[Harmeet]

Hi Everyone

The machine is AMURA 160 VMC with Fanuc 11M control.
The problem started with PC500 WATCH DOG ALARM.
We sent motherboard for repair.
The repair person told us that the EPROM failed.
Now the problem arrises that we don't have the ladder of the machine.
My first Qustion is PC500 WATCH DOG ALARM is related to PMC of the machine.
We have found a same machine but with 15M control.
Can we copy ladder from 15M control and convert the file to 11M control for EPROM writing...??

[memoryman]

PC500 alarm may indicate a ROM/RAM board failure. As to the ladder,it was written for a specific PMC version. Yours has to match the version in the other machine. The SYSTEM screen will tell you on both machines what the PMC version is.

[Harmeet]

I understand that PMC version should be same.
As I said, if PMC version is different than can't we change the PMC type and convert the ladder for 11M.
And any suggestion about 11M ladder and which software required for that. I assume fapt ladder 3 won't work here....

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[Harmeet]

And as told by the repair person that yellow cassette ROM EPROM is faulty.

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[memoryman]

Yes, the cassette is used for the PMC. Don't know enough about writing or converting ladders to help you.

[nsdjole]

Hi Harmeet,
we solved similar problem changing bus drivers in ROM cassette, like 74ls373 or ls244.
good luck

[Harmeet]

Nsdjole... what is bus driver.
Please explain, coz I never heared about this

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[tc429]

I think what nsdjole is referring to: theres a few 74ls244 decoder/driver chips on the cassette and on the mother board...they decode the parallel buss signals between devices, and they can be a kinda common failure point on a 11...you need to find someone with a PG and PCwriter (or pgmate- socket for 11 is built in) with PMC-I/J software to see if you can read the cassette...if not readable, you might try swapping your eproms into another cassette(*most* cassettes have socketed eproms, but not all...) if still unreadable, well, then sadly your cassette eproms are dead.

I doubt the ladders are the same- but if they are, easiest way to convert is convert 15 to mnemonic data in a P-G unit, with PMC-N software (for 15-A) then load the mnemonic file into PMC-I/J (11-A) software and recompile...ladders might be close enough that only minor edits will be needed- long as you have the old paper copy, just read thru and compare every single step to verify they are a match... in any event, you need a P-G unit unless swapping the eproms into another cassette works out.

[fordav11]

if you want to re-create or convert the ladder you need specialist equipment and specialist skills. Basically forget it.

if you have access to an identical yellow cassette with an identical ladder, an EPROM programmer and some other equipment (soldering iron, powered hot air desoldering gun etc) you can remove the EPROMs and read them and program them to blank EPROMs to replace your faulty EPROM(s). I've done this many times (probably 10000 or more times over the last 15 years) when repairing circuit boards.
If you want to swap TTL logic chips (i.e 74LS373, 74LS244 etc) in the cassette and replace with new chips you must also have the above desoldering equipment and some knowledge on PCB repair and how to use the equipment so you don't damage the fragile circuit board.

[Harmeet]

thanks fordav11 for putting some light..
My idea is we have another similar machine available, but that is with 15M control.
I want to take that ladder copy and convert it to 11M machine.
So what software is required for that.
We have Eprom writer and New Eprom available.
So if you can send me software for the same.
Thanks in advance..

- - - Updated - - -

and I think 11M PMC fapt ladder 1 is required.

[tc429]

converting will require a Fanuc P-G mate(or P-G with PCWriter burner), with PMC I-J and PMC-N software. to read the 15 cassette a adapter board is required also. this stuff is old and expensive, not a lot of folks still use it- but its the ONLY way to do 0-A/10-11-12/15-A aside of onboard ram editors which are very hard to use, rewriting a ladder on a ram card editor might take a week just to type it in...you can burn a cassette off a ram card, if you have the pcwriter, but cannot upload the 15 stuff- every single bit will need typed in...text, i/o card addressing/data tables/tons of ladder...odds of a error are very high, even if something you'd done before.

if you just copy the 15 eproms with a standard burner they cannot/will not work in the 11- they are compiled using different firmware

again- pop the side cover off your cassette and see if the roms are socketed- 90% are...just get another cassette and plug your chips in to try- if its still dead you WILL absolutely need fanuc programming equipment, or contact the OEM if they are still around for a new/programmed cassette. there are no 'free' options to convert a 15 ladder to a 11 ladder- in my opinion you are wasting your time...contact the oem, if they aint around, find a 'old' retrofitter with the tools...sucks but it is what it is...

otherwise, start searching for someone with the IDENTICAL machine, willing to risk pulling their 25 yr old eproms out and have them copied...odds of that sound pretty darn unlikely- youd probably have to buy a machine, copy it/sell the machine... most owners arent going to risk turning their machine into a boat anchor... you might get lucky, another guy in here did exactly this with his bridgeport, but he was EXTREMELY lucky to find a identical machine- think he still had Fanuc come in to do the backup required to pull the data safely $$$

[Harmeet]

thanks for immediate reply
I shall revert back after some research and the points you have told me.
thanks again

[Harmeet]

Thanks all for help here,
But finally the customer here decided to retrofit the machine with 21M control.

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