Fagor CNC 8055i, Installation Manual

Page: 503 / 732

Installation manual
CNC 8055
CNC 8055i
LOGIC CNC INPUTS AND OUTPUTS
12.
S
OFT
: V02.2
X
·503·
Spind
le log
ic
inpu
ts.
On the other hand, if the SERVOSON signal is low or if it changes to low during the rotation of the
spindle, the CNC will stop the axes feed and the spindle rotation displaying the corresponding error
message.
DWELL<>0
If spindle parameter DWELL (P17) has been set to other than "0", the CNC will check the status
of the SERVOSON signal at the time when the ENABLE signal is to be output.
If the SERVOSON signal is high, the CNC will allow the spindle to rotate by activating the ENABLE
signal and providing the required velocity command output.
On the other hand, if the SERVOSON signal is low, the CNC will activate the ENABLE signal and,
after waiting for a time period indicated by the value given to "DWELL", the CNC checks the
SERVOSON signal again. If it is high, the required spindle velocity command will be output. If low,
the CNC will stop the axes feed and the spindle rotation displaying the corresponding error message.
Also, if it changes to low during the rotation of the spindle, the CNC will stop the axes feed and the
spindle rotation displaying the corresponding error message.
GEAR1 (M5458) GEAR2 (M5459) GEAR3 (M5460) GEAR4 (M5461) Cabezal principal
GEAR12 (M5483) GEAR22 (M5484) GEAR32 (M5485) GEAR42 (M5486) Segundo cabezal
The PLC uses these signals to indicate to the CNC which spindle gear is currently selected (high
logic level). The CNC only considers the signals for the currently selected spindle.
When any of the miscellaneous functions M41, M42, M43 or M44 is programmed, the CNC will "tell"
the PLC so it selects the desired gear even if it is already selected.
When working with automatic gear changer, the CNC will check the currently selected gear
(GEAR1... GEAR4) and if it does not match the selected speed, the CNC will let the PLC know using
the relevant auxiliary function (M41, M42, M43 or M44) to select it.
Once the PLC selects the proper gear, it indicates it to the CNC by means of the logic input
corresponding to the spindle (GEAR1 ...). GEAR4).
The spindle gear change depends on the setting of functions M41 through M44 in the M function
table:
The M41, M42, M43 or M44 function uses the "AUXEND" signal:
The CNC indicates to the PLC the selected gear M41, M42, M43 or M44 in one of the registers
"MBCD1" through "MBCD7" and it activates the "MSTROBE" signal to let the PLC "know" that it must
execute it.
When the PLC detects the activation of the "MSTROBE" signal it must deactivate the general logic
input "AUXEND" to "tell" the CNC that the execution of the gear change has started.
Once executed this function, the PLC will inform the CNC that the new gear has been selected by
means of the logic input corresponding to the spindle ("GEAR1".... "GEAR4").