Fanuc 6M - error 996

[k-linkz]

Hi guys,

I've replace my ROM card yesterday (was having error 930 before) all worked well.
No more errors. Was able to work with the machine.

Today i started the machine i get error 996

I've found this tread http://www.cnczone.com/forums/fanuc/...ror-996-a.html

but i don't see anywhere on the card E36 - F36 - etc..

could it be because i have a 6M instead of 6T.

i'll try to switch the chips from the original to the new board and see if that make any difference.

model a20b-0008-0480

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[k-linkz]

[k-linkz]

so I've change the switch the chips on the board
i still get 996 as and error.
i've also covert the board with chips so no socket would be left empty. still get error 996.
i don't understand yesterday it was working well.

[k-linkz]

[k-linkz]

update

clear the parameter. Re-input the parameters by hand.
machine work. cannot do the zero on the Z and Y axis as the soft limit doesn't seem to work and hit hard limit switch axis (must have have miss an input parameter 1 or 0 somewhere). X axis is able to do zero.

my main issue is if i power down the machine and restart it i get the error 996 back, hence forcing me clear the parameter and re-insert them every time.

So i've check the small 1.5v battery on the other side of the machine. it was showing 0.4v so i'll change it for a new one. not sure if i just putting a durecell 1.5v battery or one that is rechargeable.

[memoryman]

The Fanuc 6 series normally does not have batteries.

[k-linkz]

Could this be related to the bubble memory ? I don't understand why it doesn't keep it's memory parameter once i input them. after the restart it show me again 996.

[memoryman]

If the control has a PC-A or-B, check their parameters.

[k-linkz]

it's a PC-B.Shows 996 clear parameters. re-input them but it does keep them as soon as i turn the machine off. it show 996.
wondering if there is a way to disable the option available (and if so what option do i have to disable).

I order another RAM card i thing it may be related to the version and spec. we have an A20B-0008-0480/03A it seem to have come from 6T maybe this is the issue.

the card i order has A20B-0008-0480/02A seem to come from a 6M maybe it will work.

[memoryman]

A20B-0008-0480 is a ROM board, containing the SYSTEM ROM and PC-A eproms.. There is no -T or -M version.

[k-linkz]

A20B-0008-0480 is a ROM board, containing the SYSTEM ROM and PC-A eproms.. There is no -T or -M version.

Thanks for the reply, much appreciated.

what i get from the appendix Fanuc 6m- model B (loading page when powering the machine) on the maintenance manual page 424
it says that only PC-B can display 20 data item per screen - PC-A seems to only display 1 at the time
and I have 20 data when i press Param.

in this post i see someone a similar issue
http://www.cnczone.com/forums/fanuc/...ror-996-a.html
But when i look at my Rom Card i don't see the E35,E37,E39,F35,F37,F39 and possibly e42,f42,e43,f43. That you and him were talking about (i only have E1 E2 E3 E4 and E7 - same for F1 - F2 - F3 F4 and F7)
Even more my E - F row where empty and the machine work for 8 years before.

Also it's not clear to me which Rom he exchange from the old to the new.
Could you clarify for me please.

[memoryman]

Unless the 'new' board has system software that is known to work on your machine, I would change ALL the eproms on rows A,B,C and D. Be very careful about how you handle them; bent/broken pins, reversed, wrong locations.

[k-linkz]

Unless the 'new' board has system software that is known to work on your machine, I would change ALL the eproms on rows A,B,C and D. Be very careful about how you handle them; bent/broken pins, reversed, wrong locations.

I've exchange the eproms A,B,C,D with the New board.
results : Old board with "new" eproms ==> 996 cannot keep the parameters once the machine is turn off
New board with "old original" eproms ==> 930 error (make me think that one of the eproms chip might be dead)

i'm receiving another ROM card from ebay this week will keep you update.

I'm wondering why doesn't it keep the parameter i fallow the process in the manual maintenance to the letter.

The only thing i can think of is that it might have come from an 6T model since i found that error on the 6T maintenance manual (error 996) but didn't find that error (error 996) on the 6M maintenance manual.
However from a ROM card perceptive i don't think if make any difference if it's a 6M or 6T. But i could be wrong.

well we'll see when the "new" second ROM card get here it i guess.

[k-linkz]

So I've received the ebay ROM card
I've installed on the machine and start it.


I get an U and W axis (must have been part of an lather machine) we have a milling 3 axis.

i shutdown the machine
rewrite the parameter and get error 996 again.

anyone know how to fix this please ?

[agering]

Please, check on main board RAM chip HM6116 setting. If there is absent pair chip that it is need to install. This can be a reason of the error 996.

[memoryman]

You need to use the same software or one that you KNOW is compatible with your machine.

[k-linkz]

You need to use the same software or one that you KNOW is compatible with your machine.

I'm not sure i understand what you mean by ''software''. Do you mean the parameters of the machine ?. Could you clarify.

We've only replace the ROM card A20B-0008-0480. Delete the parameters and re input the parameter manually (which by the way if anyone has a way to input them via a PC connection instead of punching 0 and 1 for one hour i am all ears). Can I DNC the parameters ? I've DNC some design parts before, but since i'm erasing the parameters every time in order to by pass the 996 error. i'm not sure how it works.
does it go to a default mode.

If by ''software'' you meant the Operating System where it display Fanuc 6M - B v. 9.0 when you powering the machine. Could you tell me the step. I've look into the Fanuc 6M maintance Manual didn't find anything. I'll look again later today maybe i've miss something.

Thank you guys once again for helping my troubleshoot this issue.

[k-linkz]

Please, check on main board RAM chip HM6116 setting. If there is absent pair chip that it is need to install. This can be a reason of the error 996.

Hi could you explain how to check the HM6116 setting ? could you clarify main board RAM chip ? Are you talking about the Master PCB or the ROM card ?

Attachment 340618

[agering]

Need check RAM chip on mother board A20B-0008-0410 or A16B-1000-0030. Please, tell me the series and version of software which appears on CRT when system power on with pressed Emergency button. This information allows to know the functionality and RAM options of this software.

[memoryman]

yes, by ''software'' I mean the Operating System where it display Fanuc 6M-B M51 version 9, or something similar. This Operating System is in the rom chips on the ROM board.