Installation manual
CNC 8035
PLC PROGRAMMING EXAMPLE
Main module.
13.
(SOFT M: V15.3X)
(S
OFT T: V16.3X)
·415·
----- Treatment of M, S, T functions -----
The CNC activates the general logic output MSTROBE to "tell" the PLC to execute the M functions
indicated at the variables MBCD1 through MBCD7.
It also activates: the SSTROBE output when the S function indicated at variable SBCD must be
executed, the TSTROBE output when the T function indicated at variable TBCD must be executed
and the T2STROBE output when the T function indicated at variable T2BCD must be executed.
Whenever the CNC activates one of these signals, it is convenient to deactivate the general CNC
input AUXEND in order to interrupt the execution of the CNC. When the PLC concludes the
processing of the required function, this AUXEND signal must be activated back so that the CNC
resumes the execution of the interrupted program.
This example deactivates the AUXEND signal for 100 milliseconds using the timer T1.
MSTROBE OR SSTROBE OR TSTROBE OR T2STROBE = TG1 1 100
The activation of the STROBE signals activates timer T1 in the mono-stable mode for 100
milliseconds.
Whenever timer T1 is active, the PLC must set the AUXEND signal low as described in: "Treatment
of the general CNC input AUXEND".
When the CNC activates the MSTROBE signal, the contents of variables MBCD1 through MBCD7
must be analyzed in order to know which auxiliary functions are to be executed. All MBCD variables
may be analyzed at the same time by using "MBCD*".
This example SETs the auxiliary marks so they can be analyzed later. Once analyzed, they must
be RESet so that the PLC does not analyze them again on the next cycle (scan).
DFU MSTROBE AND CPS MBCD* EQ $0 = RES M-08
DFU MSTROBE AND CPS MBCD* EQ $2 = RES M-08
Functions M00 and M02 cancel the coolant (M08).
DFU MSTROBE AND CPS MBCD* EQ $3 = SET M-03 = RES M-04
DFU MSTROBE AND CPS MBCD* EQ $4 = SET M-04 = RES M-03
DFU MSTROBE AND CPS MBCD* EQ $5 = RES M-03 = RES M-04
Functions M03 and M04 are incompatible with each other and M05 cancels both.
DFU MSTROBE AND CPS MBCD* EQ $8 = SET M-08
DFU MSTROBE AND CPS MBCD* EQ $9 = RES M-08
DFU MSTROBE AND CPS MBCD* EQ $30 = RES M-08
Functions M09 and M30 cancel the coolant (M08)
DFU MSTROBE AND CPS MBCD* EQ $41 = SET M-41 = RES M-42
DFU MSTROBE AND CPS MBCD* EQ $42 = SET M-42 = RES M-41
Functions M41 and M42 are incompatible with each other.
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