G90: Absolute Value Command - Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual

G90: Absolute value command

The coordinate command is executed as an absolute value command.
Code Format
G90
G90 X x
Processing details
• In absolute value mode, positioning to the position commanded by the program is performed with no regard to the current
position. Positioning commands set after the execution of the G90 command use the absolute value from the home
position.
Ex.
G90 X100. Y100.
Y
100 (100,100)
50
Current position (50,50)
0 50 100
When current position coordinates are X50,Y50
• Within the same block, a specific address only as an absolute value, or an incremental value can be commanded. The last
executed command in the block remains valid as a modal command.
Ex.
G90 X100. G91 Y100.
Y
150 (100,150)
100
50
Current position (50,50)
0 50 100 150
When current position coordinates are X50,Y50
• The G90 command is modal. It remains in effect until incremental value command mode (G91) is commanded.
• The mode at the G-code control start, or reset can be set in [Motion Control Parameter][G-code Control Parameter][G-
code Control System Parameter]"Modal Initial Setting""Absolute Setting".
Y y Z z
Coordinate command
Y
100
50
X
0
When current position coordinates are X80,Y20
X
[Unit: mm]
(100,100)
Current position (80,20)
X
50 100
5 G-CODE CONTROL PROGRAMS
[Unit: mm]
5.6 G-Code
5
157