M66

Andy,

Example g codes should be consistent with good g code practices.

For example...
linuxcnc.org/docs/html/gcode/m-code.html#sec:M66-Input-Control

M66 Example Lines

M66 P0 L3 Q5 (wait up to 5 seconds for digital input 0 to turn on)

Is a proper easy to read example.

P0 L4 M66 Q5

Certainly could be considered the slightest bit ambiguous, and possibly confuse the issue.

Rick G

Thank you, your example works fine.
I just do not get it to work with a separate sub.
for example, "call o100" in the program gcode
then in the sub:

o100 sub
M66 P0 L3 Q5
if [# 5399 LT 0]
(MSG, fail)
endif
o100 EndSub

give error:
parameter name that starts with F unknown

You need O-numbers for the IF too.

All ok thanks !!