[dpaulson]

I have a Fanuc 0M-A with 8K memory. I am fairly new to this, but have already exceeded this limitation and cannot load my part file ( I want to upgrade this memory and see that there are 2 empty slots 2H, 3H, 2L, 3L. Can anyone tell me if they are the same chips that is in slots 1H and 1L? I have D43256C-12L in these first slots.

[cjfisher]

D.

If memory serves the max memory that the O series can handle is 32 kB. How big is your program? Have you considered drip feeding the machine? DNC4U has been great for drip feeding my machine. There are a couple of "free" dnc programs out there that I know some of the other guys on the forum have used too. What ever you use stay away from Nclink as it is an awful dnc program. This post mentions several different dnc programs and has links to several: http://www.cnczone.com/forums/fanuc/...ml#post1706032 .

Charles

[Heavy_Metal]

Hi,

According the MEMEX-pdf for the 0-A there is a 48K (120mtr) upgrade, for the 0-B, 0-C and 0-D there is a 128K (320mtr) upgrade.

See the attached file.

Regards,
Heavy_Metal.

[dpaulson]

I now know this mill is female. I can't predict if it'll play nice or be difficult. Today my part program (6K) loaded no problem, yesterday for 5 hrs straight I could only load a couple small (1K) programs and not the one I wanted to. I use a serial BTR that I purchased from ebay Program Transfer Between USB CNC Machine VIA RS232 Parallel Port Fanuc 50pin | eBay which is more convenient that using a laptop. I haven't run across anything saying the OM-A will drip feed without some modification to the ladder (Something to do with the enabling of parameter G127.5) So I may be limited to 32K when I add in the memory.

[memoryman]

This control can indeed be upgraded to 48k; dnc/drip feeding can only be done if the control has a 'TAPE' mode.

[dpaulson]

Today is a good day. New memory installed and everything verified. 48K part programs, here I come

[riley1540]

Nice work! What sockets were empty on your machine? I have chips in 1H,1L,2H,2L and only 16k of memory....can that be right?

[dpaulson]

I only had chips in 1H and 1L. I'm thinking that if you had chips in 2H and 2L you should have 32K. Maybe it depends on what chips are in those slots. Mine were D43256C-12L and that's what I used for the other 4 chips. Maybe it as simple as changing the 901 parameter bit 3 to a 0 and bit 2 to a 1 to enable memory to 32K

[riley1540]

D43256C-12L are the chips in my machine. my 901.4 and 901.3 are both 1.

[dpaulson]

I would try bit 4 and 3 to 0 and bit 2 to a 1. It would be an easy way to double available memory.

[riley1540]

So I have checked another machine and multiple bits are set to enable memory. The second machine I looked at had three bits set and 32k. Other machine has two bits set and 16k of working memory. One is 0m-B and other is 0M-C.

[dpaulson]

Check that after using the software that Parameter 901=x1x0 0001 (where x is don’t care) for 320M on Fanuc 0B &C
or P901=x1x0 0010 is set for 120M on the Fanuc 0A. which is mine 120M = 48K
x1x0 0100 for 80M
x1x0 1000 for 40M
x1x1 0000 for 20M which mine started as 8K

[STLMachinist]

You can just try adding extra memory. But if your control does not have the correct capacity chips, you will get a RAM parity and have to clear and reload all memory.

[riley1540]

So on the 0M-C machine I added four chips and turned on 128k no problem. No parity issues at all. Reloaded ATC programs and I'm off and running. On the other machine which is a 0M-B there are chips in 2H and 2L already. No chips in 3H, 3L, 34H, and 34L. I don't know what the 34H and 34L sockets are for. I would like to set this machine up with 128k also. Are those buffer memory?

[riley1540]

I went ahead and put chips in all memory locations except 34H and 34L and can only get 48k of memory with this 0-MB master board. Anybody know for sure what the 34H and 34L sockets are for and what chipset they take?

[riley1540]

48k is all that is possible until the 34H and 34L sockets get NEC D4361C-55L chips. I'm looking for those now and should be able to expand to 128k with this 0-MB after they are installed. I will update this as soon as I can get my hands on some.