Yaskawa YASNAC PC NC Programming Manual - Manual (Page 69)

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YASNAC PCNC Programming Manual Chapter 3: Movement Control Commands
3.2 DETERMINING THE COORDINATE VALUE INPUT MODES
This section describes the commands used to input coordinate values.
3.2.1 Absolute/Incremental Designation (G90, G91)
These G codes specify whether dimension values specified following an axis address are given in
an absolute value or incremental value.
(1) Using the G90/G91 Command
(a) Features of G90 and G91
Table 3.2.1.1 Absolute/incremental Designation G Codes
• G90 and G91 are modal G code belonging to 03-group. If G90 and G91 are specified
in the same block, the one specified later is valid.
• The power-ON state, that is the G90 or G91 mode that is valid when the power is
turned ON, can be set for parameter pm4000 D1.
• The reset-state, that is the G90 or G91 mode that is valid when the NC is reset, can be
set for parameter pm4000 D6.
pm4000 D6 = 0 and pm4000 D 1 = 0: Reset-state is G90.
pm4000 D6 = 0 and pm4000 D 1 = 1: Reset-state is G91.
pm4000 D6 = 1:The G code (G90 or G91) that was valid before reset,
disregarding of the setting for pm4000 D1.
G code Function Group
G90 Absolute designation 03
G91 Incremental designation 03
pm4000 D1 = 0 Power-ON state is G90.
pm4000 D1 = 1 Power-ON state is G91.