shane.platt Posted December 23, 2020 Report Share Posted December 23, 2020 I am a control engineer and was brought in on an existing project consisting of a Omron vision system and a Unitronics USP-070-B10. I was tasked with adding additional measurement tools to the vision system. The vision system is utilizing an 10 indices array(float) nested inside a STRUCT. I am planning to add 50 more measurements to the vision system. I thought it would be easier to just increase the size of the existing array to accommodate the new measurements. After increasing the size of the existing array I compiled the project and oddly enough I had about 40 mismatches between the PC and the PLC including communication mismatches that were not there prior to the increase. I went ahead an downloaded the file to the plc. After the download was complete I could no longer connect to the vision system, nor could I connect to the collaborative robot that the Omron camera was mounted on. I generally only work with Beckhoff, Allen Bradley, or Siemens PLCs, so I am not very familiar with Unitronics. I know in the past 30 years of programming I have modified the index size of arrays on countless systems, and never had an issue. Has anyone ran across a similar issue when increasing the number of indices in an existing array?? I modified nothing else in the programming except for the number of indices in one array and literally nothing works. Does this have something to do with the way the PLC is allocating the memory? I have never seen a option in any other PLC to "Reallocate Memory". The documentation doesn' t mention "Reallocate memory" anywhere, so I have no idea when or why I would need to use that. Can anyone shed some light on that?? Thanks, Shane Quote Link to comment Share on other sites More sharing options...
MVP 2021 Joe Tauser Posted December 23, 2020 MVP 2021 Report Share Posted December 23, 2020 Shane, This is a very specific question and somebody needs to look at your program to diagnose the problem. I recommend contacting Unitronics Official Support at support@unitronics.com. The forum is manned by volunteer users. Joe T. Quote Link to comment Share on other sites More sharing options...
Swervomotor Posted December 28, 2020 Report Share Posted December 28, 2020 On 12/22/2020 at 11:11 PM, shane.platt said: I am a control engineer and was brought in on an existing project consisting of a Omron vision system and a Unitronics USP-070-B10. I was tasked with adding additional measurement tools to the vision system. The vision system is utilizing an 10 indices array(float) nested inside a STRUCT. I am planning to add 50 more measurements to the vision system. I thought it would be easier to just increase the size of the existing array to accommodate the new measurements. After increasing the size of the existing array I compiled the project and oddly enough I had about 40 mismatches between the PC and the PLC including communication mismatches that were not there prior to the increase. I went ahead an downloaded the file to the plc. After the download was complete I could no longer connect to the vision system, nor could I connect to the collaborative robot that the Omron camera was mounted on. I generally only work with Beckhoff, Allen Bradley, or Siemens PLCs, so I am not very familiar with Unitronics. I know in the past 30 years of programming I have modified the index size of arrays on countless systems, and never had an issue. Has anyone ran across a similar issue when increasing the number of indices in an existing array?? I modified nothing else in the programming except for the number of indices in one array and literally nothing works. Does this have something to do with the way the PLC is allocating the memory? I have never seen a option in any other PLC to "Reallocate Memory". The documentation doesn' t mention "Reallocate memory" anywhere, so I have no idea when or why I would need to use that. Can anyone shed some light on that?? Thanks, Shane I agree Support is going to be your best bet but I would start by looking at: How are they communicating? Ethernet/IP, Modbus? When adding vision "measurements" in the vision controller, does the communications struct that was previously running already have place holders for those bytes? Hard to put into words but if you made changes to the communication struct in the plc it would not match the output coming from the vision controller. In the picture attached if the input size changed (by adding components) unless your actual output coming from the Omron also changed size you would have a mismatch and it likely would not work. -Swervomotor Quote Link to comment Share on other sites More sharing options...
shane.platt Posted December 30, 2020 Author Report Share Posted December 30, 2020 Joe, Thank you for the direction! Swervomotor pretty much nailed my problem, the input sizes differ between the Omron vision system and the Unitronics. Nice catch Swervo!! Impressive! Quote Link to comment Share on other sites More sharing options...
Swervomotor Posted January 4, 2021 Report Share Posted January 4, 2021 On 12/30/2020 at 7:52 AM, shane.platt said: Joe, Thank you for the direction! Swervomotor pretty much nailed my problem, the input sizes differ between the Omron vision system and the Unitronics. Nice catch Swervo!! Impressive! Shane, Happy to help, glad you got it worked out. -Swervomotor Quote Link to comment Share on other sites More sharing options...
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