Vlado,
About the battery - yes, all of them - parameters, programs, offsets etc. And the alarm usually says just that - no battery!
Put new batteries, hold RESET and DELETE buttons down and switch on the control. This will clear the RAM memory and the check sum will be correct. After that enter all the parameters, diagnostic data and programs from your backup. If you do not have it - look for ...
Thread: Fanuc 3M-model C  |
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Started 1 month, 4 weeks ago by vavco
Hello everyone, could anybody give me any advice how to solve the problem of a grinding machine with Fanuc 3M-C (main board A16B-1000-0010).After powering the machine up , switching NC on , alarm "RAM parity high" is displayed
on the screen . Is it a hardware or software problem? I could tell more what I found out during checking the electric parts of the machine. Could anybody tell me more ...
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vavco replied 1 month, 4 weeks ago
Thanks a lot , f-bu . To explain more: I was called to have a look at this machine,
because I do running my own business (fixing all kinds of electronic) .So , I can
say, I'm not the beginner , but as to this Fanuc , so far I have not got any experiences
with it. Old grinding machine (1985 ?) with this Fanuc has not been working for a longer
time due a mistake which was made by one man...
Size: 1,824 bytes
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f-bu replied 1 month, 4 weeks ago
Hi Vlado,
Replace 75463, hope the high voltage stopped there. Check the bypass capacitors also. If 220V came to the board trough the outputs, electrolitic caps on +5V are blown, also check 74259( ?? maybe, can not remember, the chips driving the 463's.
If the board was a long time without battery, there is of course nothing in the RAM, so copy parameters from 0 till 99 and from 996 till 1050 ...
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vavco replied 1 month, 4 weeks ago
Hi f-bu, by the way, it is strange for me to call you f-bu.However, your advices
told me that you know what are you writing about. Yes , you are right. 75463 were
replaced, according to my research , it was likely a short circuit between +24V
and AC 100V . ( relays are supplied by +24V , their contacts use AC 100V to
supply other relays) . So AC100V came into 75463. I suppose , opened ...
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f-bu replied 1 month, 4 weeks ago
Vlado, You said there is same machine, in working condition. I mean copy from there the parameters/diagnostic and enter in yours.
What I do not understand ( from your message) is : Could I copy
any parameters from a broken machine ( with a.m alarm) ? I just spent 2-3
hours with broken machine, so I did not try anything ( I could not because I had
not any knowledge and experiences) . You ...
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vavco replied 1 month, 4 weeks ago
Thanks f-bu , I had to reread all you wrote me yesterday, I did understand
more of it , now(your last advices) I think , many things are more clear for
me. Right now ,I'm still far from the machine, so I can not try anything,
(maybe I could, if I have had panel with mentioned buttons and I have made
connection from CRT to some monitor to see the result ). I want
to be prepared ...
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vavco replied 1 month, 3 weeks ago
Hello f-bu . I'm in the front of the machine and I'm trying to do everything what you reccomeded me .I copied all parameters from working machine, set the main board into
the machine, connected battery and all connectors. With pushed RESET + DELETE buttons
turned NC on. I was wrong when I wrote there is RAM memory alarm on the a couple days ago.What is really on it ,is :
SYSTEM ALARM No.3...
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vavco replied 1 month, 3 weeks ago
Hello f-bu once again, I had to turn Parameter switch to "enable" position
before I turned NC on(while holding reset +delete) ..... now it works , I entered all parameters and there is no error.. only, there is NOT ready message there, I found out
that I could not move axises X and Y. It seems , some of the over travel switch in
X axis is overcome. ( when I use JOG to -X direction, I ...
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f-bu replied 1 month, 3 weeks ago
You are welcome, Vlado, really, I had to tell you to set PARAMETER WRITE ENABLE switch on before clearing memory.
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