Need Help!- BUS ERROR on Fanuc 11M

[guhl]

advise please, who managed to fix this problem
master PCB: A16B-1010-0330
ROM PCB: A16B-1211-0280
I see that error appears when system checks the RAM
ROM PCB has been replaced
RAM ICs replaced, ecept soldered ones
ROM IC's reburned

[alexfanuc]

Power on pushing "." and "-". Are you able to see the "IPL" mode?
Bus error happens because a pcb is coming out from the master pcb.
Check that all the pcb are in place correctly.
Regards

[guhl]

if I press RESET IPL appears
all PCBs are placed correctly
a couple of times system booted, but then got hanged

[alexfanuc]

Originally Posted by guhl IPL doesn't appear all PCBs are placed correctly a couple of times system booted, but then got hanged

Master PCB has a display. When you power on , what do you see in the display?

[guhl]

8,7~3 then E

[alexfanuc]

Originally Posted by guhl 8,7~3 then E

Probably a short.
There is a problem in the IO board.
Check for a short circuit (24VDC)
Regards

[gbowne1]

Yeah. I'm no expert but thats what it sounds like to me. see if you can locate any shorts across the I/O chain.

[guhl]

when we try make memory dump from address FF3..., sytem shows address FFC...
now we suppose that some functional block "address decoder" is fail
does anybody have a memory map for 11M series with digital servos?

[alexfanuc]

Originally Posted by guhl when we try make memory dump from address FF3..., sytem shows address FFC... now we suppose that some functional block "address decoder" is fail does anybody have a memory map for 11M series with digital servos?

Try and disconnect cables to the I/O board and then try to power on.
Do you have a memory backup?
If you have a memory backup you might try to erase memory.
Try to power on pushing - and . (minus sign and a dot sign). See if it powers on in the IPL mode.

Regards

[guhl]

Originally Posted by alexfanuc Try and disconnect cables to the I/O board and then try to power on. Do you have a memory backup? If you have a memory backup you might try to erase memory. Try to power on pushing - and . (minus sign and a dot sign). See if it powers on in the IPL mode. Regards

alex
why do you ask me about I/O card? I disconnected all the cards from the masterboard, except PMC cassette and ROM/RAM board
this system equipped with BMU memory
I can call IPL mode throgh RESET button when the screen shows the content of memory and "SYSTEM ERROR" message
now I need memory map to locate the address decoder on masterboard
ordinary way to call IPL trough "." and "-" is unavailable

[alexfanuc]

Originally Posted by guhl alex why do you ask me about I/O card? I disconnected all the cards from the masterboard, except PMC cassette and ROM/RAM board this system equipped with BMU memory I can call IPL mode throgh RESET button when the screen shows the content of memory and "SYSTEM ERROR" message now I need memory map to locate the address decoder on masterboard ordinary way to call IPL trough "." and "-" is unavailable

If there is a pcb missing in the CNC con control, you will have a system alarm error. I´m just trying to figure it out, if you have memory or not before you erase the memory. If you have a ram parity alarm you must erase memory. An "E" in the master PCB means one of the following:
a)you probably are missing one of the PCBs
b) you have a short in 24VDC line, (This is why I asked you to disconnect cables to the IO board)
c) You lost memory (you must erase the memory and upload all the info again)
d) You have a bad master pcb
Not all the CNC software will display an alarm in the CRT
If you are trying to power on the control with one of the pcb missing you will get a system error and an "E" in the master pcb.
Do you have all the parameters of the machine? if so, you might want to erase and upload the memory again.
Good luck!

[guhl]

alex
24V short usually causes fuse blowing
read, please, yellow fanuc book where error "E" is described
BTW my machine is Hitachi Seiki with its own PLC and there is no I/O cardson PCB

master PCB LED content and its meaning
9 ..... CPU START
8 ..... RAM CHECK --- If it is error, Change to “b”
7 ..... RAM CLEAR
6 ..... BAC INTIALIZE, SDC (Serial DMA changed) DATA TRANSMISSION START

If it is error

A ..... SDC CHANNEL 0 or CHANNEL 2 COMUNICATION ERROR (MDI/CRT
COMUNICATION ERROR)
C ..... CHANNEL 0 OR CHANNEL 2 ID NUMBER WRONG
F ..... SDC CHANNEL COMUNICATION ERROR
H ..... CHANNEL 1 UNIT ID NUMBER WRONG
c ..... SDC ERROR LEVEL 7 INTERRUPT (CRT POWER SUPPLY,I/O PCB PROBLEM)
J ..... WAITING ANSWER FROM PC

5 ..... READING MDI KEY SWITCH
4 ..... CRT INITIALIZE
3 ..... INITIAL SCREEN (SOFTWARE SERIES AND VERSION DISPLAY)

L ..... WAITING PC READY

0 ..... IPL MODE
2 ..... SYSTEM SOFTWARE INITIALIZE
1 ..... SYSTEM START

E ..... SYSTEM ERROR