Fanuc Alarm PS186 ILLEGAL PLANE SELECT
Fanuc Alarm Description
The plane selection instructions G17 to G19 are in error. Reprogram so that same 3 basic parallel axes are not specified simultaneously.
This alarm is also generated when an axis that should not be specified for plane machining is specified, for example, for circular interpolation or involute interpolation.
To enable programming of 3 or more axes, the helical interpolation option must be added to each of the relevant axes.
There is an error in the plane selection command (parallel axes are being specified at the same time).