I have a Mori Seiki SL-1 with Yasnac 2000G control here.

It does the zero return on Z fine. The axis rapids to the deceleration switch, decelerates & then the Z zero return LED lights.

On the X axis, the axis rapids, but does not decelerate when it hits the LS15 deceleration switch & then it spits an over travel alarm when it inevitably hits the over travel switch.

I have tested the LS15 switch & it is working both on the L15 wire in the cabinet & in the NC inputs on the Yasnac display.

Does anyone have any ideas? The machine works perfectly apart from that.

Many thanks

Nick