Fagor CNC 8065 - Page 330

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Installation manual
CNC 8060
CNC 8065
6.
LOGIC CNC INPUTS AND OUTPUTS.
(REF: 1402)
Spindle modifiable signals.
be sent to spindles that are not assigned to any channel. The PLC may change the spindle
speed using the variable "(V.)PLC.S.sn", but without generating a gear change even if the
gear change is automatic (parameter AUTOGEAR).
These M functions are treated the same way as those executed from the CNC. When the
CNC activates one of these marks, the CNC activates the MSTROBE mark and writes the
corresponding M function into the MFUN register. Once the M function has been
synchronized at the PLC (AUXEND signal), the CNC starts sending the velocity command
to that spindle, updates (refreshes) the M function history and deactivates the mark at the
PLC.
The CNC will admit M functions even if the channel is in execution (executing a program,
jogging an axis, etc.) as long as the channel status is other than "In error" and "Not ready"
and the channel is not doing a reset or validating machine parameters. If during tool
inspection, the PLC changes the turning direction of a spindle using these marks, the change
will be identified when repositioning and will appear as pending to reposition.
The CNC ignores the PLC requests in the following cases, when the CNC ignores the mark
set by the PLC and it erases it so the request does not remain pending.
• When the spindle is working as a C axis.
• When the spindle is threading (rigid tapping, normal tapping or electronic threading).
• When the CNC status is "In error" or "Not ready", is doing a reset or validating parameters.
If the PLC activates these marks while synchronizing another M function of the program
being executed or while homing the spindle, the PLC keeps this mark activated until the CNC
can attend to it.
SLIMITACSPDL
There is a mark for each spindle. The mnemonics for each spindle are the following:
SLIMITACSPDL1 (can also be programmed as SLIMITACSPDL)
SLIMITACSPDL2 SLIMITACSPDL3 SLIMITACSPDL4
If the PLC activates this mark, the CNC activates the speed safety limits (parameter SLIMIT)
on the indicated spindle during the execution of the current block. If the PLC deactivates this
mark, the CNC restores the programmed speed.