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Ian Shaw

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Ian Shaw


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Posted By Ian Shaw Jul 01, 2022 04:53:32 AM
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Hi Josh, I've looked at the code and I can't see an obvious error. You will have to be quite precise in describing your problem, remembering that we don't have knowledge of your application. Using addresses will aid clarity. You originally described a problem with Pump 2, but you now mention it applies ...
Posted By Ian Shaw Jun 30, 2022 04:31:18 AM
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If I understand you correctly, you are seeing both I:0/5 and I:0/8 (Pump 1 Run & Pump 2 Run) come on, but you are expecting only Pump 2 to run. First question: is Pump 1 actually running in addition to pump 2? Or is it a wiring fault? Force ON & OFF each digital output to check the wiring is doing ...
Posted By Ian Shaw Jun 21, 2022 03:35:34 AM
Found In Egroup: Automation Control
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I can't give you a definitive answer. My intuition is that if you download an application, then it will overwrite any users added during runtime with whatever configuration was in the FTVME security settings. I suspect that the way round this would be to upload the runtime file from the PV+ and import ...
Posted By Ian Shaw Jun 14, 2022 04:02:16 AM
Found In Egroup: Automation Control
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You need an array to hold the serial numbers from the last hour. I'm not sure how you've stored the numbers, so I'll assume you've used a DINT. You write that you produce 4 - 6 parts per hour, so an array of DINT[6] should suffice, but you might want to include some margin for error. You can use the ...
Posted By Ian Shaw Jun 09, 2022 03:41:59 AM
Found In Egroup: Advanced Software
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Thanks for the clarification regarding the Class 1 and Class 3 operation. So, if there is a 3rd party module out there, it would have to be one that supports class 3 communications. To buy a conversion module that costs about the same as a controller doesn't make much sense for my application; I ...
Posted By Ian Shaw Jun 08, 2022 12:11:32 PM
Found In Egroup: Advanced Software
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Is there some I/O that FactoryTalk View SE can read without a PLC? I only need to monitor 2 Digital Inputs at a certain location, and there is no control required. It seems a bit excessive to put in even a small controller (like the 1769-L16ER) to do the job. Ethernet/IP would be best, since I wouldn't ...
Posted By Ian Shaw May 03, 2022 04:08:00 AM
Found In Egroup: Automation Control
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Hi Gregory, In brief, Disable means, "this shouldn't be an alarm" whilst Suppress means, "don't bother me with this alarm right now". Disable alarm stops the alarm from being raised. The .InAlarm bit is not set. Suppress alarm stops the alarm from appearing on the banner and FT Alarm Summary. ...
Posted By Ian Shaw Apr 27, 2022 06:58:00 AM
Found In Egroup: Automation Control
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Hi David, Thanks for the update. I'd have thought it would be easier to fix the problem by simply copying the internal timer accumulator to the MinDurationAcc. This seems like less work than updating the documentation and reformatting how the instruction appears. It's rather disappointing to ...
Posted By Ian Shaw Apr 27, 2022 06:25:00 AM
Found In Egroup: Automation Control
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Have you tried varying the Min Duration depending on which alarm conditions are active? For example, if the Hi alarm is set, then it should be ok to change the Duration to the time you want for HiHi. Does this mess up the Acknowledge request? It gets slightly trickier if there is no alarm, and you ...
Posted By Ian Shaw Mar 14, 2022 04:57:00 AM
Found In Egroup: Automation Control
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The product web page is lacking in detail, isn't it? And when you click through to the documentation links it isn't very obvious which ones you need. The power supply and Ethernet ports are integrated. There are 16 DI and 16 DO included. Ordering before checking specs will give you an interesting ...
Posted By Ian Shaw Mar 11, 2022 03:57:00 AM
Found In Egroup: Automation Control
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I assume that you have pressed the Clear Majors and put the processor back into run mode, and the fault occurs again. Have you checked that the little white tabs at the top of the modules are all locked into place. I see that you have ticked "major fault on controller if connection fails while ...
Posted By Ian Shaw Mar 07, 2022 05:32:00 AM
Found In Egroup: Automation Control
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There's no fix available, so we're stuck with the bug until Rockwell development get round to fixing it. But since the bug has persisted from version 27 to 33, it doesn't seem like they care to. My work-around is to run a TON on parallel with the ALMD instruction, with an XOR of the In and Condition ...
Posted By Ian Shaw Mar 02, 2022 03:48:00 AM
Found In Egroup: Automation Control
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There are add-on instructions available that can do this, so long as your processor/comms card is modern enough to support sockets. As PJWZA mentioned, there are third party solutions from the likes of ProSoft and HMS Anybus that take away a lot of the pain. ------------------------------ Ian ...
Posted By Ian Shaw Feb 17, 2022 04:26:00 AM
Found In Egroup: Legacy
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There are several things you need to understand. How to send Modbus read and write requests from the ML1400. The video should help with that. The Modbus data register layout of the ABB device you want to talk to. You need to get this from the ABB documentation. The different Function ...
Posted By Ian Shaw Feb 16, 2022 10:36:00 AM
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You haven't given us any detail on what you are having trouble with. Maybe this video will help, though. https://youtu.be/uXCmZYeHER0 ------------------------------ Ian Shaw ------------------------------
Posted By Ian Shaw Feb 16, 2022 10:30:00 AM
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Do I understand you correctly? On your rung 2, the timer resets to zero and the T4:8 restarts, but C5:20.ACC stays at 0 and never counts from 1 to 10. I haven't got a processor to test this, but here is what I think might be going wrong. It's possible that the T4:8/DN is not set long enough for the ...
Posted By Ian Shaw Feb 16, 2022 05:47:00 AM
Found In Egroup: Automation Control
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Hi Mark, Yes, that's the best solution, I think. I was hoping for an in-rack solution since it would affect my drawings less. I'll have to either use the slot-filler 1769-ARM or move the last I/O module to Slot 1. Thanks. ------------------------------ Ian Shaw ---------------------- ...
Posted By Ian Shaw Feb 16, 2022 05:42:00 AM
Found In Egroup: Advanced Software
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I often say that job of the IT department id to stop people using computers! It does sometimes seem we lose more time trying to overcome the security restrictions than the time we lose to malicious actors! ------------------------------ Ian Shaw ------------------------------
Posted By Ian Shaw Feb 16, 2022 05:38:00 AM
Found In Egroup: Legacy
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Please explain what you mean by "When I parallel output with reset timer, the counter is not counting". What problem do you see? I think you can code this a bit more efficiently. Use a 1-minute timer, and use the DN bit to increment both the LCD timer and the C5:20 timer. The C5:20 counter isn't needed ...
Posted By Ian Shaw Feb 15, 2022 06:45:00 AM
Found In Egroup: Automation Control
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I would normally use a ProSoft MVI69E-MBS module for Modbus RTU communications. However, due to supply chain issues, I can't get hold of one in time. I've also used the Rockwell Sample code accompanying Using Logix5000 Controllers as Masters or Slaves on Modbus (Publication CIG-AP129A-EN-P) for Modbus ...