ace21122112

MrPLC Member
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Posts posted by ace21122112


  1. Hi all I have a conveyor with an encoder on it, it is powered by a vfd speed referenced by analog output on a Micrologix 1400. I want to gradually decrease the speed of the conveyor after product Leaves the conveyor (ie as the hsc accumulates) and shut it off completely after a preset limit What is the best instruction to tackle this problem.

  2. They are supposed to be enabled However to break the test down to be simpler I have another cable that I cut up... If I connect 1-4-6 together and 7-8 together and leave rest of wires open should I not still at least see activity on the LED's? As far as D8120 is concerned You mentioned to me one other time how to change it was it in the project tree >> parameter >> PLC system[2] If so I have Operate communicatin setting - checked Protocol -Non procedural data length 7 Parity - Even Stop bit -1 transmission speed 9600 header - unchecked terminator - unchecked control line - unchecked H/W type -regular/RS-232C Control Mode - Invalid Station number setting 00 time out judge time 1ms However interestingly enough D8120 seems to be still 0

  3. Like to know how to make a RS instruction work using a FX1S PLC (I'm told its supposed to) See attached... As I understand it when I close X1 contents of D1 - D4 should transmit out but I cant get any activity (using null modem cable connected to computer running Serial Communicator program) Not interested at this point in recieving anything back hence the D5 as a dummy recieve destination [D] and 0 as number of words in data elements[n]. When I test I get nothing not even any activity on the status LEDs of the 232-BD so somethings amiss rstest.zip

  4. I work for a company that sells a fair bit of machinery to the US Most is 120V single or 460 3 phase but sometimes its 230V single. Whenever we do go with 230V I have to include a transformer to convert the US voltage which seems to be always 3 wire to 4 Wire with a neutral.. US 230V power is hot-hot-ground with 120 between legs correct? If so is there any reason why 4 wire seem so uncommon.... Is it because the secondary of feeding transformers are delta?

  5. Ive done a few curtain instalations for cat 3 and 4, the muting controller has always done the checking and I have used conventional photo eyes and never had an issue with an inspector so I would think any muting sensors would be fine. seen 2 and 4 beam methods. found that the four beam method works best the 2 beam diagonal is very finicky esp if your dealing with an odd shape product

  6. Working on this program here for GX developer. For some reason I can not write a value into D9 with an HMI nor with the entry data monitor with the HMI disconnected. Appears to be a compile time issue. prog.zip

  7. I was working with Gx developer today don't know what I did but my main window that shows ladder logic went real big... Used to show step numbers on the side of the program now doesn't....If i restore down everything shows but not when maximized... zoom is set to auto.... whatever I have done only effects the one program... anyone know what i did and can tell me how to return this back to normal?