other sites More sharing options...
kurtv Posted February 19, 2011 Author Report Share Posted February 19, 2011 Thanks for the reply . I try it . Quote Link to comment Share on other sites More sharing options...
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