[machinetoolmad]

Hi all,

Can anyone explain what LSI stands for and what its function is within the FANUC control?

[Al_The_Man]

It usually refers to the IC technology used, LSI= Large Scale Integration.
IOW multi pin DSP or CPU type IC's used.
In the early days multiple IC's were used to perform simple processes.
Al.

[machinetoolmad]

Thanks Al.
So any LSI alarms on the newer i Series controls refers to issues in the relative circuit board? Such as a 749 S-SPINDLE LSI ERROR refers to a problem with a circuit board within the amplifier...

[Al_The_Man]

I could not find that particular LSI fault in the manual, but from the other LSI descriptions it almost points to a memory problem of some kind?
I see LSI overload when tapping for instance?
Al.

[fordav11]

an error like '749 - S-SPINDLE LSI ERROR' would suggest first a faulty serial communication cable between main board and serial spindle amp module. If not then a board fault in the serial spindle amp module.
http://www.cncalarms.com/fanuc/fanuc...ndle-lsi-error
check/change the cable first, it's cheaper