M30 stopped working!

[uremo13]

Hi!
In my company they use lathe machine EMCO 300 with sinumerik 810. Until recently everything worked fine, but at some point the M30 code won't return the program back to the beginning and start it again (we have swith for continuous cycle turned on). It makes only one cycle, than you have to press start again. I also tried to loop it with M99 but it just stopped, same as with M30 and M02. Nothing was changed in the program so we really have no idea what could it be.

Can anybody help? Is it possible that something happened with the circuit board behind the soft keys?

[lucaswalker]

Maybe somehow the code do not reach M30 ...

Lets says if you have some conditions or if you are stuck in any part of the code before reaching M30 it will not be processed by the controller.

Lets say if you execute this :

N1 IF [0NE1] GOTO 3
N2 M30
N3

the M30 is never reached even after the pgm is fully executed

[uremo13]

Maybe somehow the code do not reach M30 ...

Lets says if you have some conditions or if you are stuck in any part of the code before reaching M30 it will not be processed by the controller.

Lets say if you execute this :

N1 IF [0NE1] GOTO 3
N2 M30
N3

the M30 is never reached even after the pgm is fully executed

The code hasn't been changed so it can't be that, because it worked fine for at least a year until this month.