
5. Position Commands
5.2 Inch/Metric Command Change; G20, G21
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Precautions
(1) The parameter and tool data will be input/output with the "#1041 I_inch" setting unit.
If "#1041 I_inch" is not found in the parameter input data, the unit will follow the unit currently
set to NC.
(2) The unit of read/write used in PLC window is fixed to metric unit regardless of a parameter and
G20/G21 command modal.
(3) A program error (P33) will occur if G20/G21 command is issued in the same block as following
G code. Command in a separate block.
G05 (High-speed machining mode)
G7.1 (Cylindrical Interpolation)
G12.1 (Polar coordinate interpolation)