Fagor CNC 8060, Installation Manual

Page: 431 / 698

Installation manual.
CNC 8060
CNC 8065
LOGIC
CN
C INPUTS AN
D OUTPUTS.
6.
Mo
difiab
le sign
als fo
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axe
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les.
·431·
(R
EF
: 1709)
SPENA(axis)
DRENA(axis)
The PLC uses these marks to enable the drives when communicating via Sercor or to enable
the servo drives and inverters when communicating via Mechatrolink. The SPENA(axis)
mark corresponds to the "speed enable" signal and the DRENA(axis) to the "drive enable"
signal of the device. The operation of these two signals is the following.
The operation of these two signals is the following.
• On PLC power-up, it must cancel both signals.
• For the device to run normally, both signals must be active. The motor will respond to
any changes of velocity command.
• If the PLC cancels the DRENA signal (drive enable), the power circuit of the device shuts
down and the motor loses its torque. In this situation, the motor is no longer governed
and will turn freely until it stops by inertia.
• If the PLC cancels the SPENA signal (speed enable), the internal velocity command of
the drive is switched to "0 rpm". In this situation, the motor keeps its torque while braking
and, once stopped, the drive's power circuit shut down and the motor has no torque.
PARKED(axis)
The PLC sets this mark high (=1) to let the CNC know that the corresponding axis or spindle
is parked.
For further information, see the consulting signals for axes and spindles: PARK and UNPARK
described earlier in this chapter. See
"PARK(axis) UNPARK(axis)" on page 402.
LUBRENA(axis)
LUBROK(axis)
These marks together with the axis consulting signal LUBR(axis) must be used to lubricate
the axes. See
"LUBR(axis)" on page 401.
The LUBRENA mark indicates whether to use this feature (=1) or not (=0). With LUBRENA
set to (=1), the CNC acts as follows:
1 When the axis has traveled the distance set by (a.m.p.) DISTLUBRI, it sets the LUBR
mark high (=1) to let the PLC know that the axis must be lubricated.
2 After lubricating the axis, the PLC sets the LUBROK(axis) mark high (=1) to let the CNC
know that the axis has been lubricated.
3 The CNC sets the LUBR mark low (=0) and resets its count to "0".
Remind to set the LUBROK mark low (=0) so the feature works properly. Otherwise, its count
will always stay at "0".
DIFFCOMP(axis)
This mark is used on Gantry axes to correct the position difference between the master and
the slave axes. The slave axis will move until reaching the position of the master axis at the
feedrate set by parameter REFFEED2.
The correction must be enabled in machine parameter DIFFCOMP and it is applied in the
following cases.
• With the up-flank of SERVO*ON if DIFFCOMP is set high.
• With the up-flank of DIFFCOMP if SERVO*ON is set high.
This process can only be interrupted with RESET.
FBACKSEL(axis)
The CNC uses this mark when the system has einternal feedback. See parameter
FBACKSRC.
An up flank of this mark switches to external feedback (direct feedback) and a down flank
switches to internal feedback (motor feedback). If the combined feedback is active
(parameter FBMIXTIME), it is used with the up flank of this mark.