Fagor CNC 8055i, Installation Manual

Page: 489 / 732

Installation manual
CNC 8055
CNC 8055i
LOGIC CNC INPUTS AND OUTPUTS
12.
S
OFT
: V02.2
X
·489·
Genera
l logi
c in
puts
/FEEDHOL (M5002)
When the PLC sets this signal low, the CNC stops the axes (maintaining spindle rotation). When
the signal returns to the high logic level, the movement of the axes continues.
If the /FEEDHOL signal is activated (0V) in a block without motion, the CNC will continue the
execution of the program until detecting a block with motion.
/XFERINH (M5003)
If the PLC sets this signal low, the CNC prevents the following block from starting, but finishes the
one it is executing. When the signal returns to high logic level, the CNC continues to execute the
program.
CYSTART (M5007)
If the START key is pressed on the front panel of the CNC, this is indicated to the PLC by means
of the general logic output START.
If the PLC program considers that there is nothing to prevent the part program from being executed,
the CYSTART signal must be set at a high logic level, thus beginning the execution of the program.
The CNC will indicate by means of the general logic output INCYCLE that the program is being
executed. As of that moment the CYSTART can return to low logic level.
SBLOCK (M5008)
When the PLC sets this signal high, the CNC changes to the single block execution mode.
The treatment this signal receives is similar to that given to the "single block" softkey.
MANRAPID (M5009)
If the PLC sets this signal at a high logic level, the CNC selects rapid feed for all the movements
executed in JOG mode.
When the signal returns to a low logic level, the movements executed in JOG mode are made at
the previously-selected feedrate.
The treatment which this signal receives is similar to that given to the rapid feedrate key on the control
panel.
The EXRAPID (M5057) signal is similar, but for movements in execution mode.
OVRCAN (M5010)
If the PLC sets this signal at a high logic level, the CNC selects 100% feedrate override, irrespective
of whether this is selected by the PLC, DNC, program or by the front panel switch.
While the OVERCAN signal is activated (logic 1), the CNC will apply in each mode 100 % of the
feedrate corresponding to that mode.
Sample
( ) = /FEEDHOL
There is always permission to move the axes.
Sample
( ) = /XFERINH
There is always permission to execute the next block.
Sample
START AND (rest of conditions) = CYSTART
When the cycle START key is pressed, the CNC activates the general logic output START. The PLC
must check that the rest of the conditions (hydraulic, safety devices, etc.) are met before setting the
general input CYSTART high in order to start executing the program