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Thread: 086 Alarm on Fanuc OM

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    Default 086 Alarm on Fanuc OM

    I am new to CNC and bought a Mill with a Fanuc OM control. When trying to upload DNC, I press the input key and LSK flashes momentarily and an 086 alarm appears on the monitor. I believe the problem has to do with parameters, as this occurs before the upload starts and even occurs when the comms cable isn't connected. Any help would be appreciated. Thanks

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    Community Moderator Al_The_Man's Avatar
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    The Data ready signal is detected as off. I would make sure you have the 3 wire 2,3, and 7 for a 25 pin D. communication cable, with the handshake jumpered out 4-5 & 6-8-20.
    If the cable is disconnected it probabally will fault for sure.
    See Cadem.com for the cable connections and parameters.
    Al.

    CNC, Mechatronics Integration and Custom Machine Design (Skype Avail).

    “Logic will get you from A to B. Imagination will take you everywhere.”
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    Hello Al,
    Thanks for this. Is it possible that some DNC packages require a non-standard pin-out config. The reason I ask is that I bought the comms cable from a Fanuc specialist and they tell me it is guaranteed to work with an OM control (except it does not with Alphacam DNC). Thank you.
    Darryl



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    Community Moderator Al_The_Man's Avatar
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    Fanuc generally show two types of cables, handshake connected and H.S. jumpered out as I mentioned.
    Check to see what type of cable they sold you. If you cannot make the cable up yourself, tell them you want a three wire cable with the Hand shake jumpered out both ends.
    And confirm that AlphaCam can be set for software handshake.
    Al.

    CNC, Mechatronics Integration and Custom Machine Design (Skype Avail).

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


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    I've had a lot of problems with the older OM and 6T controls... and only half of our machines will upload. They download fine but get the 086 alarm on upload... Our millwrights believe this is a problem on the board an the company would rather us enter a 5 page program by hand then replace the board (running high volumes).

    Try write a program on the controler and then send it to the PC. If you can punch and not read, I don't think it's the cable. It could be one of the boards in the controller or, maybe someone knows of a parameter that would cause this?



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    Community Moderator Al_The_Man's Avatar
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    Quote Originally Posted by Heavy D

    Try write a program on the controler and then send it to the PC. If you can punch and not read, I don't think it's the cable.
    Not neccessarily true as the DR signal is a separate line for each direction, if the PC is not looking for it, often uploads to PC work where the problem shows up on downloads to the CNC.
    This is why it is best to have handshake jumpered out.
    Al.

    CNC, Mechatronics Integration and Custom Machine Design (Skype Avail).

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


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    Well then he should try it with a cable with handshake jumpered out. The reason I say this is because I make my own cables and they are the same pinout, jumpers that you mention. But like I said, some 0M, 6T controls in our shop will punch a program no problem but get the DR signal alarm when you try to read a program. My problems with these controls have not been with the cable as I've tested the cable for continuity and verified pinouts.



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    Default Cable OK

    I got a little further than before and managed to type INPUT without the 086 alarm activating. However, I left a 6k prog uploading for an hour (LSK flashing all the time) but felt convinced nothing was actually happening. I switched off the machine after a while and when I switched it back on got the following errors:

    101; 416; 426 and 436.

    To fix 101, I consulted the manual and tried to set PWE to 1 to carry out a memory clear procedure, but the control will not respond to editing of this param.

    I would really appreciate any help regarding any of the errors. Thanks



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    One thing you might want to check, fairly simple and easily overlooked. The individual pins on the connectors can become disembobulated and not make a connection or an intermittent connection. I've seen it more often on the female side(go figure). Check to see that you are making good connection, sometimes over time and lots of use the male pins on the cable will push their individual female counter parts in a bit or stretch them out...usually resulting in some head scratching, cursing and cigarette smoking. You may have already checked that but I thought I'd throw it in the mix .



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    Do you have data protect key turned off? Must be in edit mode with key actuated
    to upload. Don't need it to download. Also when you download make sure you set p389.2, 10.4 to 0 to allow download of 8000 and 9000 programs. Hold eob key simultaneously with output start while starting download of cnc parameters to get option paras. Other paras you need to set are: paras 2.0 to 1, 38.6 & 38.7 to 1,
    552 to 10 for 4800 baud (best especially for 0 control to avoid buffer overrun on
    upload). When downloading part programs type 0-9999 to get all prgrms. Hope this
    helps.



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    Thanks 'Spark-el' for the very useful param settings. It makes total sense to me that the params are causing the upload difficulties. Right now however, I have no control of the machine due to the 101 alarm. The manual states you should edit setting data PWE to 1 and then press delete while switching on to clear the memory. The problem is I know what to do but while the alarm is functioning I cannot edit this setting. Any workarounds to get control of the machine back would be very welcome. In addition to alarm 101, I have 416, 426 and 436. It may not be necessarily 101 that is stopping me edit setting data PWE.

    BTW, I don't believe the upload got far enough to be the problem mentioned by 'Tolk', but it is useful to know. I will make sure the connectors make good contact to minimise a comms outage.

    Best,
    Darryl



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    On your memory clear operation, are you turning control off
    then holding delete button on power-up? This should delete
    all part programs and clear the fault. The other faults are all
    apc battery low. Make sure you leave main power on when
    replacing batteries, or you will have to re-reference all axes.
    After clearing all faults you should be able to upload.
    Good luck, el



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