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Found 5 results

  1. opc

    Hi, I have two Jazz JZ20-J-T40 PLC-s, and one V130-J-TR20 PLC. I am using zView SCADA. I tried to connect them via Ethernet by using switch, but I cannot use two different PLCs on this SCADA. Then i tried to connect them to SCADA via uniOPC, but communicating is just too slow. I have just one bit that goes from 0 to 1 in 0.5 seconds, and back to 0 in 0.5 (1 second pulse), just for testing, still it's too slow. It runs normally for like 2,5 seconds, and then just stops, and changes in 4-10 seconds, or just freezes for 2-3 minutes, and then changes. My PC Spec are not in the way of this, I am sure of that, i have tried it on my weakest and strongest laptop, still exactly the same results, too slow with just one bit for each of the PLCs, that is 3 bits total. Does anyone had the same problem, is there a way of fixing this? Regards Nikola Ljubinkovic
  2. Hello Is it possible to read one PLC (V130 in my case) with more than one UniOPC server software which are running in different computers? I have an application where V130 is read from one PC by UniOPC server and I need read same PLC with other UniOPC server located in other PC. All tags are identical. I installed UniOPC program to both PC and they both can read the PLC but not simultaneously. I can connect both UniOPC with PLC, but only firstly connected OPC can read tag values. Secondly connected OPC tags quality is //Uncertain, non-specific// and tag values are zeros. Both UniOPC sever have identical configuration. Is it in principle not possible to read one PLC with two UniOPC or I have problems with settings? Regards, Meelis
  3. Hello, When reading timer value as numeric data type (TCL or TPL) the result is always 0, while reading it as a string returns correct value. I don't know what's the problem. It probably isn't syntax because OPC reports syntax errors, I tried all numeric data types and the result is always 0. Reading value as a string isn't that much of a problem because substrings for minutes and seconds can be extracted. But when writing the value into PLC some code gymnastics is required which takes time. So my question is can timer values be treated as numeric variables? I use "WinLog" SCADA from Sielco, example of tags that I use: Transport.TPL0 (this returns 0) Transport.TP0 (this returns correct value)
  4. In 02/Dec I've finished a graduate course at SENAI and my term paper was about how build a simple Java application and get a Vison 350 PLC communicating with a Linux server without using OPC and a step by step jig construction. In fact I did two Java applications 1- TCP_Server which a Linux server timely receives data sent from V350 PLC 2- TCP_Client which implements the Unitronics ASCII communication protocol allowing an user read and write any PLC registers of Vision V350 model May be that code could work for other Vision models. That Java code is available for download "as is" and hope it helps everybody to get their PLCs communicating. Find below my website link English version http://nets-nuts.com...cs-with-linux/ http://nets-nuts.com...lc-testing-jig/ Brazilian Portuguese version http://nets-nuts.com...nics-com-linux/ http://nets-nuts.com...-giga-de-teste/ Java code can be downloaded at SourceForge website : http://sourceforge.net/projects/plc-unitronics/
  5. hello, I.m a newbee and I'm developing a scada application, and I want to connect with multiple plc's using UniOPC Server. Scada is developed in C# .net and I'm using for opc client: OPC .NET API 2.00 Redistributables. For connecting to uniopc server, i need the name and location for the server: Thanks in advance.