I've been getting familiar with a FANUC OM knee-mill from about 1991. With the help of people here, I've been able to download programs from a PC to the mill, and that's been working great.

Now I want to use DNC (drip feed). I've found some information on the net, but it's not clear to me what to do. Apparently, G127.5 is an important thing on the ladder. It does appear on my machine, in this context:

Code:

   F292.3      R400.5        F292.5          G127.5
---- [ ] ------ [ ] -------- [ \ ] ---------- ( ) ----
                        |                |
---- [ ] ----- [ \ ] ---|                |--- ( ) ----
   G127.5      R400.5                        G242.3
If it's important, the F292.5 appears in a more intense green on the CRT. When people talk about setting 127.5, do they mean setting bit 5 of parameter 127?

In other places it sounds like there should be a toggle switch somewhere to enable DNC. I've looked at the electronics in the case, and there's no obvious switch, but I didn't want to prod too deeply for fear of causing damage. There aren't any keys on the panel either that seem likely. In a few places on the net, it sounds like there may be a strange combination of keys that one presses. In any case, I am lost.