Modulo programming in relative coordinates

G91 G1 C+30

G91 G1 C-30

Example for correct programming:

C+200 Rotate in positive direction to current position plus 200
C-200 Rotate in negative direction to current position minus 200.
C200 Rotate in positive direction to current position plus 200

Example for wrong programming:

C+-200 Error: Negative motion path during rel. programming not allowed.
C--200 Error: Negative motion path during rel. programming not allowed.
P1=-1
C-[P1] Error: Negative motion path during rel. programming not allowed.