YASKAWA YASNAC J50 Connecting Manual page 147

20.2.10 MANUAL ABSOLUTE ON/ OFF(ABS)lNPUT
During the execution of part program in the automatic operation
mode, the control stores the command values in an internal com-
mandvalue register (command values aredisplyed on the 1st CRT
area), and the displacement distance between the stored value and
the coordinate value in the part program.
Since the control must also control the current position, it controls
the current values in the absolute coordinate system to be dis-
played inthe2nd CRTarea. Thecoordinate system isdefined bya
coordinate system setting command.
This input is for determining whether the current value in the
absolute coordinate system is transferred to the command value
register or not at the start of the execution of the respective blocks
of part programs in the automatic operation mode.
. When ABS input relay is open: Does not transfer.
. When ABS input relay is closed: To retransferred, except when
circuit interpolation is used.
The motion path after a manual control intervention in the auto-
maticoperation mode ischanged as follows by anABS input.
(1) When ABS Input Relay is Open
The motion path after an intervention by manual axial motion, is
the one shifted parallel from the original path by the distance
covered by the manual motion.
GQ(I (JO1 ~~().oo() FM:
X20.000 Y30.000
—0
Xlo.000
Y40,000
{
;:0.000
0.000
{
:4::::
{ x 10.000
Y40.000
(f) When the machine is manually moved during a block.
-J+:.
(2) When ABS Input Relay is Closed.
Fig. 20,7
(3) Supplementary Description
In the following cases, the control current value in the absolute
coordinate system (coordinate system displayed in the CRT
current value 2nd area, or the one determined by coordinate
system setting instructions) to the command value register
unconditionally.
(a) RESET operation: MDI panel RESET key--on or external reset
(ERS) input contact closed
(b) End of program: Program reset through end of program (EOP)
input contact closing by M02, M30 execution
(c) Automatic return to reference point: Execution of G28com-
mand
After transferring the current value in the absolute coordinate
system to the command value register, manual axial movement
is reflected on the automatic axial movement even when the
ABS input contact is closed.
When the bloko is searched again by the RESET operation
after axial motions by manual operation, the following motion
takes place.
Fig. 20.8
{ ~g'g::
u
— Axis motion by manual operation
Fig. 20.6
143