Dears,

We have a Vision Wide CNC machine center, and it has the following alarm

Spindle servo alarm No. 750 : spindle serial link error

the spindle servo Amplifier module does not showing any number, just (_ _) is blinking


we checked the following:

the diagnostic parameter 409 bit#1, S1E=1

the parameter 3701 all bits are = zero.

we have checked the fiber optics cables and it has no problem.

any help?