[solved] M66 P1 L4 Q24000 this command can make gcode iterruption?

not see sserial error .... but there is a specific pin for check these in halshow or when you talk about sserial erro you refer to user meSSAGES?
Lcnc 2.8 ja14 on these machine ... but I've suspect that the first machine have the same ... that machine is on ubuntu 14.04 Lcnc 2.8 JA current.

regards
giorgio

If you dont have any sserial errors, it seems most likely you have a very
basic problem with the signal wiring maybe a lack of common ground between
systems.

I would suggest measuring the 7I77 field input that is giving you trouble from
the back of the 7I77 card (to eliminate connector problems)

Measure from the input pin to 7I77 TB2 pin 8

I not many time to spend .. so I change PLC out pin (these pin was connect to mesa pin) ... and all works fine.
These plc It have relais out ... it is inexpensive, so that probably the contact is dirty too soon.

Thanks a Lot Mesa & PCW

giorgio