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Found 3 results

  1. Greetings all. We have started a minor project at work and we are, admittedly, pretty new to doing any sort of networked communications from PLC to PLC. We have 3x V700 currently and what we hope to accomplish is simply to have (perfect world) a full rendering of the remote HMIs on each of the PLC. Therefore, PLC A would have a link to go to PLC B's HMI and another link to go PLC C's and be able to see the HMI as if standing at that PLC - akin to the iOS remote operator app or using the Windows remote operator software. The question in the end is has this already been easily implemented in some way? Otherwise I assume we would have to use TCP/Modbus or UDP_Raw to pull in valves from PLC B and PLC C but have the HMI of the remote PLC be copied into PLC A's project files. Doing so would make it tedious to keep up with changes to the other PLCs to back implement in the PLC A's code so that the HMI would look correct and all the variables continue to match. If anyone has tried to do a complete remote HMI mirroring / remote op from a secondary PLC, please advise on any tips that might point us in the least painful direction. Cheers!
  2. I have three V430-J-RH6 PLC's, they will be communicating via RS-485. Each of these plc's are running two pumps for that specific unit. My end game is to make sure that none of the units have pumps running at the same time so we don't have power issues, ex. Unit 1 is running a pump so unit 2 and unit 3 cannot run their pumps until unit 1 is finished etc. I know how to program that part in but my struggle at the moment is with how to best get that information to each PLC. I need each PLC to have constant feedback of information from each other PLC. I need each unit to know when the other units are on and off. Is a struct command the best way to do this? If not what is, and how do I implement it? I have looked into the help files on Modbus master and slave for sharing information (read holding registers, and preset holding registers) but it doesn't look like they can share MB's between plc's? I also don't quite understand how those work. Any help in this would be greatly appreciated!! Thank you! Unit 1 Governor Pump_7.31.18.vlp Unit 2 Governor Pump_7.31.18.vlp Unit 3 Governor Pump_7.31.18.vlp
  3. What is the best way to uniquely identify a UniStream® 15.6" PLC with software? Several PLCs are connected to a network with Ethernet cables and they are monitored/controlled by another equipment. I would need to be able to uniquely identify every connected PLCs to make sure, for example, that a PLC connected to given IP address is the expected one. I have read on ASCII String to MI? that the best way to do that was to retrieve the CPU MAC address. Is it still the best way today?
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