Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 334)

Overtravels and Programmable Zones
Chapter 12
12-6
Programming
this G-code:
turns Zone 2: turns Zone 3:
G22 On On
G22.1 Off On
G23 Off Off
G23.1 No Change* Off
* A G23.1 turns on programmable zone 2 if it is the default
power up condition configured in AMP (also activated at a
control reset). G23.1 does not turn on programmable zone 2
when it is activated in a part program.
G23 is normally automatically made active at power up, though this is
ultimately determined by the system installer in AMP. Your system
installer also determines in AMP if an M02 or M30, control reset, or
E-STOP reset cancels programmable zones that you have turned on or off
while executing your program.
Important: If you program a G22, any axis words included in the block
are stored as the coordinates for programmable zone 3. See page 12-7 .
If you attempt to program some other command in a G22 or G23 block, for
example:
G22 G01 X12.;
the control issues the error message:
“UNUSABLE WORDS IN ZONE BLOCK”