Mspeck

MrPLC Member
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About Mspeck

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  1. Knowing length of time PLC was powered down

    Well, after explaining this issue to the Mechanical Engineer he stated, " Why not just use a 'centralized' plc that handles all the data and have it send the information to Ignition " This PLC could be mounted in my server rack and would never require being shutdown without being a planned shutdown Ughh, I hate it when he has a good viable option,  This is a good solution and will probably be the way I will proceed. I will keep this post active until Monday, 1/11/2021,  in case anyone has additional comments, Thank You all for your support, Mike
  2. Knowing length of time PLC was powered down

    Thank You Joe E. and panic mode, your replies provide good information as to writing logic monitoring the GSV, this will be a challenge and not looking forward to it.!!
  3. Good afternoon,    I'm currently collecting runtime data from my production floor PLC's,  Example: Footage produced per shift, Uptime, Downtime, etc. At the end of each shift the plc triggers a bit that goes high where Ignition, the data handler software, collects the data and stores it in an SQL database table. Ignition then writes back to the PLC and all data is then reset to zero to begin collecting the data again for the next shift. The issue I am experiencing, When the Machine is powered down for preventive maintenance so is the PLC, this causes two issues... •    When the machine is powered down after running for a period of time the Downtime data will not be accurate once power is returned. I may be able to write some logic that monitors the system clock on the first scan and compares to the total time in the Uptime and Downtime counters and if there is a discrepancy then add that time to the Downtime counter. But this will be quite some logic to develop !! But can be done. •    2nd scenario, When the machine is shutdown and not turned back on until the following shift the uptime / downtime and footage data has not been reset because it missed sending the trigger to Ignition,  now we continue to add data to these tags and add it to the following shift. I'm sure someone out there has experienced this and hopefully can help, Some have mentioned to keep the PLC powered on when the machine is powered down. I do not much like this option due to safety reasons. Thank You in advance for your support and comments, Mike  
  4. Scaling Anolog Output 1769-OF4CI/A

    Yep, I remember now, thank you gclshortt for your support
  5. Good afternoon all,   I have recently returned to programming, have forgotten a lot but slowly returning, I have a small programming question that I am hoping someone will be able to support. I have a project that requires me to send a 4-20ma signal from an Allen Bradley  1769-OF4CI/A module to another manufacturers analog input card.  I am looking for information on how to scale the card, for example how does the card know that a raw value of 10 is equal to 4ma and a raw value of 80 is equal to 20ma This has got to be a very easy question, and I am sure I will kick myself once someone explains, but for some reason I cannot remember how to do this. Thank You in advance
  6.  I created an OPC / DDE Topic within RSLinx Classic. I then added the tag links of the data that I am wanting to print to the Excel Spreadsheet, I then wrote some script within Excel that if a certain cell equals 1 then Print the spreadsheet. Once the spreadsheet prints clear data, repopulate  with new data from the PLC and wait again for the cell to generate a 1. It works very well,  Thank You again for your help,
  7. Thank You again collinsd70, As mentioned I am now in the beginning stages of this project, the printer mentioned does not need to be the printer I use, it just happens to be on the plant floor. I have some capital to purchase needed equipment, software etc. You mentioned exporting data utilizing an OPC Server, Years ago I had a very similar project where I had purchased OPCWare for Excel, however this software is no longer compatible with Microsoft Excel 2010 and possibly not with a CompactLogix processor. (I quit reviewing when I seen it wasn't compatible with Office 2010.) Is there 'other' software available that you would recommend or have used in the past. Or maybe the question would be, how would you go about using an OPC Server as suggested ?
  8. Thank You collinsd70 for responding, My printer is an HP Laserjet P2035n  with ethernet IP
  9. Good afternoon all,   I've been tasked to print out production run data to a network printer at the end of the machine cycle. My PLC is a 1769-L33ERM CompactLogix. Any easy way of doing this, along with some sample logic would also be greatly appreciated.
  10. Concat Ascii to readable text

    Thank You Ken, this worked perfectly. I appreciate you and 'panic mode's' response to my post.  
  11. Concat Ascii to readable text

    I have been trying this for two days and am getting nowhere, My string array looks like this . . .  BCData.Data[0]  currently equals 5 When Copied to a string that string value equals '6828$r$00$00$00$00$00$00$00$00 Why is it not simply copying the 5 that is located in that element
  12. Good morning, I have an ASCII tag BCData.Data[0] thru [8] Data Type SINT. How can I combine all values into a readable text ? This is a Compactlogix processor.
  13. There's more I need to accomplish than just logging and alarming. I'm going to see if I can access the 'Master' PLC and see how it is reading data from the 3 boilers.  If I need to upgrade to a Compact Logics I will if required.   Thank You for your support Joe, I will post my findings
  14. Thanks Joe for getting back with me, If I use a RedLion, I could send tags to it from the 'Master' But how then could my 5/05 read those tags from the RedLion. Or am I misunderstanding what you are stating ? I use RedLion here at my facility for generating OEE screens on my plant floor, So those are accessible to me and have some understanding of there operation
  15.      Good morning, My company recently purchased 3 new boilers, each boiler has a 1769-L33ER processor. There is also a 'Master' PLC that reads data from each of those boilers. Being that these machines are boilers I am unable to modify the logic due to safety and liability concerns of the manufacturer. Yes, we can gain access to be able to change the logic but then we are responsible for any errors or issues that may arise.  My question is, I would like to add another PLC so that I can read tags from all of the boilers, Another 'Master' if you will. This would allow me to write logic for alarming and data collection without actually touching the proprietary programs. I currently have an  old SLC 5/05 which I would like to use, but also could upgrade if there is no way of performing this task. Communication would be over ethernet. Can this be accomplished easily, Like an HMI reading tags