Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual page 68

[Md.3149] Relative position (D54772+32sn, D54773+32sn)
The current value of work coordinate system selection (G54 to G59) is stored.
Ex.
When 1000. is set to G54
Machine position
Relative position
When in the 10000000 machine position, "relative position=0".
The relative position shifts according to the work coordinate system selection (G54 to G59).
[Md.3150] Relative target position (D54774+32sn, D54775+32sn)
The end point of the relative position in the block being executed is stored.
[Md.3152] Program target position (D54778+32sn, D54779+32sn)
The end point of the program position in the block being executed is stored.
3 G-CODE CONTROL DEDICATED SIGNALS
66
3.11 G-Code Control Axis Monitor Device
10000000
0
Work coordinate system G54
zero-position
0
Absolute zero-position
-10000000