[emcomannen]

Hi!
I Need a Fanuc 0MC Expert!

Can i activate D0380.4 so my DNC function turns on?..
I dont have the tape mode on the control panel.
I hope to switch that on in the system Fanuc 0MC..

R515.1 = Auto D0380.4 = DNC on/off G127.5 DNC Function
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D0380.4 is not ON?



Some info i found on Fanuc 0M: The system with no upgrades!
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The 0 series controls came out next, with several generations of hardware. The 0M-A could not DNC at all (no parallel port, and the serial port could only upload/download). The 0M-B had an additional interface bit (accessible by the ladder logic) for DNC operation. If the machine's ladder has this function, you CAN do DNC through the 0M-B and 0M-C serial ports. On these machines, look for a "TAPE" mode postion on the mode select switch. If the mode switch only has "AUTO" and "EDIT", then you may not have any DNC
capability unless you modify the ladder (like some older 10Ms) None of the 0 series controls had the parallel tape reader port, so no BTR boards can be used

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If you have a Fanuc 0M-B or 0M-C, then it may be possible. The 0M-A never had the internal feature needed for drip-feeding files.

The 0M-B and 0M-C models have an interface bit called "DNCI", which is available to the machine tool builder through the programmable controller interface (the "Ladder logic"). If the machine tool builder put a "TAPE" mode position on your mode select switch, they're just turning on this bit when you switch to "TAPE".

Many 0M-B and 0M-C controls are shipped without a TAPE mode on the switch, but there may be a setting bit or a PC parameter that will do the same thing. For this information, you'll have to contact the machine tool builder (NOT Fanuc, because they wont' know how the MTB wired this control).
If you can't get any info from the MTB, find a local service guy or a retrofitter that can read and understand your ladder logic and tell you if it's there or not.

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The tape input is installed as part of the function switch by the machine tool builder, he may have excluded it. Normally to run in drip feed on a 0, you have to be in auto, the DNCI signal has to be set on from the PMC side to the CNC, this is bit G127.5 in the ladder, often done with a toggle switch or AUX switch.
You should be able to use a 3 wire cable and use software handshake in your PC program.

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Normally the internal register G127.5 has to be set on with a switch, which is written into the PMC by the MTB.
You can look at the register in the Diagnostic screen, in some cases the switch has been added inside the panel.

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It depends. The Fanuc 0MB and 0MC had an interface signal (available through the ladder) called "DNCI".
If this signal is turned on, then when you're in "AUTO" mode, you can run directly off a PC through the serial port. When the signal is turned off, the AUTO mode only runs from memory, and all you can do is download a file to memor through the serial port. The machine tool builder (not Fanuc) would have had to have made a provision to turn this signal on. Sorry that the answer is a bit complicated, but only your machine tool builder can answer your question.

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[fanuservicetech]

DNC is not a Fanuc option in the case of your machine. I assume your machine already have "TAPE" or "REMOTE" mode on your mode selection switch? If you need to just turn on the D0380.4 (Under Diagnostic screen) ==>
Press PARAM/DGNOS key and page down to DGN 380. See if it is in binary format. i.e.
DGN 380 = 10000100(example). If it is already in binary format, just chage the bit #4 (the fifth bit from right) = 1.
If the DGN 380 is not in binary format. i.e. DGN 380 = 150 (example), press PARAM/DGNOS to go back to Parameter screen and cursor down to parameter #19 and chage PRM 19 bit 7 (1st bit from left) (either from 0 to 1 or 1 to 0, I don't remember exactly but just change to 0 if already 1, to 1 if already 0). Anyway, it will ask you to turn the control power off and on. Now go back to DGNOS screen and it should be in binary. Ofcourse you need to be in MDI mode and parameter write enable PWE (on setting page) needs to be 1 to be able to change parameters.
By the way, this is not some Fanuc secrete information and it is available in Fanuc manuals.

[Jung]

To turn on DNC mode, diag 380#4 should be 0.
Select Auto mode and check if diag 127#5 = 1
If diag 515#1 and diag 380#4 = 0 then diag 127#5 should be 1.

Try to in/out memory program to be sure that RS232 works before turn on G127.5

I have tried turn on G127.5 on OMA/B/C, DNC mode works all.

[emcomannen]

Hey!..
Thansk for the help..
The 127.5 is activated now, with alot of help from my friend after i show him your posts.
I put the machine in Auto mode and press the cycle button. In program, lower right corner a sign flaching.

Got some alarm 086 , 128.. Must buy some manuals for DNCI and G-code programming.

[feda]

hi all, sorry for resuming an old post and sorry for my english i'm italian, i have the same problem...i have a fanuc-0MB and i am not able to run programs in dripfeed mode, i dont have any switch to enable the tape mode and the MTB is disappeared as my cnc has about 15 years, i tried the procedure of changing DGN 380.4 but anything changed..... the problem is that i cant display the ladder and i cant change G127.5, there isnt any other way to display the ladder and modify it? thanks william

[Jung]

You cannot turn DNC on with D380.4 except your machine is same series with Emcomannen's.

hi all, sorry for resuming an old post and sorry for my english i'm italian, i have the same problem...i have a fanuc-0MB and i am not able to run programs in dripfeed mode, i dont have any switch to enable the tape mode and the MTB is disappeared as my cnc has about 15 years, i tried the procedure of changing DGN 380.4 but anything changed..... the problem is that i cant display the ladder and i cant change G127.5, there isnt any other way to display the ladder and modify it? thanks william

[christ_himself]

i do myself a way a guy told me to do and it work with no tape switch

dgnos 533=00001000= dnc mode
dgnos 533=00000000= memorie mode

to verify the the dnc mode is on, edit a program then go on auto if no program is showing you are in dnc mode

to start programe go in auto, single bloc, ready your computer then press Feed start until first movement then remove single bloc