Installation manual
CNC 8035
LOGIC CNC INPUTS AND OUTPUTS
Spindle logic inputs.
10.
(SOFT M: V15.3X)
(S
OFT T: V16.3X)
·345·
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").
The PLC, then, activates the logic input "AUXEND" to "tell" the CNC that the execution of the gear
change has been completed.
Once the "AUXEND" input is activated, the CNC will require that this signal be kept active for a time
period greater than the value given to the g.m.p. "MINAENDW" (P30).
This way, erroneous interpretations of this signal by the CNC due to an improper PLC program logic
are avoided .
Once the "MINAENDW" time has elapsed with the "AUXEND" general input kept high, the CNC will
check whether the new spindle gear has been selected by verifying that the corresponding input
(GEAR1... GEAR4) is set high.
If it is, it will cancel the general logic output "MSTROBE" to "tell" the PLC that the gear change has
finished and if the corresponding input (GEAR1... GEAR4) is not selected, the CNC will stop the
axes feed and the spindle rotation displaying the corresponding error message.
If the M41, M42, M43 or M44 function does not use 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.
• The CNC will keep the output "MSTROBE" active during the time indicated by means of g.m.p.
MINAENDW (P30).
• After this time, the CNC will check whether the new spindle gear has been physically selected
by verifying that the corresponding GEAR input (GEAR1... GEAR4) is set high.
• If it is not selected, the CNC will stop the axes feed and the spindle rotation displaying the
corresponding error message.
SPENAS (M5462) | DRENAS (M5463) Main spindle
The CNC uses these signals when communicating with the drive via CAN. Every time the PLC sets
one of these signals high, the CNC lets the corresponding drive know about it.
These signals correspond to the "speed enable" and "drive enable" signals of the drive. The drive
manual describes how the two signals work, however, remember the following:
• Both signals must be initialized low when powering up the PLC.
• For normal drive operation, both signals must be set high.
• A down flank (trailing edge) of the DRENA signal (drive enable) turns off the power circuit of the
drive and the motor loses its torque. In this situation, the motor is no longer governed and it will
stop when its kinetic energy runs out. (Stop by friction).
• A trailing edge of the SPENA signal (speed enable) switches the "internal velocity reference"
to "0" rpm and brakes the motor while maintaining its torque. Once the motor has stopped, the
drive's power circuit is turned off and the motor has no torque.
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