BobLfoot

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Posts posted by BobLfoot

  6. Posted

    So if I understand the circuit in question you have a Hot Wire from a 250 VA Inverter in Cabinet #1, to an SSR normally open contact in cabinet #2, to ten-watt LED in either Cabinet #3 or Cabinet #1 and the the Neutral from the 250 VA Inverter comes to the LED as well.

    You will as I understand the NEC need to fuse the wire leaving the Inverter to protect it at the amp rating of either the wire or the SSR whichever is less.  So an AWG20 conductor if used is rated for 3 amps and you'd need to fuse for that.

    It's not that the inverter can't produce the 10 amps that's the issue, in the event of a malfunction and one of the higher ampacity wires is shorted to your 10 amp ssr you want the fuse to blow before the SSR or the wire fails.

  7. Posted

    3 hours ago, LuisGonzalez said:

    Thank you very much.

     

    My las RPI was 30 and I changed it to 750.

    So my basic reading of the manual @pturmel will correct me. 

    Means your before RPI was actually 16 ms {rule of 2s} and after was 512 ms.

    So before you were sending 62.5 level readings per second over the wifi after your sending 2 level readings per second over the wifi.

    1/30 of the wifi traffic so a much more stable system.

  9. Posted

    The Omron Gurus will probably give you a much simpler definition but Page 43 of the NJ301 Manual - https://assets.omron.eu/downloads/manual/en/w500_nj-series_cpu_unit_hardware_users_manual_en.pdf define the "System Service" as what I would call in laymans terms the "Overhead Processing".  So at 10% you're leaving 90% for Program Scanning and Execution and 10% for Comms and Interrupt handling and etc.  

    I suspect you can change it dropping the number in stages 20 - 15 and finally 10 if you can afford to ahve a line hiccup when the overhead doesn't get processed.

  10. Posted

    16 hours ago, bobbykey said:

    in remote run in rslogix 500 if I toggle my input bit it doesn't give me an output on I'm using 1400 series c.What could be the issue?

    So I am assuming you have RSlogix 500 properly connected to your Micro 1400 Series C PLC.

    Next I am assuming that RSLogix 500 is telling you that you are in remote RUN.

    Step 1 - Verify your Input -- Go to the data table and when you turn the input on you should see a 1 in the data table.

    Note for Step 2 - Know what your output will do if it turns on and be sure that can happen safely before you test the output.

    Step 2 - Verify Your Output - Go to the Output Coil in Logic and Select Force ON followed by Enable Forces.  - You Should see an LED for the Output on the 1400 and Have voltage to the output.  Remove and Disable Force when test is done.

    Step 3 - Make sure the input is programmed to drive the output.

         This means that the Routine the logic is in is part of the active scanned program.

          It also means making sure you don't have multiple coils of the output.

     

    1 person likes this

  13. Posted

    On 2/16/2023 at 1:51 PM, LuisGonzalez said:

    I'm having troubles with a 1734-AENT-C module, I'm new in the company and last week me started to have this communication issue with this module, communication between the module and PLC began to fail and in RSLOGIX apears 16#0203 (Connection timed out), but this code appear and disappears, the connection is stablished for a few seconds and then it returns the same error, I have a little experience in PLC's, I don't know what could be happening, can someone help me with this issue?

    Since the problem started last week.  1-How long was it running before the problem occurred?  2-What changed in the subnet of the module in the last two weeks?

  14. Posted

    Until you can share some design details of your system there are too many variables to suggest a firm solution.

    Most Film Cutting Systems I have worked with fall into one of two types.

    Type A - Film is printed with a Registration Mark which the automation recognizes and the cut should be "X" mm from the registration mark.

    Type B - Film is not printed or printed with ambiguous data and the cut simply every fixed distance {100 mm} as measured by the automation.

    Without knowing this one variable we could propose the wrong answer to you.

    1 person likes this

  18. Posted

    @ashraf  So Conveyor Line A goes past Release Gate A of each silo and over Hopper Drop Gate A of each hopper.

    So Conveyor Line B goes past Release Gate B of each silo and over Hopper Drop Gate B of each hopper.

    For Example Silo 1 is Salt and Hopper 1 is Salt while Silo 3 is Sugar and Hopper 2 is Sugar.

    Hopper 1 hits min so you want to fill it on covneyor A from Silo 1.

    After that is done Hopper 2 is low and you fill it on conveyor A from Silo 3.

    WHile that is filling hopper 1 goes low again so you fill it from SIlo 1 on conveyor B.

    and things continue.

    A Phase Engine or Step Sequence of five will accomplish this nicely.

    1 person likes this

  19. Posted

    @ashraf The confusing thing for most of us is that you're using Five (5) Silos with Two (2) Exit Gates to feed Four (4) Hoppers on Eight (8) Conveyors and most people do math as 5 x 2 = 10 Conveyors.

    Now if you actually have Conveyor A that runs past Exit Gate A on each Silo and has Drop Gates at each hopper.

    And you have Conveyor B that runs past Exit Gate B on each Silo and has Drop Gates at each hopper.

    Now the remaining question is do all Silos hold the same material?

    First I would check all min level sensors and load a FIFO of those needing filled.

    Second I would write my Fill Routine Sequence as follows:

    1. Open Drop Gate of Hopper

    2. Start Conveyor

    3. Open the Silo Exit Gate.

    4. When Max Level Sensor is seen Close Exit Gate

    5. Run Conveyor for clean out time

    6. Stop Conveyor

    7. Close Hopper Drop Gate

    Third I would have a mapping routine that maps the FIFO Item to Real World gates.

    I hope I am explaining this well.

    2 people like this

  20. Posted

    That model number is for a "Display Module, Touch Screen, PanelView Plus 1000, Touch Screen" .

    That generation of Panelview used add on Communications Modules and was quite a pain sometimes.

    I beleive this is the manual you'll want - https://www.rockwellautomation.com/search/ra-en-US;keyword=2711P-RDT10C;startIndex=0;activeTab=Literature;spellingCorrect=true;facets=;languages=en;locales=en_GLOBAL,en-US;sort=bma;isPLS=false;sessionID=e7c407b2-e7eb-694c-10bf-1d0f2161ca5d;deepLinking=undefined

    Your simplest method of backup would be to use Configuration Mode and a USB Stick.

    You'll also want to pay attention to what revision of firmware the Panelview Unit has.

  23. Posted

    On 1/19/2023 at 11:54 AM, John B said:

    Joe, you are a rock star!  Thank you!

     

    My hope was to convert this from Allen Bradley to OMRON, It is pretty daunting. Any thoughts?

    Daunting, but not impossible for most of what I saw scanning Ladder File 2.

    What really concerns me is all the DH485 traffic from Channel 0 to whatever device inhabits Node 0.  I'm hoping it's a Panelview or some HMI.

    That is going to be your biggest hurdle, I've never seen Omron do Rockwell's proprietary DH485.  You're going to need something like a Redlion Data Station to covnert the protocols.

  25. Posted

    The Micro 1100 is a nice compact PLC, but it does not have the features of a PAC like Ramp and Motion Commands which could do what you're wanting much more elegantly.

    Before you blindly add more steps, i'd ask myself the following questions:

    Is your "Specified Period of Time" a constant or does it need to be variable?

    How does 1/100 of your "Specified period of rime" align with or contrast with Scan time of the current program?

    1 person likes this