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CNC 8055 / CNC 8055i
Functions
associated to
machine safety
N
EW
F
EATURES
(S
OFT
M: 7.
XX
)
When the spindle moves with PLCCNTL, the spindle limitation is
ignored.
19.2 Cycle Start disabled by hardware errors
If when pressing the Cycle-Start key, a hardware error is detected
(Sercos board error, CAN board error, etc.), the CNC issues the
corresponding error message and does not allow executing or
simulating the program.
19.3 Maximum spindle machining speed.
To limit the spindle speed, use the MDISL variable associated with
speed limits. It is read-write from the PLC and read-only from DNC
and CNC.
This variable is also updated with the programmed S value, in the
following cases:
•
When programming "G92 S" in MDI mode
•
When programming "G92 S" in ISO code in MC mode.
•
In MC mode, when a new speed limit is defined in the "SMAX"
field.
The speed limits entered via CNC, PLC (PLCSL) and DNC (DNCSL)
keep the same functionality and priority unaffected by the new
MDISL variable; in other words, the CNC keeps limiting the spindle
speed like until now.
In order to comply with the safety regulation, it is recommended to
manage from the PLC the variables associated with speed limits as
shown in the following example:
•
A new part-program cannot be executed without previously
entering the speed limit. Otherwise, a message will be displayed.
If the program is executed again, the limit does not have to be
entered again, it is only required when executing the program for
the first time.
•
While executing a program if a new limit is entered in MDI, the
new one will replace the previous one.
•
In independent MC cycles it is not required to enter the SMAX
because it is already defined in each cycle.
•
If the program being executed already has a G92S, it will be
validated only if it is smaller than the one programmed in MDI.
•
When having two main spindles, the speed limit entered will be
valid for both.
PRG
REA
()=CNCRD(OPMODA,R100,M1000) ; Reading of OPMODA
B0R100 AND INCYCLE = M100 ; Indicator of program in execution
;
DFU M100 ; At the beginning of the execution
= CNCRD(PRGN,R101,M1000) ; reads the program in execution
= CNCRD(MDISL,R102,M1000) ; and the S limitation from MDI
;
M100 ; During the execution
= CNCRD(PRGSL,R103,M1000) ; and the S limitation from CNC
;
M100 AND CPS R101 NE R201 ; If new program in execution
= M101 ; activates mark M101
;
M100 AND CPS R101 EQ R201 ; If same program in execution
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