
B–63523EN–1/03
5. AUTOMATIC OPERATION
625
In the inversion inhibition state, the program execution direction cannot
be changed. When the manual pulse generator is rotated in the direction
opposite to the direction of the previous rotation in the inversion
inhibition state, the rotation in the opposite direction is ignored. In this
case, rotate the manual pulse generator in the same direction as the
previous direction to release the inversion inhibition state.
Whether the system is in the inversion inhibition state or not can be
checked using inversion inhibition signal MNCHG <F0091#1>.
The inversion inhibition state is entered when one of the following
conditions is met:
S During execution of a block containing a code that causes a FIN wait
S During the time from the end of a block until processing of another
block starts
S During threading
S While operation is stopped in single block mode or by feed hold
The backward movement inhibition state is entered when program
execution in the backward direction cannot be performed for a certain
block and subsequent blocks.
In the backward movement inhibition state, rotation of the manual pulse
generator in the negative direction is ignored, and only the rotation in the
positive direction is valid. To release the backward movement inhibition
state, rotate the manual pulse generator in the positive direction to execute
the program in the forward direction.
Whether the CNC is in the backward movement inhibition state or not can
be checked using the backward movement inhibition signal MRVSP
<F0091#2>.
An attempt to execute the following blocks in the backward direction
places the CNC in the backward movement inhibition state:
S Program number blocks (except subprograms and macro programs)
S Blocks more than the number of blocks that can be executed in the
backward direction
S Blocks containing the following G codes and modal information:
G05 G07 G07.1G10 G10.6 G11 G12.1
G13.1G17 G18 G19 G20 G21 G27
G30.1G31 G32 G33 G34 G35 G36
G37 G38 G39 G50.3 G50.2 G51.2 G52
G54 G55 G56 G57 G58 G59 G65
G66 G67 G68 G69 G68.1 G69.1 G76
G80 G84 G87 G88 G89 G92
(G code system A)
D Inversion inhibition
D Inhibition of backward
movement