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Found 8 results

  1. OPC Communication Slow

    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. Hi, I'm using Unitronics PLC JZ20-J-T40, and ZView SCADA. I have successfully downloaded my program into PLC, and tested communication via usb (Serial), and via Ethernet (MJ20-ET1). It's all working properly. Problem begins when i try to connect my PLC to scada PC. With USB everything is working normally, but it's not an option for me to work with usb connection. I want to work with Ethernet communication between PLC and SCADA. What should i do to make it work? Regards Nikola Ljubinkovic
  3. I'm developing SCADA graphics, and was just supplied with an address list from the PLC programmer. After looking over manuals/webinars/forum posts I'm looking to get some verification on whether I got the Modbus addressing correct or not. This is my first experience having to interface with an Unitronics PLC... I'm used to AB or SCADAPacks mostly...
  4. Hi. Try to read values from v570 on modbus tcp from omron cx supervisor scada. When i view port on plc it show that it is connected but dont get any values in the omron scada. Any help from some one that used omron scada with unitronics. Thanks.
  5. Hi all, I am looking for the input/output modbus address range of the expansion module "io ai 4 ao 2" for the V430. How do I go about finding these digits? Thanks in advance. D
  6. Monitoring UniOPC Tags

    Hi to all, Is there a way to monitor the tag values in UniOPC? I can communicate the v350 to its visilogic simulator and view all the tag values, but I need to know if the UniOPC sees the value and pass it to the SCADA connected. My problem is that the SCADA(iconics) always show an uncertain quality and a value of zero which is not the real value. Now, I would like to eliminate if my registration in SCADA is wrong or I have a problem in UniOPC(does not submit the value to SCADA). Whenever the SCADA run, it successfully add the tags I registered, but in SCADA software, I cant obtain the PLC value. Any idea of this problem, I also use OPC Quick client to test the V351 tag value but the Tag quality status is Bad, and the values are all 0. Any help would be greatly appreciated. Hoping someone could help me on this.
  7. Hi all, I have a question regarding slave adressing on Modbus. We have a V130 which we want to use as a slave on a Scada system. When I read about slave adressing in the help file the pointer value offset is given for each data type, no problems. However, when I read the examples (and also different topics regarding modbus here on the forum) another offset seem to occur. For example when writing a 3-bit vector of outputs starting at O8: "SCADA as the Modbus master to color PLC: Convert the HEX address to DEC. In the SCADA application, set the Slave: Start of Vector parameter to 46393 (30001 + 16384(4000h) + 8) and the Force: Vector Length parameter to 3, enabling the Master device to write to O 8 - O 10 within the slave Vision controller." Where does the 30001 come from? The 4000h is obvious since it's mentioned in the help file. A similar offset of 40001 seem to appear when reading/writing MI:s, 400001 for MF:s and so on. I must be missing something fundamental since I can't find any information about this offset. A couple of words around this would be much appreciated. Cheers from Sweden Anton
  8. Good day to everyone! Got an issue trying connect to v1040-t20b via modbus serial. I'm initiating data exchange through usb port (and starting to realize that, eventually, there is no any response from Uni, 'cause com1 supports only PCOM). Than i looked through info mode menu: com1 - pcom, com2 - pcom, com3 - modbus. And at the side panel there are port1 and port2 only. So, there is no such as 'port3' or... com3. How can i configure usb port to recognize modbus commands?
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